SPIRIT AEROSYSTEMS HOLDINGS, INC., 10-K filed on 2/15/2022
Annual Report
v3.22.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Jan. 20, 2022
Jul. 01, 2021
Class of Stock [Line Items]      
Title of 12(b) Security Class A common stock, par value $0.01 per share    
Security Exchange Name NYSE    
Entity Incorporation, State or Country Code DE    
Document Transition Report false    
Entity Common Stock, Shares Outstanding   105,037,082  
Entity File Number 001-33160    
Entity Tax Identification Number 20-2436320    
Entity Address, Address Line One 3801 South Oliver    
Entity Address, City or Town Wichita    
Entity Address, State or Province KS    
Entity Address, Postal Zip Code 67210    
City Area Code 316    
Local Phone Number 526-9000    
Entity Interactive Data Current Yes    
Current Fiscal Year End Date --12-31    
Entity Shell Company false    
Document Period End Date Dec. 31, 2021    
Trading Symbol SPR    
Document Annual Report true    
Entity Current Reporting Status Yes    
ICFR Auditor Attestation Flag true    
Entity Registrant Name Spirit AeroSystems Holdings, Inc.    
Entity Central Index Key 0001364885    
Document Type 10-K    
Document Period End Date Dec. 31, 2021    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Public Float     $ 4,980,000,000
Trading Symbol SPR    
Document Information [Line Items]      
Auditor Name Ernst & Young LLP    
Auditor Location Wichita, Kansas    
Auditor Firm ID 42    
v3.22.0.1
Consolidated Statements of Operations - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Statement [Abstract]      
Net revenues $ 3,953.0 $ 3,404.8 $ 7,863.1
Operating costs and expenses      
Cost of sales 4,070.8 3,845.5 6,786.4
Selling, general and administrative 279.9 237.4 261.4
Restructuring Charges 8.2 73.0 0.0
Research and development 53.3 38.8 54.5
Gain (Loss) on Disposition of Property Plant Equipment 0.0 22.9 0.0
Total operating costs and expenses 4,412.2 4,217.6 7,102.3
Operating (loss) income (459.2) (812.8) 760.8
Interest expense and financing fee amortization (242.6) (195.3) (91.9)
Other income (expense), net (146.6) 77.8 5.8
(Loss) income before income taxes and equity in net (loss) income of affiliates (555.2) (1,085.9) 663.1
Income tax benefit (provision) 17.2 220.2 (132.8)
(Loss) income before equity in net (loss) income of affiliates (538.0) (865.7) 530.3
Equity in net loss of affiliates (2.8) (4.6) (0.2)
Net (loss) income $ (540.8) $ (870.3) $ 530.1
(Loss) earnings per share      
Basic (in dollars per share) $ (5.19) $ (8.38) $ 5.11
Earnings Per Share, Diluted (5.19) (8.38) 5.06
Common Stock, Dividends, Per Share, Declared $ 0.04 $ 0.04 $ 0.48
v3.22.0.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net (loss) income $ (540.8) $ (870.3) $ 530.1
Other comprehensive income (loss), net of tax:      
Pension, SERP and Retiree medical adjustments, net of tax 136.3 (61.5) 71.7
Unrealized foreign exchange gain (loss) on intercompany loan, net of effect (0.4) 1.3 4.3
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax (2.0) (10.9) (0.6)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax 0.8 10.7  
Foreign currency translation adjustments (4.3) 15.5 20.3
Total other comprehensive income (loss), net of tax 130.4 (44.9) 95.7
Total comprehensive (loss) income $ (410.4) $ (915.2) $ 625.8
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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension, SERP and Retiree medical adjustments, tax $ (15.1) $ (8.6) $ (21.9)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax 0.0 3.4 0.2
Unrealized foreign exchange gain (loss) on intercompany loan, tax 0.2 (0.4) 2.1
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax $ (0.3) $ (3.3) $ 0.0
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Consolidated Balance Sheets - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Assets    
Cash and cash equivalents $ 1,478.6 $ 1,873.3
Restricted Cash, Current 0.3 0.3
Accounts receivable, net 461.6 484.4
Unbilled Receivables, Current 443.2 368.4
Inventory, net 1,382.6 1,422.3
Other current assets 39.7 336.3
Total current assets 3,806.0 4,485.0
Property, plant and equipment, net 2,385.5 2,503.8
Operating Lease, Right-of-Use Asset 85.3 70.6
Unbilled Receivable, Non Current 0.0 4.4
Pension assets 532.5 455.9
Deferred tax asset-non-current, net 0.4 0.1
Other assets 91.6 83.6
Total assets 7,737.3 8,383.9
Liabilities    
Accounts payable 720.3 558.9
Accrued expenses 376.1 365.6
Profit sharing 63.7 57.0
Current portion of long-term debt 49.5 340.7
Operating Lease, Liability, Current 8.2 5.5
Advance payments, short-term 137.8 18.9
Contract with Customer, Liability, Current 97.9 97.6
Provision for Loss on Contracts 244.6 184.6
Deferred revenue and other deferred credits, short-term 72.7 22.2
Other current liabilities 105.2 58.4
Total current liabilities 1,876.0 1,709.4
Long-term debt 3,742.7 3,532.9
Operating Lease, Liability, Noncurrent 78.8 66.6
Advance payments, long-term 201.3 327.4
Pension/OPEB obligation 74.8 440.2
Contract with Customer, Liability, Noncurrent 289.1 372.0
Provision for Loss on Contacts, Non Current 521.6 561.4
Deferred grant income liability — non-current 26.4 28.1
Deferred Tax Liabilities, Net, Noncurrent 21.8 13.0
Deferred revenue and other deferred credits 32.1 38.9
Other non-current liabilities 423.9 437.0
Stockholders’ Equity    
Preferred stock, par value $0.01, 10,000,000 shares authorized, no shares issued         0.0 0.0
Additional paid-in capital 1,146.2 1,139.8
Accumulated other comprehensive loss (23.7) (154.1)
Retained earnings 1,781.4 2,326.4
Treasury Stock, Value (2,456.7) (2,456.7)
Total stockholders' equity 448.3 856.5
Noncontrolling interest 0.5 0.5
Total equity 448.8 857.0
Total liabilities and equity 7,737.3 8,383.9
Goodwill 623.7 565.3
Intangible Assets, Net (Excluding Goodwill) $ 212.3 $ 215.2
Preferred Stock, Par Value $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 10,000,000 10,000,000
Treasury Stock, Shares 41,523,470 41,523,470
Class A [Member]    
Stockholders’ Equity    
Common stock $ 1.1 $ 1.1
Common Stock, Par Value $ 0.01 $ 0.01
Common Stock, Shares Authorized 200,000,000 200,000,000
Common Stock, Shares, Issued 105,037,845 105,542,162
Class B [Member]    
Stockholders’ Equity    
Common Stock, Par Value $ 0 $ 0
Common Stock, Shares Authorized 0 0
Common Stock, Shares, Issued 0 0
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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2021
Dec. 31, 2020
Shareholders' equity    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Treasury Stock, Shares 41,523,470 41,523,470
Class A [Member]    
Shareholders' equity    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 105,037,845 105,542,162
Class B [Member]    
Shareholders' equity    
Common stock, par value $ 0 $ 0
Common stock, shares authorized 0 0
Common stock, shares issued 0 0
v3.22.0.1
Consolidated Statements of Changes in Shareholders Equity - USD ($)
$ in Millions
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Treasury Stock, Common [Member]
AOCI Including Portion Attributable to Noncontrolling Interest
Treasury Stock, Value $ (2,381.0)            
Balance, shares at Dec. 31, 2018   105,461,817          
Balance at Dec. 31, 2018 1,237.6 $ 1.1 $ 1,100.9 $ (196.6) $ 2,713.2    
Net (loss) income 530.1       530.1    
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect 0.0       8.3   $ (8.3)
Dividends, Common Stock, Cash (50.3)       (50.3)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures   448,594          
Employee equity awards, value 34.4   34.4        
Stock forfeitures, shares   125,055          
Net shares settled   137,500          
Payment, Tax Withholding, Share-based Payment Arrangement 12.9   12.9        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   32,341          
Stock Issued During Period, Value, Employee Stock Purchase Plan 2.6   2.6        
Treasury Stock, Shares, Acquired   (804,032)          
SERP shares issued   6,214          
Supplemental Retirement Plan Shares Issued Value 0.0   0.0        
Treasury Stock, Value, Acquired, Cost Method     0.0     $ (75.8)  
Stock Repurchased During Period, Value (75.8)            
Other Comprehensive Income 95.7            
Balance, shares at Dec. 31, 2019   104,882,379          
Balance at Dec. 31, 2019 1,761.4 $ 1.1 1,125.0 (109.2) 3,201.3    
Treasury Stock, Value (2,456.8)            
Net (loss) income (870.3)            
Dividends, Common Stock, Cash (4.4)       (4.4)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures   952,392          
Employee equity awards, value 26.7   26.7        
Stock forfeitures, shares   192,111          
Net shares settled   224,964          
Payment, Tax Withholding, Share-based Payment Arrangement 14.5   14.5        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   124,466          
Treasury Stock, Shares, Acquired   0          
Supplemental Retirement Plan Shares Issued Value 2.6   2.6        
Treasury Stock, Value, Acquired, Cost Method 0.1   0.0     $ 0.1  
Other Comprehensive Income (44.9)            
Balance, shares at Dec. 31, 2020   105,542,162          
Balance at Dec. 31, 2020 856.5 $ 1.1 1,139.8 (154.1) 2,326.4    
Other retained earnings (0.2)       (0.2)    
Treasury Stock, Value (2,456.7)            
Net (loss) income (540.8)            
Dividends, Common Stock, Cash (4.3)       (4.3)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures   59,538          
Employee equity awards, value 25.8   25.8        
Shares Issued, Value, Share-based Payment Arrangement, Forfeited (17.1)   (17.1)        
Stock forfeitures, shares   (523,551)          
Net shares settled   116,025          
Payment, Tax Withholding, Share-based Payment Arrangement 5.2   5.2        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   66,523          
Stock Issued During Period, Value, Employee Stock Purchase Plan 2.9   2.9        
SERP shares issued   9,198          
Other Comprehensive Income 130.4            
Balance, shares at Dec. 31, 2021   105,037,845          
Balance at Dec. 31, 2021 448.3 $ 1.1 $ 1,146.2 $ (23.7) 1,781.4    
Other retained earnings 0.1       $ 0.1    
Treasury Stock, Value $ (2,456.7)            
v3.22.0.1
Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities      
Depreciation and amortization expense $ 327.6 $ 277.6 $ 251.7
Amortization of deferred financing fees 15.1 20.4 3.5
Accretion of customer supply agreement 3.5 2.0 4.3
Employee stock compensation expense 25.8 24.2 36.1
(Gain) loss from derivative instruments (0.1) 0.0 8.1
(Gain) loss from foreign currency transactions (4.4) 25.0 1.6
Loss on disposition of assets 4.1 26.4 4.9
Deferred taxes (4.5) 94.0 86.1
Long term income tax payable 0.0 1.5  
Pension and other post-retirement plans (income) expense (109.1) 44.5 (20.0)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits (173.8) (5.6) (1.8)
Grant liability amortization (1.5) (3.5) (16.2)
Equity in net loss of affiliates 2.8 4.6 0.2
Increase (Decrease) in Forward Position (10.4) 216.5 40.7
Changes in assets and liabilities      
Accounts receivable, net 51.5 168.3 12.8
Inventory, net 30.9 (39.5) (95.4)
Increase (Decrease) in Contract with Customer, Asset (70.9) 168.2 (5.2)
Accounts payable and accrued liabilities 160.2 (592.7) 34.6
Profit sharing/deferred compensation 6.2 (28.2) 16.0
Advance payments 2.7 (21.0) 120.8
Income taxes receivable/payable 302.4 (246.3) (59.6)
Increase (Decrease) in Contract with Customer, Liability (82.4) (49.5) (13.0)
Other 1.9 38.5 (17.6)
Net cash (used in) provided by operating activities (63.2) (744.9) 922.7
Investing activities      
Purchase of property, plant and equipment (150.6) (118.9) (232.2)
Payments to Acquire Businesses, Net of Cash Acquired (21.1) (388.5)  
Payments for (Proceeds from) Other Investing Activities (7.9) (5.4) 7.7
Net cash used in investing activities (163.8) (502.0) (239.9)
Proceeds from Issuance of Secured Debt 600.0 400.0 250.0
Financing activities      
Proceeds from Issuance of Senior Long-term Debt 0.0 1,700.0  
Proceeds from revolving credit facility 0.0 0.0 900.0
Payments on revolving credit facility 0.0 (800.0) (100.0)
Principal payments of debt (42.1) (31.6) (13.4)
Repayments of Debt (401.5) (439.7) (16.6)
Early Repayment of Senior Debt (300.0) 0.0 0.0
Payment, Tax Withholding, Share-based Payment Arrangement (5.2) (14.5) (12.9)
Proceeds from Stock Plans 3.0 2.6 2.6
Debt issuance and financing costs (3.4) (41.9) 0.0
Proceeds from (Repurchase of) Equity   (0.1)  
Payments for Repurchase of Common Stock 0.0   (75.8)
Payments of Dividends (4.3) (15.4) (50.4)
Proceeds from (Payments for) Other Financing Activities 0.0 (0.1) 0.9
Net cash (used in) provided by financing activities (163.5) 769.5 884.4
Effect of exchange rate changes on cash and cash equivalents (4.2) 3.3 5.9
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period (394.7) (474.1) 1,573.1
Cash, cash equivalents, and restricted cash, end of period 1,478.6 1,873.3 2,350.5
Restricted Cash, Current 0.3 0.3 0.3
Restricted Cash and Investments, Noncurrent 19.5 19.5 16.4
Supplemental information      
Interest paid 198.4 146.6 93.2
Proceeds from Income Tax Refunds (314.4)    
Income taxes paid   (62.5) (105.0)
Property acquired through capital leases 32.1 26.3 120.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 1,498.4 1,893.1 2,367.2
Proceeds from (Repayments of) Other Debt (10.0) 10.0  
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest $ (540.8) $ (870.3) $ 530.1
v3.22.0.1
Nature of Business
 12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Nature of Business Nature of Business
Spirit AeroSystems Holdings, Inc. and its consolidated subsidiaries (the “Company”) provides manufacturing and design expertise in a wide range of fuselage, propulsion, and wing products and services for aircraft original equipment manufacturers (“OEM”) and operators through its subsidiaries, including Spirit AeroSystems, Inc. (“Spirit”). As used herein, “Company” refer to Spirit AeroSystems Holdings, Inc. and its consolidated subsidiaries. References to “Spirit” refer only to our subsidiary, Spirit AeroSystems, Inc., and references to “Spirit Holdings” or “Holdings” refer only to Spirit AeroSystems Holdings, Inc.

The Company's headquarters are in Wichita, Kansas, with manufacturing and assembly facilities in Tulsa, Oklahoma; Prestwick, Scotland; Wichita, Kansas; Kinston, North Carolina; Subang, Malaysia; Saint-Nazaire, France; Biddeford, Maine; Belfast, Northern Ireland; Morocco, Casablanca; and Dallas, Texas. The Company has previously announced site consolidation activities, including the McAlester, Oklahoma and San Antonio, Texas sites. The work transfer and closure activities for these sites are complete as of December 31, 2021.
The Company largely supports commercial aerostructures customers, and the Company's financial results and prospects are almost entirely dependent on global commercial aviation demand and the resulting production rates of the Company's customers. In response to COVID-19 impacts, the Company's customers, including Boeing and Airbus, have decreased production rates across many programs and may further adjust production rates or suspend production in the future.
COVID-19’s impact on the Company's financial performance during the periods of 2020 and 2021 has reduced the Company's liquidity and, as a result, the Company took steps to reduce costs and raise additional debt. As of December 31, 2019, the Company had a debt balance of approximately $3,034.3, most of which was unsecured debt, and a cash balance of $2,350.5. As of December 31, 2021, the Company had a debt balance of approximately $3,792.2, more than 50% was secured debt, and a cash balance of $1,478.6. The Company anticipates that it will have sufficient liquidity to meet operating and financing needs for at least the next 12 months.
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Accounting Changes and Error Corrections (Notes)
 12 Months Ended
Dec. 31, 2021
Accounting Changes and Error Corrections [Abstract]  
Accounting Standards Update and Change in Accounting Principle Adoption of Accounting Standards
Adoption of ASU 2016-13

In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-13, (“ASU 2016-13”), which requires the immediate recognition of management's estimates of current expected credit losses. ASU 2016-13 is effective for fiscal years and interim reporting periods within those years beginning after December 15, 2019. Early adoption is permitted after fiscal years beginning December 15, 2018. The Company adopted ASU 2016-13 as of January 1, 2020 by means of the modified retrospective method and required cumulative-effect adjustment to the opening retained earnings as of that date. The cumulative-effect adjustment to the opening retained earnings as of January 1, 2020 was not material. All credit losses in accordance with ASU 2016-13 were on receivables and/or contract assets arising from the Company’s contracts with customers including the cumulative-effect adjustment to the opening retained earnings. There is no significant impact to our operating results due to the adoption of ASU 2016-13. See Note 6 Accounts Receivable, net for more information on ASC 326 allowance for credit losses.

Adoption of ASU 2019-12

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, Simplifying the Accounting for Income Taxes ("ASU 2019-12”), which modifies FASB Accounting Standards Codification (“ASC”) Topic 740 to simplify the accounting for income taxes. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020. The adoption of ASU 2019-12 as of January 1, 2021 did not have a material impact on our financial position or results of operations.

Adoption of ASU 2020-09

In October 2020, the FASB issued ASU No. 2020-09 (“ASU 2020-09”), which revises certain SEC paragraphs of the ASC to reflect, as appropriate, the amended financial statement disclosure requirements in SEC Release 33-10762, Financial
Disclosures about Guarantors and Issuers of Guaranteed Securities and Affiliates Whose Securities Collateralize a Registrant’s Securities. There is no impact to our financial position or results of operations due to the adoption of ASU 2020-09.
v3.22.0.1
Summary of Significant Accounting Policies
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
New Accounting Pronouncements, Policy [Policy Text Block]
4.  New Accounting Pronouncements

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”), which provides temporary optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022, and an entity may elect to apply ASU 2020-04 for contract modifications by Topic or Industry Subtopic as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020, up to the date that the financial statements are available to be issued. An entity may elect to apply ASU 2020-04 to eligible hedging relationships
existing as of the beginning of the interim period that includes March 12, 2020, and to new eligible hedging relationships entered into after the beginning of the interim period that includes March 12, 2020. The Company is currently evaluating the potential impact of adopting this guidance on our consolidated financial statements.
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
Basis of Presentation
The accompanying consolidated financial statements include the Company’s financial statements and the financial statements of its majority owned or controlled subsidiaries and have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) and Regulation S-X. All intercompany balances and transactions have been eliminated in consolidation.
Spirit is the majority participant in the Kansas Industrial Energy Supply Company ("KIESC"), a tenancy-in-common with other Wichita companies established to purchase natural gas. KIESC is fully consolidated as the Company owns 77.8% of the entity’s equity.
The Company’s U.K. subsidiary in Prestwick uses local currency, the British pound sterling, as its functional currency, and the Malaysian subsidiary also uses the British pound sterling as its functional currency. All other foreign subsidiaries and branches use the U.S. dollar as their functional currency. As part of the monthly consolidation process, the functional currencies of the Company’s international subsidiaries are translated to U.S. dollars using the end-of-month translation rate for assets and liabilities and average period currency translation rates for revenue and income accounts.
Use of Estimates
The preparation of the Company's financial statements in conformity with GAAP requires management to use estimates and assumptions. The results of these estimates form the basis for making judgments that may affect the reported amounts of assets and liabilities, including the impacts of contingent assets and liabilities, and the reported amounts of revenue and expenses during the reporting period.

Management may make significant judgments when assessing estimated amounts of variable consideration and related constraints, the number of options likely to be exercised, and the standalone selling prices of the Company’s products and services. The Company also estimates the cost of satisfying the performance obligations in its contracts and options that may extend over many years. Cost estimates reflect currently available information and the impact of any changes to cost estimates, based upon the facts and circumstances, are recorded in the period in which they become known.

The transaction price for a contract reflects the consideration the Company expects to receive for fully satisfying the performance obligations in the contract. The Company’s contracts with customers are typically for products and services to be provided at fixed stated prices but may also include variable consideration. Variable consideration may include, but is not limited to, unpriced contract modifications, cost sharing provisions, incentives and awards, non-warranty claims and assertions, provisions for non-conformance and rights to return, or other payments to, or receipts from, customers. The Company estimates the variable consideration using the expected value or the most likely amount based upon the facts and circumstances, available data and trends and the history of resolving variability with specific customers and suppliers.

The Company regularly commences work and incorporates customer-directed changes prior to negotiating pricing terms for engineering work, product modifications, and other statements of work. The Company's contractual terms typically provide for price negotiations after certain customer-directed changes have been accepted by the Company. Prices are estimated until they are contractually agreed upon with the customer. When a contract is modified, the Company evaluates whether additional distinct products and services have been promised at standalone selling prices, in which case the modification is treated as a separate contract. If not, depending on whether the remaining performance obligations are distinct from the goods or services transferred on or before the modification, the modification is either treated prospectively as if it were a termination of the existing contract and the creation of a new contract, treated as if it were a part of the existing contract, or treated as some combination.
The Company allocates the consideration for a contract to the performance obligations on the basis of their relative standalone selling price. The Company estimates the likelihood of the amount of options that the customer is going to exercise when assessing the impact of loss contracts.

The Company typically provides warranties on all the Company's products and services. Generally, warranties are not priced separately and customers cannot purchase them independently of the products or services under contract, so they do not create performance obligations. The Company's warranties generally provide assurance to the Company's customers that the products or services meet the specifications in the contract. In the event that there is a warranty claim because of a covered design, material or workmanship issue, the Company may be required to redesign or modify the product, offer concessions, and/or pay the customer for repairs or perform the repair. Provisions for estimated expenses related to design, service, and product warranties and certain extraordinary rework are made at the time products are sold. These costs are accrued at the time of the sale and are recorded as unallocated cost of sales. These estimates are established using historical information on the nature, frequency, and the cost experience of warranty claims, including the experience of industry peers. In the case of new development products or new customers, the Company also considers factors including the warranty experience of other entities in the same business, management judgment, and the type and nature of the new product or new customer, among others.
Actual results could differ from those estimates and assumptions.
Revenues and Profit Recognition
Substantially all of the Company’s revenues are from long-term supply agreements with Boeing, Airbus, and other aerospace manufacturers. The Company participates in its customers’ programs by providing design, development, manufacturing, fabrication, and support services for major aerostructures in the commercial, defense and space, and aftermarket segments. During the early stages of a program, this frequently involves nonrecurring design and development services, including tooling. As the program matures, the Company provides recurring manufacturing of products in accordance with customer design and schedule requirements. Many contracts include clauses that provide sole supplier status to the Company for the duration of the program’s life (including derivatives). The Company's long-term supply agreements typically include fixed price volume-based terms and require the satisfaction of performance obligations for the duration of the program’s life.

The identification of an accounting contract with a customer and the related promises require an assessment of each party’s rights and obligations regarding the products or services to be transferred, including an evaluation of termination clauses and presently enforceable rights and obligations. In general, these long-term supply agreements are legally governed by master supply agreements (or general terms agreements) together with special business provisions (or work package agreements), which define specific program requirements. Purchase orders (or authorizations to proceed) are issued under these agreements to reflect presently enforceable rights and obligations for the units of products and services being purchased. The units for accounting purposes (“accounting contract”) are typically determined by the purchase orders. Revenue is recognized when the Company has a contract with presently enforceable rights and obligations, including an enforceable right to payment for work performed. These agreements may lead to continuing sales for more than twenty years. Customers generally contract with the Company for requirements relating to a specific program, and the Company’s performance obligations consist of a wide range of engineering design services and manufactured structural components, as well as spare parts and repairs for OEMs. A single program may result in multiple contracts for accounting purposes, and within the respective contracts, non-recurring work elements and recurring work elements may result in multiple performance obligations. The Company generally contracts directly with its customers and is the principal in all current contracts.

Management considers a number of factors when determining the existence of an accounting contract and the related performance obligations that include, but are not limited to, the nature and substance of the business exchange, the contractual terms and conditions, the promised products and services, the termination provisions in the contract, including the presently enforceable rights and obligations of the parties to the contract, the nature and execution of the customer’s ordering process and how the Company is authorized to perform work, whether the promised products and services are distinct or capable of being distinct within the context of the contract, as well as how and when products and services are transferred to the customer.

Revenue is recognized when, or as, control of promised products or services transfers to a customer and is recognized in an amount that reflects the consideration that the Company expects to receive in exchange for those products or services. Revenue is recognized over time as work progresses when the Company is entitled to the reimbursement of costs plus a reasonable profit for work performed for which the Company has no alternate use. For these performance obligations that are satisfied over time,
the Company generally recognizes revenue using an input method with revenue amounts being recognized proportionately as costs are incurred relative to the total expected costs to satisfy the performance obligation. The Company believes that costs incurred as a portion of total estimated costs is an appropriate measure of progress towards satisfaction of the performance obligation since this measure reasonably depicts the progress of the work effort. When the Company experiences abnormal production costs such as excess capacity costs the Company will expense the costs in the period incurred separately from the costs incurred for satisfaction of the performance obligations under the Company's contracts with customers.

Revenue for performance obligations that are not recognized over time are recognized at the point in time when control transfers to the customer. For performance obligations that are satisfied at a point in time, the Company evaluates the point in time when the customer can direct the use of, and obtain the benefits from, the products and services. Shipping and handling costs are not considered performance obligations and are included in cost of sales as incurred.

The transaction price for a contract reflects the consideration the Company expects to receive for fully satisfying the performance obligations in the contract. The Company’s current contracts do not include any significant financing components because the timing of the transfer of the underlying products and services under contract are at the customers’ discretion. Additionally, the Company does not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the entity transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. The Company's contracts with customers generally require payment under normal commercial terms after delivery. Payment terms are typically within 30 to 120 days of delivery. The total transaction price is allocated to each of the identified performance obligations using the relative standalone selling price to reflect the amount the Company expects to be entitled for transferring the promised products and services to the customer.

Standalone selling price is the price at which the Company would sell a promised good or service separately to a customer. Standalone selling prices are established at contract inception and subsequent changes in transaction price are allocated on the same basis as at contract inception. Standalone selling prices for the Company’s products and services are generally not observable and the Company uses the “Expected Cost plus a Margin” approach to determine standalone selling price. Expected costs are typically derived from the available periodic forecast information. If a contract modification changes the overall transaction price of an existing contract, the Company allocates the new transaction price on the basis of the relative standalone selling prices of the performance obligations and cumulative adjustments, if any, are recorded in the current period.

The Company also identifies and estimates variable consideration for contractual provisions such as unpriced contract modifications, cost sharing provisions, incentives and awards, non-warranty claims and assertions, provisions for non-conformance and rights to return, or other payments to, or receipts from, customers and suppliers. The timing of satisfaction of performance obligations and actual receipt of payment from a customer may differ and affects the balances of the contract assets and liabilities.

For contracts that are deemed to be loss contracts, the Company establishes forward loss reserves for total estimated costs that are in excess of total estimated consideration in the period in which they become known. These reserves are based on estimates for accounting contracts, plus options that the Company believes are likely to be exercised. The Company records forward loss reserves for all performance obligations in the aggregate for the accounting contract.
Research and Development
Research and development includes costs incurred for experimentation, design, and testing that are expensed as incurred.
Cash and Cash Equivalents
Cash and cash equivalents represent all highly liquid investments with original maturities of three months or less.
Accounts Receivable
Accounts receivable are recorded at the invoiced amount and do not bear interest. Unbilled receivables are recorded on the balance sheet as contract assets, as per ASC 606 guidance. Beginning January 1, 2020, management assesses and records an allowance for credit losses on financial assets within the scope of ASU 2016-13 using the CECL model. Prior periods allowance for credit losses were based on a review of outstanding receivables that are charged off against the allowance after the potential for recovery is considered remote in accordance with legacy GAAP. The amount necessary to adjust the allowance
for credit losses to management’s current estimate, as of the reporting date, on these assets is recorded in net income as credit loss expense. All credit losses reported in accordance with ASU 2016-13 were on trade receivables and/or contract assets arising from the Company’s contracts with customers. See Note 6, Accounts Receivable, net, for more information.
The Company has three agreements to sell, on a revolving basis, certain trade accounts receivable balances with Boeing, Airbus, and Rolls-Royce to a third party financial institution. These programs were primarily entered into as a result of customers seeking payment term extensions with the Company and continue to allow the Company to monetize the receivables prior to the payment date, subject to payment of a discount. No guarantees are delivered under the agreements. The Company's ability to continue using such agreements is primarily dependent upon the strength of Boeing’s and Airbus’s financial condition. Transfers under this agreement are accounted for as sales of receivables resulting in the receivables being de-recognized from the Company's balance sheet. For additional information on the sale of receivables see Note 6, Accounts Receivable, net.
Inventory
Raw materials are stated at lower of cost (principally on an actual or average cost basis) or net realizable value. Production costs for contracts, including costs expected to be recovered on specific anticipated contracts (work that has commenced because the Company expects the customer to exercise options), are classified as work-in-process and include direct material, labor, overhead, and purchases. Typically, anticipated contracts materialize and the related performance obligations are satisfied within 6-12 months. These costs are evaluated for impairment periodically and capitalized costs for which anticipated contracts do not materialize are written off in the period in which it becomes known. Revenue and related cost of sales are recognized as the performance obligations are satisfied. When the Company experiences abnormal production costs such as excess capacity costs the Company will expense the costs in the period incurred and these costs are excluded from inventoriable costs. Valuation reserves for excess, obsolete, and slow-moving inventory are estimated by evaluating inventory of individual raw materials and parts against both historical usage rates and forecasted production requirements. See Note 9, Inventory.
Property, Plant and Equipment
Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation is applied using a straight-line method over the useful lives of the respective assets as described in the following table:
 Estimated Useful Life
Land improvements20 years
Buildings45 years
Machinery and equipment3-20 years
Tooling — Airplane program — B787, Rolls-Royce5-20 years
Tooling — Airplane program — all others2-10 years
Capitalized software3-7 years
The Company capitalizes certain costs, such as software coding, installation, and testing, that are incurred to purchase or to create and implement internal-use computer software. The Company’s capitalization policy includes specifications that the software must have a service life greater than one year, is legally and substantially owned by the Company, and has an acquisition cost of greater than $0.1. The Company applies the same criteria for capitalizing implementation costs incurred in a cloud computing arrangement hosted by the vendor.
Where the Company is involved in build-to-suit leasing arrangements, the Company is deemed the owner of the asset for accounting purposes during the construction period of the asset. The Company records the related assets and liabilities for construction costs incurred under these build-to-suit leasing arrangements during the construction period. Upon completion of the asset, the Company considers whether the assets and liabilities qualify for derecognition under the sale-leaseback accounting guidance. See Note 10, Property, Plant and Equipment, net.
Impairment or Disposal of Long-Lived Assets
The Company reviews capital and amortizing intangible assets (long-lived assets) for impairment whenever events or changes in circumstances indicate that the recorded amount may not be recoverable. Assets are classified as either held-for-use or available-for-sale. For held-for-use assets, if indicators are present, we perform a recoverability test by comparing the sum of the estimated undiscounted future cash flows attributable to the asset group in question to its carrying amount. If the undiscounted cash flows used in the recoverability test are less than the long-lived asset group’s carrying amount, we determine the fair value of the long-lived asset group and recognize an impairment loss if the carrying amount of the long-lived asset group exceeds its fair value. For assets available-for-sale, a loss is recognized when the recorded amount exceeds the fair value less cost to sell.

Business Combinations and Goodwill

The Company accounts for business combinations in accordance with ASC Topic 805, Business Combinations. Transaction costs related to business combinations are expensed as incurred. Assets acquired and liabilities assumed are measured and recognized based on their estimated fair values at the acquisition date, any excess of the purchase consideration when compared to the fair value of the net tangible and intangible assets acquired is recorded as goodwill. Determining the fair value of assets acquired and liabilities assumed requires significant judgment, including the amount and timing of expected future cash flows, long-term growth rates and discount rates. In some cases, the Company uses discounted cash flow analyses, which are based on estimates of future sales, earnings and cash flows after considering such factors as general market conditions, customer budgets, existing firm and future orders, changes in working capital, long term business plans and recent operating performance. If the initial accounting for the business combination is incomplete by the end of the reporting period in which the acquisition occurs, the business combination is recorded and disclosed on a preliminary basis. Subsequent to the acquisition date, and not later than one year from the acquisition date, adjustments to the initial preliminary recognized amounts are recorded to the extent new information is obtained about the measurement of assets and liabilities that existed as of the date of the acquisition.

The Company assesses goodwill for impairment annually as of the first day of the fourth quarter or more frequently if events or circumstances indicate that the fair value of a reporting unit that includes goodwill may be lower than its carrying value. The Company tests goodwill for impairment by performing a qualitative assessment or quantitative test at the reporting unit level. In performing a qualitative assessment, the Company evaluates company-specific, market and industry, economic, and other relevant factors that may impact the fair value of reporting units or the carrying value of the net assets of the respective reporting unit. If it is determined that it is more likely than not that the carrying value of the net assets is more than the fair value of the respective reporting unit, then a quantitative test is performed, the Company may in any event opt to bypass the qualitative assessment at the annual assessment date and perform a quantitative assessment. Where the quantitative test is used, the Company compares the carrying value of net assets to the estimated fair value of the respective reporting unit. If the fair value is determined to be less than carrying value, a goodwill impairment loss is recognized for the amount that the carrying amount of the reporting unit, including goodwill, exceeds its fair value, limited to the total amount of goodwill allocated to that reporting unit.

Derivative Instruments and Hedging Activity
The Company uses derivative financial instruments to manage the economic impact of fluctuations in currency exchange rates and interest rates. Derivative financial instruments are recognized on the balance sheet as either assets or liabilities and are measured at fair value. Changes in fair value of derivatives are recorded each period in earnings or accumulated other comprehensive income, depending on whether the Company elected hedge accounting and whether a derivative is effective as part of a hedge transaction, and if it is, the type of hedge transaction. Gains and losses on derivative instruments reported in other comprehensive income are subsequently included in earnings in the periods in which earnings are affected by the hedged item or when the hedge is no longer effective. Cash flows associated with the Company’s derivatives are presented as a component of the operating section of the statement of cash flows. The use of derivatives has generally been limited to interest rate swaps and foreign currency forward contracts. The Company enters into foreign currency forward contracts to reduce the risks associated with the changes in foreign exchange rates on sales and cost of sales denominated in currencies other than the entities’ functional currency. See Note 15, Derivative and Hedging Activities.
Fair Value of Financial Instruments
Financial instruments are measured in accordance with FASB authoritative guidance related to fair value measurements. This guidance clarifies the definition of fair value, prescribes methods for measuring fair value, establishes a fair value hierarchy based on the inputs used to measure fair value, and expands disclosures about fair value measurements. See Note 14, Fair Value Measurements.
Income Taxes
Income taxes are accounted for in accordance with FASB authoritative guidance on accounting for income taxes. Deferred income tax assets and liabilities are recognized for the future income tax consequences attributable to differences between the financial statement carrying amounts for existing assets and liabilities and their respective tax bases. Tax rate changes impacting these assets and liabilities are recognized in the period during which the rate change occurs.
Deferred tax assets are periodically evaluated to determine their recoverability and whether or not a valuation allowance is necessary. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. When determining the amount of net deferred tax assets that are more likely than not to be realized, the Company assesses all available positive and negative evidence. The weight given to the positive and negative evidence is commensurate with the extent to which the evidence may be objectively verified.
This assessment is completed on a taxing jurisdiction and entity filing basis. Based on these criteria and the relative weighting of both the positive and negative evidence available, and in particular the activity surrounding the Company’s prior earnings history including the forward losses previously recognized in the U.S. and U.K., management determined that it was necessary to establish a valuation allowance against nearly all of its net U.S. and U.K. deferred tax assets at December 31, 2020. This determination was made as the Company entered into a U.S. cumulative loss position during the first half of 2021, as prior period positive earnings fell outside of the three-year measurement period. Additionally, entities of the U.K. operations are in cumulative loss positions after the inclusion of 2020 and 2021 losses and the Company anticipates that all U.K. entities will be in cumulative loss positions during the first half of 2022. Once a company anticipates a cumulative three year loss position, there is a presumption that a company should no longer rely solely on projected future income in determining whether the deferred tax asset is more likely than not to be realized.
The Company records income tax provision or benefit based on the net income earned or net loss incurred in each tax jurisdiction and the tax rate applicable to that income or loss. In the ordinary course of business, there are transactions for which the ultimate tax outcome is uncertain. These uncertainties are accounted for in accordance with FASB authoritative guidance on accounting for the uncertainty in income taxes. The final tax outcome for these matters may be different than management's original estimates made in determining the income tax provision. A change to these estimates could impact the effective tax rate and net income or loss in subsequent periods. The Company uses the flow-through accounting method for tax credits. Under this method, tax credits reduce income tax expense. See Note 20, Income Taxes, for further discussion.
Stock-Based Compensation and Other Share-Based Payments
Many of the Company’s employees are participants in the Omnibus Incentive Plan of 2014 (as amended, the “Omnibus Plan”). The expense attributable to the Company’s employees is recognized over the period the amounts are earned and vested, as described in Note 19, Stock Compensation. The expense includes an estimate of expected forfeitures, based on historical forfeiture trends.
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New Accounting Pronouncements (Notes)
 12 Months Ended
Dec. 31, 2021
New Accounting Pronouncements [Abstract]  
New Accounting Pronouncements, Policy [Policy Text Block]
4.  New Accounting Pronouncements

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”), which provides temporary optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022, and an entity may elect to apply ASU 2020-04 for contract modifications by Topic or Industry Subtopic as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020, up to the date that the financial statements are available to be issued. An entity may elect to apply ASU 2020-04 to eligible hedging relationships
existing as of the beginning of the interim period that includes March 12, 2020, and to new eligible hedging relationships entered into after the beginning of the interim period that includes March 12, 2020. The Company is currently evaluating the potential impact of adopting this guidance on our consolidated financial statements.
v3.22.0.1
Accounts Receivable, net
 12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Accounts Receivable, net Accounts Receivable, net
Accounts receivable represent the Company’s unconditional rights to consideration, subject to the payment terms of the contract, for which only the passage of time is required before payment. Unbilled receivables are reflected under contract assets on the balance sheet. Beginning January 1, 2020, management assesses and records an allowance for credit losses using a current expected credit loss ("CECL") model. See Allowance for Credit Losses, below.
Accounts receivable, net consists of the following:
December 31,
2021		December 31,
2020
Trade receivables$412.0 $458.9 
Other58.1 31.1 
Less: allowance for credit losses(8.5)(5.6)
Accounts receivable, net$461.6 $484.4 
_______________________________________

Other receivables as of December 31, 2021 in the table above includes an amount related to the Department of Transportation’s approval of the Company’s grant claim filed under the Aviation Manufacturing Jobs Protection Program, a component of the American Rescue Plan Act of 2021. As of December 31, 2021, the Company has received payment for $37.8 of the total amount approved of $75.5. The remaining $37.7, recorded in Other receivables above, is to be received through the term of the agreement, which expires in March 2022. This program provides funding for a portion of the compensation costs of certain categories of employees for up to six months. In return, the Company is required to make several commitments, including a commitment that the Company will not involuntarily furlough or lay off employees within that employee group during the same six-month period. If the Company fails to comply with the program requirements, future payments may be withheld and/or a refund of payments already received may be required. The full amount of the award, less the $41.1 which has been amortized against Cost of sales on the Consolidated Statements of Operations through December 31, 2021, is recorded on the Consolidated Balance Sheets line item Deferred revenue and other deferred credits, short-term.

The Company has agreements (through its subsidiaries) to sell, on a revolving basis, certain trade accounts receivable balances with Boeing, Airbus Group SE and its affiliates (collectively, “Airbus”), and Rolls-Royce PLC and its affiliates (collectively, “Rolls-Royce”) to third party financial institutions. These programs were primarily entered into as a result of customers seeking payment term extensions with the Company and they continue to allow the Company to monetize the receivables prior to their payment date, subject to payment of a discount. No guarantees are delivered under the agreements. The Company's ability to continue using such agreements is primarily dependent upon the strength of the applicable customer’s financial condition. Transfers under these agreement are accounted for as sales of receivables resulting in the receivables being derecognized from the Company's balance sheet. For the twelve months ended December 31, 2021, $2,057.3 of accounts receivable have been sold via this arrangement. The proceeds from these sales of receivables are included in cash from operating activities in the Consolidated Statements of Cash Flows. The recorded net loss on sale of receivables is $6.7 for the year ended December 31, 2021 and is included in Other (expense) income. See Note 23, Other Income (Expense), net.
Allowance for Credit Losses
Beginning January 1, 2020, management assesses and records an allowance for credit losses on financial assets within the scope of ASU 2016-13 using the CECL model. Prior periods allowance for credit losses were based on a review of outstanding receivables that are charged off against the allowance after the potential for recovery is considered remote in accordance with legacy GAAP. The amount necessary to adjust the allowance for credit losses to management’s current estimate, as of the reporting date, on these assets is recorded in net income as credit loss expense. All credit losses reported in accordance with ASU 2016-13 were on trade receivables and/or contract assets arising from the Company’s contracts with customers.

In determining the appropriate methodology to use within the CECL model for receivables and contract assets arising from the Company’s contracts with customers, the Company considered the risk characteristics of the applicable assets. The Company segregated the trade receivables and contract assets into “pools” of assets at the segment level. The Company's assessment was based on similarity of risk characteristics shared by these pool of assets. Management observed that risks for collectability, with regard to the trade receivables and contract assets resulting from contracts with customers include: macro level economic conditions that impact all of the Company's customers, macro level market conditions that could impact the Company's customers in certain aircraft categories, certain customer specific market conditions, certain customer specific economic conditions, and certain customer specific administrative conditions.

The Company selected a loss-rate method for the CECL model, based on the relationship between historical write-offs of receivables and the underlying sales. Utilizing this model, a loss-rate is applied against the cost of applicable assets, at the time the asset is established. The loss rate reflects the Company’s current estimate of the risk of loss (even when that risk is remote) over the expected life of the assets. The Company's policy is to deduct write-offs from the allowance for credit losses account in the period in which the financial assets are deemed uncollectible.

The changes to the allowance for credit losses and related credit loss expense reported for the twelve months ended December 31, 2021 were solely based on the results of the CECL model. During the twelve months ended December 31, 2021, management updated the pools of assets used in the CECL model to reflect the Company's new segments. Other than this change there have been no significant changes in the factors that influenced management’s current estimate of expected credit losses, nor changes to the Company’s accounting policies or Current Expected Credit Losses methodology. The beginning balances, current period activity, and ending balances of the allocation for credit losses on accounts receivable and contract assets were not material.
Credit Loss, Financial Instrument
Beginning January 1, 2020, management assesses and records an allowance for credit losses on financial assets within the scope of ASU 2016-13 using the CECL model. Prior periods allowance for credit losses were based on a review of outstanding receivables that are charged off against the allowance after the potential for recovery is considered remote in accordance with legacy GAAP. The amount necessary to adjust the allowance for credit losses to management’s current estimate, as of the reporting date, on these assets is recorded in net income as credit loss expense. All credit losses reported in accordance with ASU 2016-13 were on trade receivables and/or contract assets arising from the Company’s contracts with customers.

In determining the appropriate methodology to use within the CECL model for receivables and contract assets arising from the Company’s contracts with customers, the Company considered the risk characteristics of the applicable assets. The Company segregated the trade receivables and contract assets into “pools” of assets at the segment level. The Company's assessment was based on similarity of risk characteristics shared by these pool of assets. Management observed that risks for collectability, with regard to the trade receivables and contract assets resulting from contracts with customers include: macro level economic conditions that impact all of the Company's customers, macro level market conditions that could impact the Company's customers in certain aircraft categories, certain customer specific market conditions, certain customer specific economic conditions, and certain customer specific administrative conditions.

The Company selected a loss-rate method for the CECL model, based on the relationship between historical write-offs of receivables and the underlying sales. Utilizing this model, a loss-rate is applied against the cost of applicable assets, at the time the asset is established. The loss rate reflects the Company’s current estimate of the risk of loss (even when that risk is remote) over the expected life of the assets. The Company's policy is to deduct write-offs from the allowance for credit losses account in the period in which the financial assets are deemed uncollectible.

The changes to the allowance for credit losses and related credit loss expense reported for the twelve months ended December 31, 2021 were solely based on the results of the CECL model. During the twelve months ended December 31, 2021, management updated the pools of assets used in the CECL model to reflect the Company's new segments. Other than this change there have been no significant changes in the factors that influenced management’s current estimate of expected credit losses, nor changes to the Company’s accounting policies or Current Expected Credit Losses methodology. The beginning balances, current period activity, and ending balances of the allocation for credit losses on accounts receivable and contract assets were not material.
v3.22.0.1
Contract with customer, asset and liability (Notes)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
contract with customer, asset and liability [Text Block]
Contract assets primarily represent revenues recognized for performance obligations that have been satisfied but for which amounts have not been billed. Contract assets, current are those for which performance obligations have been fully satisfied and billing is expected within 12 months of contract origination and contract assets, long-term are fully satisfied obligations that are expected to be billed in more than 12 months. No impairments to contract assets were recorded for the twelve months ended December 31, 2021 or December 31, 2020. See also Note 6, Accounts Receivable, net.

Contract liabilities are established for cash received that is in excess of revenues recognized and are contingent upon the satisfaction of performance obligations. Contract liabilities primarily consist of cash received on contracts for which revenue has been deferred since the receipts are in excess of transaction price resulting from the allocation of consideration based on relative standalone selling price to future units (including those under option that the Company believes are likely to be exercised) with prices that are lower than standalone selling price. These contract liabilities will be recognized earlier if the options are not fully exercised, or immediately, if the contract is terminated prior to the options being fully exercised.

December 31, 2021December 31, 2020Change
Contract assets$443.2 $372.8 $70.4 
Contract liabilities(387.0)(469.6)82.6 
Net contract assets (liabilities)$56.2 $(96.8)$153.0 

For the period ended December 31, 2021, the increase in contract assets reflects the net impact of additional revenue recognized in excess of billed revenues during the period. The decrease in contract liabilities reflects the net decrease of
deferred revenues recorded in excess of revenue recognized during the period. The Company recognized $192.4 of revenue that was included in the contract liability balance at the beginning of the period.

December 31, 2020December 31, 2019Change
Contract assets$372.8 $534.7 $(161.9)
Contract liabilities(469.6)(514.6)45.0 
Net contract assets (liabilities)$(96.8)$20.1 $(116.9)

For the period ended December 31, 2020, the decrease in contract assets reflects the net impact of decreases in revenue recognized in excess of billed revenues during the period. The decrease in contract liabilities reflects the net decrease of deferred revenues recorded in excess of revenue recognized during the period. The Company recognized $118.2 of revenue that was included in the contract liability balance at the beginning of the period.
v3.22.0.1
Revenue Disaggregation and Outstanding Performance Obligations (Notes)
 12 Months Ended
Dec. 31, 2021
Revenue, Performance Obligation [Abstract]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] 8.  Revenue Disaggregation and Outstanding Performance Obligations
Disaggregation of Revenue
The Company disaggregates revenue based on the method of measuring satisfaction of the performance obligation either over time or at a point in time. Additionally, the Company disaggregates revenue based upon the location where products and services are transferred to the customer, and based upon major customer. The Company’s principal operating segments and related revenue are noted in Note 26, Segment and Geographical Information.

The following table disaggregates revenues by the method of performance obligation satisfaction:

 For the Twelve Months Ended
RevenueDecember 31,
2021		December 31,
2020
Contracts with performance obligations satisfied over time$3,040.3 $2,188.4 
Contracts with performance obligations satisfied at a point in time912.7 1,216.4 
Total Revenue$3,953.0 $3,404.8 

The following table disaggregates revenue by major customer:
For the Twelve Months Ended
CustomerDecember 31,
2021		December 31,
2020
Boeing$2,206.0 $2,043.8 
Airbus945.6 773.3 
Other801.4 587.7 
Total net revenues$3,953.0 $3,404.8 


The following table disaggregates revenue based upon the location where control of products are transferred to the customer:
For the Twelve Months Ended
LocationDecember 31,
2021		December 31,
2020
United States$2,822.2 $2,637.6 
International 
United Kingdom580.4 433.5 
Other550.4 333.7 
Total International1,130.8 767.2 
Total Revenue$3,953.0 $3,404.8 

Remaining Performance Obligations
Unsatisfied, or partially unsatisfied, performance obligations currently under contract that are expected to be recognized to revenue in the future are noted in the table below. The Company expects options to be exercised in addition to the amounts presented below.

2022202320242025 and After
Unsatisfied performance obligations$3,472.2$4,293.3$2,934.7$614.4
v3.22.0.1
Inventory
 12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventory Inventory
Inventory consists of raw materials used in the production process, work-in-process, which is direct material, direct labor, overhead, and capitalized preproduction costs. Raw materials are stated at lower of cost (principally on an actual or average cost basis) or net realizable value. Capitalized pre-production costs include certain contract costs, including applicable overhead, incurred before a product is manufactured on a recurring basis. These costs are typically amortized over a period that is consistent with the satisfaction of the underlying performance obligations to which these relate. See Note 3, Summary of Significant Accounting Policies - Inventory.
December 31, 2021December 31, 2020
Raw materials$301.4 $337.3 
Work-in-process(1)
999.1 1,000.6 
Finished goods56.9 58.1 
Product inventory1,357.4 1,396.0 
Capitalized pre-production25.2 26.3 
Total inventory, net$1,382.6 $1,422.3 
_______________________________________
Product inventory, summarized in the table above, is shown net of valuation reserves of $54.9 and $56.8 as of December 31, 2021 and December 31, 2020, respectively.

(1)Work-in-process inventory includes direct labor, direct material, and overhead on contracts for which revenue is recognized at a point in time, as well as sub-assembly parts that have not been issued to production on contracts for which revenue is recognized over time using the input method. For the periods ended December 31, 2021 and December 31, 2020, work-in-process inventory includes $381.2 and $351.2, respectively, of costs incurred in anticipation of specific contracts and no impairments were recorded in the period.

Excess capacity and abnormal production costs are excluded from inventory and recognized as expense in the period incurred. Cost of sales for the twelve months ended December 31, 2021 includes $217.5 of excess capacity production costs related to
temporary B737 MAX, A220, and A320 production schedule changes. Cost of sales also includes costs abnormal costs related to workforce adjustments as a result of COVID-19 production pause, net of U.S. employee retention credit and U.K. government subsidies for the twelve months ended December 31, 2021 of $12.0. Cost of sales for the twelve months ended December 31, 2020 includes $278.9 of excess capacity production costs related to temporary B737 MAX, A220, and A320 production schedule changes, $33.7 related to temporary workforce adjustments as a result of COVID-19 production pause, net of the U.S. employee retention credit and U.K. government subsidies of approximately $21.4.
v3.22.0.1
Property, Plant and Equipment, net
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net
Property, plant and equipment, net consists of the following:
December 31, 2021December 31, 2020
Land$30.7 $30.8 
Buildings (including improvements)1,242.0 1,166.7 
Machinery and equipment2,276.5 2,120.5 
Tooling1,051.1 1,036.1 
Capitalized software323.0 282.5 
Construction-in-progress117.1 220.0 
Total5,040.4 4,856.6 
Less: accumulated depreciation(2,654.9)(2,352.8)
Property, plant and equipment, net$2,385.5 $2,503.8 

Capitalized interest was $6.1, $5.0, and $6.5 for the twelve months ended December 31, 2021, 2020 and 2019, respectively. Repair and maintenance costs are expensed as incurred. The Company recognized repair and maintenance costs of $158.8, $119.7, and $142.2 for the twelve months ended December 31, 2021, 2020 and 2019, respectively.
The Company capitalizes certain costs, such as software coding, installation and testing, that are incurred to purchase or to create and implement internal use computer software. Depreciation expense related to capitalized software was $16.7, $16.1, and $17.7 for the twelve months ended December 31, 2021, 2020, and 2019, respectively.
The Company reviews capital and amortizing intangible assets (long-lived assets) for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable.  For the twelve months ended December 31, 2021, there was no impairment. During the twelve months ended December 31, 2020, the Company disposed of long-lived assets with a net book value of $19.2 and $3.7 related to production decreases, process-related changes and quality improvement initiatives on the B787 and A350 programs, respectively. By segment, the disposal charge of $22.9 was related to the Commercial segment, and is included as a separate line item of the operating loss in the Consolidated Statements of Operations for the period.
v3.22.0.1
Leases (Notes)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Lessee, Leases [Policy Text Block]
The Company determines if an arrangement is a lease at the inception of a signed agreement. Operating leases are included in ROU assets (long-term), short-term operating lease liabilities, and long-term operating lease liabilities on the Company’s consolidated balance sheet. Finance leases are included in Property, Plant and Equipment, current portion of long-term debt, and long-term debt.
ROU assets represent the right of the Company to use an underlying asset for the length of the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term.
To determine the present value of lease payments, the Company uses its estimated incremental borrowing rate or the implicit rate, if readily determinable. The estimated incremental borrowing rate is based on information available at the lease
commencement date, including any recent debt issuances and publicly available data for instruments with similar characteristics. The ROU asset also includes any lease payments made and excludes lease incentives.
The Company's lease terms may include options to extend or terminate the lease and, when it is reasonably certain that an option will be exercised, those options are included in the net present value calculation. Leases with a term of 12 months or less, which are primarily related to automobiles and manufacturing equipment, are not recorded on the balance sheet. The aggregate amount of lease cost for leases with a term of 12 months or less is not material.
The Company has lease agreements that include lease and non-lease components, which are generally accounted for separately. For certain leases (primarily related to IT equipment), the Company does account for the lease and non-lease components as a single lease component. A portfolio approach is applied to effectively account for the assets and liabilities for those specific leases referenced above. The Company does not have any material leases containing variable lease payments or residual value guarantees. The Company also does not have any material subleases.
The Company currently has operating and finance leases for items such as manufacturing facilities, corporate offices, manufacturing equipment, transportation equipment, and vehicles. Majority of the Company's active leases have remaining lease terms that range between less than one year to 18 years, some of which include options to extend the leases for up to 30 years, and some of which include options to terminate the leases within one year.
Lessee Disclosure [Abstract]  
Lessee, Finance Leases
For the twelve months ended December 31, 2021, total net lease cost was $47.3. This was comprised of $11.5 of operating lease costs, $28.8 amortization of assets related to finance leases, and $7.0 interest on finance lease liabilities. For the twelve months ended December 31, 2020, total net lease cost was $36.8. This was comprised of $9.0 of operating lease costs, $21.5 amortization of assets related to finance leases, and $6.3 interest on finance lease liabilities. For the twelve months ended December 31, 2019, total net lease cost was $25.1. This was comprised of $9.0 of operating lease costs, $13.1 of amortization of assets related to finance leases, and $3.0 interest on finance lease liabilities.

Supplemental cash flow information related to leases was as follows:
For the Twelve Months EndedFor the Twelve Months Ended
December 31, 2021December 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$10.9 $8.7 
Operating cash flows from finance leases$7.0 $6.3 
Financing cash flows from finance leases$40.9 $30.1 
ROU assets obtained in exchange for lease obligations:
Operating leases$20.8 $28.5 
Supplemental balance sheet information related to leases:
December 31, 2021December 31, 2020
Finance leases:
Property and equipment, gross$266.1 $214.2 
Accumulated amortization(73.1)(45.1)
Property and equipment, net$193.0 $169.1 

The weighted average remaining lease term as of December 31, 2021 for operating and finance leases was 36.3 years and 4.9 years, respectively. The weighted average discount rate as of December 31, 2021 for operating and finance leases was 5.6% and 4.5%, respectively. See Note 16, Debt, for current and non-current finance lease obligations. The weighted average remaining lease term as of December 31, 2020 for operating and finance leases was 42.3 years and 5.5 years, respectively. The weighted average discount rate as of December 31, 2020 for operating and finance leases was 5.5% and 4.3%, respectively.
As of December 31, 2021, remaining maturities of lease liabilities were as follows:
202220232024202520262027 and thereafterTotal Lease PaymentsLess: Imputed InterestTotal Lease Obligations
Operating Leases$12.4 $11.7 $11.2 $10.6 $8.8 $168.8 $223.5 $(136.5)$87.0 
Financing Leases$48.3 $43.0 $34.7 $22.9 $15.8 $19.8 $184.5 $(19.4)$165.1 
As of December 31, 2021, the Company had additional operating and financing lease commitments that have not yet commenced of approximately $0.3 and $35.1, respectively, for manufacturing equipment and facilities which are in various phases of construction or customization for the Company's ultimate use, with lease terms between 3 and 15 years. The Company's involvement in the construction and design process for these assets is generally limited to project management.
Lessee, Operating Leases
For the twelve months ended December 31, 2021, total net lease cost was $47.3. This was comprised of $11.5 of operating lease costs, $28.8 amortization of assets related to finance leases, and $7.0 interest on finance lease liabilities. For the twelve months ended December 31, 2020, total net lease cost was $36.8. This was comprised of $9.0 of operating lease costs, $21.5 amortization of assets related to finance leases, and $6.3 interest on finance lease liabilities. For the twelve months ended December 31, 2019, total net lease cost was $25.1. This was comprised of $9.0 of operating lease costs, $13.1 of amortization of assets related to finance leases, and $3.0 interest on finance lease liabilities.

Supplemental cash flow information related to leases was as follows:
For the Twelve Months EndedFor the Twelve Months Ended
December 31, 2021December 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$10.9 $8.7 
Operating cash flows from finance leases$7.0 $6.3 
Financing cash flows from finance leases$40.9 $30.1 
ROU assets obtained in exchange for lease obligations:
Operating leases$20.8 $28.5 
Supplemental balance sheet information related to leases:
December 31, 2021December 31, 2020
Finance leases:
Property and equipment, gross$266.1 $214.2 
Accumulated amortization(73.1)(45.1)
Property and equipment, net$193.0 $169.1 

The weighted average remaining lease term as of December 31, 2021 for operating and finance leases was 36.3 years and 4.9 years, respectively. The weighted average discount rate as of December 31, 2021 for operating and finance leases was 5.6% and 4.5%, respectively. See Note 16, Debt, for current and non-current finance lease obligations. The weighted average remaining lease term as of December 31, 2020 for operating and finance leases was 42.3 years and 5.5 years, respectively. The weighted average discount rate as of December 31, 2020 for operating and finance leases was 5.5% and 4.3%, respectively.
As of December 31, 2021, remaining maturities of lease liabilities were as follows:
202220232024202520262027 and thereafterTotal Lease PaymentsLess: Imputed InterestTotal Lease Obligations
Operating Leases$12.4 $11.7 $11.2 $10.6 $8.8 $168.8 $223.5 $(136.5)$87.0 
Financing Leases$48.3 $43.0 $34.7 $22.9 $15.8 $19.8 $184.5 $(19.4)$165.1 
As of December 31, 2021, the Company had additional operating and financing lease commitments that have not yet commenced of approximately $0.3 and $35.1, respectively, for manufacturing equipment and facilities which are in various phases of construction or customization for the Company's ultimate use, with lease terms between 3 and 15 years. The Company's involvement in the construction and design process for these assets is generally limited to project management.
v3.22.0.1
Other Assets
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Assets
Other current assets are summarized as follows:
December 31,
2021		December 31,
2020
Prepaid expenses20.7 16.3 
Income tax receivable(1)
14.0 315.3 
Other assets- short term5.0 4.7 
Total other current assets$39.7 $336.3 
Other assets are summarized as follows:
December 31,
2021		December 31,
2020
Deferred financing 
Deferred financing costs0.9 0.9 
Less: Accumulated amortization-deferred financing costs(0.6)(0.5)
Deferred financing costs, net0.3 0.4 
Other 
Supply agreements (2)
9.2 11.4 
Equity in net assets of affiliates0.8 3.1 
Restricted cash - collateral requirements19.5 19.5 
Rotables38.3 35.1 
Other23.5 14.1 
Total$91.6 $83.6 
_______________________________________

(1) Decrease in income tax receivable is a result of $300 refund received in 2021 from 2020 NOL carryback claim.

(2) Certain payments accounted for as consideration paid by the Company to a customer are being amortized as reductions to net revenues.
Goodwill Disclosure
Goodwill is summarized as follows:

Changes in Goodwill Balance
Balance atBalance at
SegmentDecember 31,
2020		AcquisitionsAdjustments/OtherCurrency ExchangeDecember 31,
2021
Commercial$67.9 $— $228.8 $0.1 $296.8 
Defense & Space$5.5 $— $— $— $5.5 
Aftermarket$5.1 $18.1 
(2)
$298.2 $— $321.4 
Not Allocated$486.8 
(1)
$— $(486.8)
(1)
$— $— 
$565.3 $18.1 $40.2 
(3)
$0.1 $623.7 


(1) The Bombardier Acquisition (as defined below in Note 28, Acquisitions) on October 30, 2020 resulted in the establishment of $486.8 of goodwill that was included in the balance reported at December 31, 2020, which, given the preliminary nature of the Bombardier Acquisition purchase price allocation, had not yet been allocated to the relevant reportable segments. The amount was subsequently allocated and is included in the segments noted above. See also Note 28, Acquisitions.

(2) Goodwill related to the acquisition of the assets of Applied Aerodynamics, Inc. ("Applied") during the three months ended July 1, 2021 resulted in the establishment of $17.4 of goodwill that was included in the balance reported at July 2, 2021. As a result of certain purchase price allocation adjustments recorded during the purchase price accounting measurement period based on additional information obtained, the goodwill resulting from the Applied acquisition was adjusted by $0.7 to $18.1 as of December 31, 2021. See Note 28, Acquisitions.

(3)    As a result of certain purchase price allocation adjustments recorded during the purchase price accounting measurement period based on additional information obtained, the goodwill resulting from the Bombardier Acquisition was adjusted by $40.2, from $486.8 that was reported at December 31, 2020, to $527.0 as of December 31, 2021. See also Note 28, Acquisitions.
The total goodwill value includes no accumulated impairment loss in any of the periods presented. The Company assesses goodwill for impairment annually in the fourth quarter or more frequently if events or circumstances indicate that the fair value of a reporting unit that includes goodwill may be lower than its carrying value. We test goodwill for impairment by performing a qualitative assessment or quantitative test at the reporting unit level. In performing a qualitative assessment, we evaluate company-specific, market and industry, economic, and other relevant factors that may impact the fair value of our reporting units or the carrying value of the net assets of the respective reporting unit. If we determine that it is more likely than not that the carrying value of the net assets is more than the fair value of the respective reporting unit, then a quantitative test is performed. Where the quantitative test is used, we compare the carrying value of net assets to the estimated fair value of the respective reporting unit. If the fair value is determined to be less than carrying value, a goodwill impairment loss is recognized for the amount that the carrying amount of the reporting unit, including goodwill, exceeds its fair value, limited to the total amount of goodwill allocated to that reporting unit.
v3.22.0.1
Advance Payments and Deferred Revenue/Credits
 12 Months Ended
Dec. 31, 2021
Advance Payments And Deferred Revenue Credits [Abstract]  
Advance Payments And Deferred Revenue/Credits Advances on the B787 Program.  Boeing has made advance payments to Spirit under the B787 Special Business Provisions and General Terms Agreement (collectively, the "B787 Supply Agreement"), that are required to be repaid to Boeing by way of offset against the purchase price for future shipset deliveries. Advance repayments were originally scheduled to be spread evenly over the remainder of the first 1,000 B787 shipsets delivered to Boeing. On April 8, 2014, the Company signed a memorandum of agreement with Boeing that suspended advance repayments related to the B787 program for a period of twelve months beginning April 1, 2014. Repayment recommenced on April 1, 2015, and any repayments that otherwise would have become due during such twelve-month period were to offset the purchase price for shipsets 1001 through 1120. On December 21, 2018, the Company signed the 2018 MOA with Boeing that again suspended the advance repayments beginning with line unit 818. The advance repayments will resume at a lower rate of $0.45 per shipset at line number 1135 and continue through line number 1605.
In the event Boeing does not take delivery of a sufficient number of shipsets to repay the full amount of advances prior to the termination of the B787 program or the B787 Supply Agreement, any advances not then repaid will be applied against any outstanding payments then due by Boeing to us, and any remaining balance will be repaid in annual installments of $27.0 due on December 15th of each year until the advance payments have been fully recovered by Boeing. As of December 31, 2021, the amount of advance payments received by us from Boeing and not yet repaid was approximately $212.1.

Advances on the B737 Program. In an effort to minimize the disruption to Spirit's operations and its supply chain, the 2019 MOA entered into on April 12, 2019 included the terms and conditions for an advance payment to be made from Boeing to Spirit in the amount of $123, which was received during the third quarter of 2019. The 2020 MOA entered into on February 6, 2020, extended the repayment date of the $123, advance received by Spirit under the 2019 MOA to 2022. The 2020 MOA also required Boeing to pay $225 to Spirit in the first quarter of 2020, consisting of (i) $70 in support of Spirit’s inventory and production stabilization, of which $10 was repaid by Spirit in 2021, and (ii) $155 as an incremental pre-payment for costs and shipset deliveries over the next two years. On February 9, 2021, Spirit signed a letter of agreement for Boeing to pay $38.5 to Spirit in the first quarter of 2021, which consisted of (i) $68.5 as additional pre-payment for the costs and shipset deliveries less the (ii) ($30) credit owed to Boeing for rate-based pricing premium. As of December 31, 2021, the amount of advance payments received from Boeing and not yet repaid was $123.
v3.22.0.1
Fair Value Measurements
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The FASB’s authoritative guidance on fair value measurements defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. It also establishes a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance discloses three levels of inputs that may be used to measure fair value:

Level 1 Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market.

Level 2                 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. Observable inputs, such as current and forward interest rates and foreign exchange rates, are used in determining the fair value of the interest rate swaps and foreign currency hedge contracts.
 
Level 3             Unobservable inputs that are supported by little or no market activity and are significant to the fair value of assets and liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

The Company’s long-term debt includes a senior secured term loan and senior notes.  The estimated fair value of the Company’s debt obligations is based on the quoted market prices for such obligations or the historical default rate for debt with similar credit ratings. The following table presents the carrying amount and estimated fair value of long-term debt:
 December 31, 2021 December 31, 2020 
 Carrying
Amount		Fair
Value		 Carrying
Amount		Fair
Value		 
Senior secured term loan B (including current portion)595.2 595.2 
(2)
389.6 395.0 
(2)
Floating rate notes— — 299.7 297.5 
(1)
Senior notes due 2023299.3 303.6 
(1)
298.8 293.8 
(1)
Senior secured first lien notes due 2025495.3 513.3 
(1)
493.9 521.2 
(1)
Senior secured second lien notes due 20251,187.5 1,252.4 
(1)
1,184.2 1,279.1 
(1)
Senior notes due 2026298.4 307.5 
(1)
298.1 313.9 
(1)
Senior notes due 2028695.2 697.4 
(1)
694.6 689.2 
(1)
Total$3,570.9 $3,669.4  $3,658.9 $3,789.7  
_______________________________________

(1)Level 1 Fair Value hierarchy
(2)Level 2 Fair Value hierarchy
See also Note 15, Derivative and Hedging Activities.
v3.22.0.1
Derivative and Hedging Activities
 12 Months Ended
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative and Hedging Activities Derivative and Hedging Activities
Derivatives Accounted for as Hedges

Cash Flow Hedges - Interest Rate Swaps

The Company has traditionally entered into interest rate swap agreements to reduce its exposure to the variable rate portion of its long-term debt. The Company also considers counterparty credit risk and its own credit risk in its determination of all estimated fair values. During the third quarter of 2019, the Company entered into two interest rate swap agreements with a combined notional value of $450.0. These derivatives were designated as cash flow hedges by the Company. As of December 31, 2020, the Company had one interest rate swap agreement, designated as cash flow hedge, with a notional value of $150. The fair value of these hedges was a liability of $1.2 as of December 31, 2020, which is recorded in the other current liabilities line item on the Consolidated Balance Sheet for the respective period. On February 24, 2021, the Company terminated the remaining swap agreement. As of December 31, 2021, the Company had no swaps outstanding.

Changes in the fair value of cash flow hedges are recorded in Accumulated Other Comprehensive Income ("AOCI") and recorded in earnings in the period in which the hedged transaction occurs. No gain or loss was recognized in AOCI for the twelve months ended December 31, 2021. For the twelve months ended December 31, 2020 and 2019, the Company recorded a net loss in AOCI of $14.3 and $0.8, respectively. For the twelve months ended December 31, 2021, 2020 and 2019 a loss of $0.4, $3.6 and $0.1, respectively, was reclassified from AOCI to earnings, and included in the interest expense line item on the Consolidated Statements of Operations, and in operating activities on the Consolidated Statements of Cash Flows. For the twelve months ended December 31, 2021 and 2020, a loss of $0.7 and $10.4, respectively, was reclassified from AOCI to earnings resulting from the termination of a swap agreement, and included in the other income line item on the Consolidated Statements of Operations, and in operating activities on the Consolidated Statements of Cash Flows.

Cash Flow Hedges – Foreign Currency Hedge

The Company has entered into currency forward contracts, each designated as a cash flow hedge upon the date of execution, for the purpose of reducing the variability of cash flows and hedging against the foreign currency exposure for forecasted payroll, pension and vendor disbursements that are expected to be made in the British pound sterling. The hedging program implemented is intended to reduce foreign currency exposure, and the associated forward currency contracts hedge forecasted transactions through September 2022.
The following table summarizes the notional amounts (representing the gross contract/notional amount of the derivatives outstanding) and fair values of the derivative instruments in the Consolidated Balance Sheets as of December 31, 2021, and December 31, 2020. The foreign currency exchange contracts are measured within Level 1 of the Fair Value hierarchy. See Note 14, Fair Value Measurements.

Notional amountOther assetsOther liabilities
December 31, 2021December 31, 2020December 31, 2021December 31, 2020December 31, 2021December 31, 2020
Derivatives designated as hedging instruments:
Foreign currency exchange contracts$167.7 $— $— $— $2.0 $— 
Total derivatives at fair value$— $— $2.0 $— 



Changes in the fair value of cash flow hedges are recorded in AOCI and recorded in earnings in the period in which the hedged transaction settles. The gain (loss) recognized in AOCI associated with our hedging transactions is presented in the following table:
For the Twelve Months Ended
December 31,
2021		December 31,
2020		December 31,
2019
Recognized in total other comprehensive loss:
Foreign currency exchange contracts$(2.0)$— $— 

The following table summarizes the gains/(losses) associated with our hedging transactions reclassified from AOCI to earnings:

For the Twelve Months Ended
December 31,
2021		December 31,
2020		December 31,
2019
Foreign currency exchange contracts:
Other income (expense)$(0.2)$— $— 

Within the next 12 months, the Company expects to recognize a loss of $2.0 in earnings related to the foreign currency forward contracts. As of December 31, 2021, the maximum term of the hedged forecasted transaction was 9 months. Generally, the Company has agreements with its counterparties that contain a provision whereby if the Company defaults on its existing credit facilities and payment of the loans extended under such facilities is accelerated, the Company could be declared in default under its agreements, which may result in the early termination of the outstanding derivatives governed by such agreements and the payment of an early termination amount.


Derivatives Not Accounted for as Hedges
During the twelve months ended December 31, 2019, the Company recorded a net loss of $16.7 related to foreign currency forward contracts that were not designated as hedges. The loss was on foreign currency contracts that fully settled within the twelve months ended December 31, 2019, for which hedge accounting was not applied. There were no foreign currency forward contracts, other than those accounted for as cash flow hedges noted above, in existence as of December 31, 2021, December 31, 2020 or December 31, 2019.
v3.22.0.1
Debt
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Debt
Total debt shown on the balance sheet is comprised of the following:
December 31, 2021December 31, 2020
CurrentNoncurrentCurrentNoncurrent
Senior secured term loan B5.9 589.3 3.9 385.7 
Floating Rate Notes— — 299.7 — 
Senior notes due 2023— 299.3 — 298.8 
Senior secured first lien notes due 2025— 495.3 — 493.9 
Senior secured second lien notes due 2025— 1,187.5 — 1,184.2 
Senior notes due 2026— 298.4 — 298.1 
Senior notes due 2028— 695.2 — 694.6 
Present value of finance lease obligations42.2 122.9 35.3 121.5 
Other1.4 54.8 1.8 56.1 
Total$49.5 $3,742.7 $340.7 $3,532.9 

Credit Agreement

On October 5, 2020, Spirit entered into a term loan credit agreement (the “Credit Agreement”) providing for a $400.0 senior secured term loan B credit facility with the lenders party thereto and Bank of America, N.A., as administrative agent and collateral agent. On October 5, 2020 Spirit borrowed the full $400.0 of initial term loans available under the Credit Agreement. The Credit Agreement also permits Spirit to request one or more incremental term facilities in an aggregate principal amount not to exceed (x) in the case of any incremental facility that is secured on a pari passu basis with the Credit Agreement, the greater of (a) $950.0 and (b) such other amount, so long as on a pro forma basis after giving effect to the incurrence of such indebtedness and the use of proceeds thereof, the first lien secured net leverage ratio does not exceed 3.25 to 1.00; and (y) in the case of any incremental facility that is secured on a junior basis to the Credit Agreement, the greater of (a) $500.0 and (b) such other amount, so long as on a pro forma basis after giving effect to the incurrence of such indebtedness and the use of proceeds thereof, the secured net leverage ratio does not exceed 5.00 to 1.00. Borrowings under the Credit Agreement will be used for general corporate purposes. On November 15, 2021, the Company entered into a first refinancing, incremental assumption and amendment agreement (the “November 2021 Amendment”) to the Credit Agreement (the Credit Agreement as amended by the November 2021 Amendment, the “Amended Credit Agreement”). The November 2021 Amendment provides for, among other things, (i) the refinancing of the $397.0 aggregate principal amount of term loans outstanding under the Credit Agreement immediately prior to the effectiveness of the November 2021 Amendment (the “Existing Term Loans”) with term loans in an equal principal amount with a lower interest rate (the “Repriced Term Loans”) and (ii) an incremental term loan facility of $203.0 in aggregate principal amount with the same terms as the Repriced Term Loans (the "Incremental Term Loans" and, together with the Repriced Term Loans, the “Term Loans”). A portion of the proceeds of the Term Loans was used to refinance the Existing Term Loans, and the remainder will be used to fund payments to the government of the United Kingdom and/or for general corporate purposes, including the repayment or redemption of debt. The Term Loans will mature on January 15, 2025 and amortizes in equal quarterly installments at a rate of 1.00% per annum of the $600.0 principal amount thereof, with the remaining balance due at final maturity. Following the effectiveness of the November 2021 Amendment, the Term Loans bear interest, at Spirit’s option, of LIBOR plus an applicable margin (3.50% or 3.75%) or base rate plus an applicable margin (2.50% or 2.75%). The applicable margin is based on Spirit's first lien secured gross leverage ratio.

The obligations under the Amended Credit Agreement are guaranteed by Holdings and Spirit AeroSystems North Carolina, Inc., a wholly-owned subsidiary of the Company (“Spirit NC”), (collectively, the “Guarantors”) and each existing and future, direct and indirect, wholly-owned material domestic subsidiary of Spirit, subject to certain customary exceptions. The obligations are secured by a first-priority lien with respect to substantially all assets of Spirit and the Guarantors, subject to certain exceptions.
The Amended Credit Agreement contains usual and customary affirmative and negative covenants for facilities and transactions of this type and that, among other things, restrict the Company and its restricted subsidiaries’ ability to incur additional indebtedness, create liens, consolidate or merge, make acquisitions and other investments, guarantee obligations of third parties, make loans or advances, declare or pay certain dividends or distributions on the Company’s stock, redeem or repurchase shares of the Company’s stock, engage in transactions with affiliates and enter into agreements restricting the Company’s subsidiaries’ ability to pay dividends or dispose of assets. These covenants are subject to a number of qualifications and limitations.

The Amended Credit Agreement provides for customary events of default, including, but not limited to, failure to pay principal and interest, failure to comply with covenants, agreements or conditions, and certain events of bankruptcy or insolvency involving the Company and its material subsidiaries.

As of December 31, 2021, the outstanding balance of the Amended Credit Agreement was $598.5 and the carrying value was $595.2.

First Lien 2025 Notes

On October 5, 2020, Spirit entered into an Indenture (the “First Lien 2025 Notes Indenture”), by and among Spirit, the Guarantors, and The Bank of New York Mellon Trust Company, N.A., as trustee and collateral agent, in connection with Spirit’s offering of $500.0 aggregate principal amount of its 5.500% Senior Secured First Lien Notes due 2025 (the “First Lien 2025 Notes"). As of December 31, 2021, the outstanding balance of the First Lien 2025 Notes was $500.0 and the carrying value was $495.3.

The First Lien 2025 Notes were issued and sold in a private placement to qualified institutional buyers pursuant to Rule 144A under the U.S. Securities Act of 1933, as amended (the “Securities Act”), and in offshore transactions to non-U.S. persons pursuant to Regulation S under the Securities Act.

The First Lien 2025 Notes mature on January 15, 2025 and bear interest at a rate of 5.500% per year payable semiannually in cash in arrears on January 15 and July 15 of each year. The first interest payment date is January 15, 2021.

The First Lien 2025 Notes are guaranteed by the Guarantors and secured by certain real property and personal property, including certain equity interests, owned by Spirit and the Guarantors. The First Lien 2025 Notes and guarantees are Spirit’s and the Guarantors’ senior secured obligations and rank equally in right of payment with all of their existing and future senior indebtedness, effectively equal with their existing and future indebtedness secured on a pari passu basis by the collateral for the First Lien 2025 Notes to the extent of the value of the collateral (including the Amended Credit Agreement and the 2026 Notes), effectively senior to all of their existing and future indebtedness that is not secured by a lien, or is secured by a junior-priority lien, on the collateral for the First Lien 2025 Notes to the extent of the value of the collateral, effectively junior to any of their other existing and future indebtedness that is secured by assets that do not constitute collateral for the First Lien 2025 Notes to the extent of the value of such assets, and senior in right of payment to any of their existing and future subordinated indebtedness.

The First Lien 2025 Notes Indenture contains covenants that limit Spirit’s, the Company’s and the Company’s subsidiaries’ ability, subject to certain exceptions and qualifications, to incur indebtedness secured by liens, enter into sale and leaseback transactions, make restricted payments and investments and enter into certain mergers or consolidations and transfer substantially all of the Company and its subsidiaries’ assets. These covenants are subject to a number of qualifications and limitations. In addition, the First Lien 2025 Indenture provides for customary events of default.

2026 Notes

In June 2016, the Company issued $300.0 in aggregate principal amount of 3.850% Senior Notes due June 15, 2026 (the “2026 Notes”) with interest payable, in cash in arrears, on June 15 and December 15 of each year, beginning December 15, 2016. As of December 31, 2021, the outstanding balance of the 2026 Notes was $300.0 and the carrying value was $298.4. The Company and Spirit NC guarantee Spirit's obligations under the 2026 Notes on a senior secured basis.

On February 24, 2020, Spirit entered into a Second Supplemental Indenture (the “Second Supplemental Indenture”) by and among Spirit, the Company, Spirit NC, and The Bank of New York Mellon Trust Company, N.A. (the “Trustee”), as trustee in connection with the 2026 Notes. Under the Second Supplemental Indenture, the 2026 Noteholders were granted security on an
equal and ratable basis with the lenders under the 2018 Credit Agreement until the security in favor of the lenders under the 2018 Credit Agreement was released on October 5, 2020. The Supplemental Indenture also added Spirit NC as an additional guarantor under the indenture governing the 2026 Notes.

On April 17, 2020, Spirit entered into a Third Supplemental Indenture (the “Third Supplemental Indenture”), by and among Spirit, the Company, Spirit NC and The Bank of New York Mellon Trust Company, N.A., as trustee in connection with the 2026 Notes. Under the Third Supplemental Indenture, the noteholders were granted security on an equal and ratable basis with the holders of the Second Lien 2025 Notes.

On October 5, 2020, Spirit entered into a Fourth Supplemental Indenture (the “Fourth Supplemental Indenture”), by and among Spirit, the Company, Spirit NC and The Bank of New York Mellon Trust Company, N.A., as trustee in connection with 2026 Notes. Under the Fourth Supplemental Indenture, the holders of the 2026 Notes were granted security on an equal and ratable basis with the holders of the First Lien 2025 Notes and the secured parties under the Amended Credit Agreement.

Second Lien 2025 Notes

On April 17, 2020, Spirit entered into an Indenture (the “Second Lien 2025 Notes Indenture”), by and among Spirit, the Guarantors, and The Bank of New York Mellon Trust Company, N.A., as trustee and collateral agent, in connection with Spirit’s offering of $1,200.0 aggregate principal amount of its 7.500% Senior Secured Second Lien Notes due 2025 (the “Second Lien 2025 Notes”).

The Second Lien 2025 Notes were issued and sold in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act, and in offshore transactions to non-U.S. persons pursuant to Regulation S under the Securities Act.

The Second Lien 2025 Notes mature on April 15, 2025 and bear interest at a rate of 7.500% per year payable semiannually in cash in arrears on April 15 and October 15 of each year. The first interest payment date was October 15, 2020. As of December 31, 2021, the outstanding balance of the Second Lien 2025 Notes was $1,200.0 and the carrying value was $1,187.5.

The Second Lien 2025 Notes are guaranteed by the Guarantors and secured by certain real property and personal property, including certain equity interests, owned by Spirit and the Guarantors. The Second Lien 2025 Notes and guarantees are Spirit’s and the Guarantors’ senior secured obligations and will rank equally in right of payment with all of their existing and future senior indebtedness, effectively junior to all of their existing and future first-priority lien indebtedness to the extent of the value of the collateral securing such indebtedness (including indebtedness under the Amended Credit Agreement, the Second Lien 2025 Notes and the 2026 Notes), effectively junior to any of their other existing and future indebtedness that is secured by assets that do not constitute collateral for the Second Lien 2025 Notes to the extent of the value of such assets, and senior in right of payment to any of their existing and future subordinated indebtedness.

The Second Lien 2025 Notes Indenture contains covenants that limit Spirit’s, the Company’s and the Company’s subsidiaries’ ability, subject to certain exceptions and qualifications, to create liens, enter into sale and leaseback transactions and guarantee other indebtedness without guaranteeing the Notes. These covenants are subject to a number of qualifications and limitations. In addition, the Second Lien 2025 Notes Indenture provides for customary events of default.

Floating Rate, 2023, and 2028 Notes

On May 30, 2018, Spirit entered into an Indenture (the “2018 Indenture”) by and among Spirit, the Company and The Bank of New York Mellon Trust Company, N.A., as trustee in connection with Spirit’s offering of $300.0 aggregate principal amount of its Senior Floating Rate Notes due 2021 (the “Floating Rate Notes”), $300.0 aggregate principal amount of its 3.950% Senior Notes due 2023 (the “2023 Notes”) and $700.0 aggregate principal amount of its 4.600% Senior Notes due 2028 (the “2028 Notes” and, together with the Floating Rate Notes and the 2023 Notes, the “2018 Notes”). Holdings guaranteed Spirit’s obligations under the 2018 Notes on a senior unsecured basis.

The Floating Rate Notes bear interest at a rate per annum equal to three-month LIBOR, as determined in the case of the initial interest period, on May 25, 2018, and thereafter at the beginning of each quarterly period as described herein, plus 0.80 basis points and mature on June 15, 2021. Interest on the Floating Rate Notes is payable on March 15, June 15, September 15 and December 15 of each year, beginning on September 15, 2018. The 2023 Notes bear interest at a rate of 3.950% per annum and mature on June 15, 2023. The 2028 Notes bear interest at a rate of 4.600% per annum and mature on June 15, 2028. Interest on the 2023 Notes and 2028 Notes is payable on June 15 and December 15 of each year, beginning on December 15, 2018. On
February 24, 2021, Spirit redeemed the outstanding $300.0 principal amount of the Floating Rate Notes. The outstanding balance of the Floating Rate Notes, 2023 Notes, and 2028 Notes was $0.0, $300.0, and $700.0 as of December 31, 2021, respectively. The carrying value of the Floating Rate Notes, 2023 Notes, and 2028 Notes was 0.0, $299.3, and $695.2 as of December 31, 2021, respectively.

The 2018 Indenture contains covenants that limit Spirit’s, the Company’s and certain of the Company’s subsidiaries’ ability, subject to certain exceptions and qualifications, to create liens without granting equal and ratable liens to the holders of the 2018 Notes and enter into sale and leaseback transactions. These covenants are subject to a number of qualifications and limitations. In addition, the 2018 Indenture provides for customary events of default.

As of December 31, 2021, the Company was in compliance with all covenants contained in the indentures governing the First Lien 2025 Notes, Second Lien 2025 Notes, 2023 Notes, 2026 Notes, and the 2028 Notes.

The following table shows required payments during the next five years on the term loan and notes outstanding at December 31, 2021. See Note 11, Leases for maturities of finance lease obligations.
20222023202420252026
Required payments$6.0 $306.0 $6.0 $2,280.5 $300.0 
v3.22.0.1
Pension and Other Post-Retirement Benefits
 12 Months Ended
Dec. 31, 2021
Pension and Other Post-Retirement Benefit Plans [Abstract]  
Pension and Other Postretirement Benefits Disclosure [Text Block]
Multi-employer Pension Plan
In connection with the collective bargaining agreement signed with the International Association of Machinists and Aerospace Workers (“IAM”), the Company contributes to a multi-employer defined benefit pension plan (“IAM National Pension Fund”). As of July 1, 2015, the level of contribution, as specified in the bargaining agreement was, in whole dollars, $1.75 per hour of employee service. The IAM bargaining agreement provided for a $0.05 per hour increase, in whole dollars, effective July 1 of each year through 2019. Effective July 1, 2019 the level of employer contribution increased to $1.95 per hour and will remain at $1.95 per hour through contract expiration. The IAM contract expires June 24, 2023.
The collective bargaining agreement with the United Automobile, Aerospace and Agricultural Workers of America (“UAW”) requires the Company to contribute a specified amount per hour of service to the IAM National Pension Fund. The specified amount was $1.70 per hour in 2019. Per the negotiated UAW collective bargaining agreement, the pension contributions, in whole dollars, was $1.70 per hour effective January 1, 2019 and will be $1.75 per hour effective January 1, 2020 through year 2025.
The risk of this multi-employer plan is different from single-employer plans in the following aspects:
1.Assets contributed to the multi-employer plan by one employer may be used to provide benefits to employees of other participating employers.
2.If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.
3.If the Company chooses to stop participating in the multi-employer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability.
The following table summarizes the multi-employer plan to which the Company contributes. Unless otherwise noted, the most recent Pension Protection Act (PPA) zone status available in 2020 and 2021 is for the plan's year-end at December 31, 2020, and December 31, 2021, respectively. The zone status is based on information received from the plan.
  Pension Protection Act Zone Status     Expiration
Date of
Collective-
Bargaining
Agreement
  FIP/RP
Status
Pending/
Implemented		Contributions of the Company 
 EIN/Pension
Plan Number		Surcharge
Imposed
Pension Fund20202021201920202021
IAM National Pension Fund51-60321295RedRedYes$40.7 $30.1 $23.0 YesIAM June 24, 2023
UAW December 7, 2025
Pension Fund
Year Company Contributions to Plan Exceeded More Than 5 Percent of
Total Contributions (as of December 31 of the Plan’s Year-End)
IAM National Pension Fund2019, 2020
Defined Contribution Plans
The Company contributes to a defined contribution plan available to all U.S. employees, excluding IAM and UAW represented employees. Under the plan, the Company makes a matching contribution of 75% of the employee contribution to a maximum 8% of eligible individual employee compensation. In addition, non-matching contributions based on an employee’s age and years of service are paid at the end of each calendar year for certain employee groups.
The Company recorded $30.4, $32.5, and $35.9 in contributions to these plans for the twelve months ended December 31, 2021, 2020, and 2019, respectively.
On April 1, 2006, as part of the acquisition of BAE Aerostructures, the Company established a defined contribution pension plan for those employees who are hired after the date of acquisition. Under the plan, the Company contributes 8% of base salary while participating employees are required to contribute 4% of base salary. The Company recorded $3.9 in contributions to this plan for the twelve months ended December 31, 2021, $4.1 in contributions for the twelve months ended December 31, 2020 and $4.1 in contributions for the twelve months ended December 31, 2019.
On October 30, 2020, as part of the Bombardier Acquisition, the Company acquired a further defined contribution plan for certain employees at the Belfast location. Under the plan, the Company contributes up to 8% of base salary, matching employee contributions up to this level. The Company recorded $0.3 in contributions to this plan for the twelve months ended December 31, 2021 and $0.03 for the two months from October 30, 2020 to December 31, 2020, excluding contributions paid in respect of employee's own contributions.

A new defined contribution plan was set up at the Belfast location following the closure of the Shorts Pension with effect from December 10, 2021 (see below). Under the terms of the plan, the Company contributes up to 8% of base salary if participating employees contribute 4% of base salary. Additional transitional contributions of 5% a year for the first four years then 4% a year for the next four years are also payable by the Company for employees who were members of Shorts Pension at the point of closure.
Defined Benefit Pension Plans
Effective June 17, 2005, pension assets and liabilities were spun-off from three Boeing qualified plans into four qualified Spirit plans for each Spirit employee who did not retire from Boeing by August 1, 2005. Effective December 31, 2005, all four qualified plans were merged together. In addition, Spirit has one nonqualified plan providing supplemental benefits to executives who transferred from a Boeing nonqualified plan to a Spirit plan and elected to keep their benefits in this plan. Both plans are frozen as of the date of the Boeing Acquisition (i.e., no future service benefits are being earned in these plans). The Company intends to fund its qualified pension plan through a trust. Pension assets are placed in trust solely for the benefit of the pension plans’ participants and are structured to maintain liquidity that is sufficient to pay benefit obligations. Effective October 1, 2021, the Company spun off a portion of the existing Pension Value Plan ("PVP A"), called PVP B. As part of the plan termination process, a lump sum offering was provided during 2021 for PVP B participants and the final asset distribution is expected in the first quarter of 2022.

On April 1, 2006, as part of the acquisition of BAE Aerostructures, the Company established a U.K. defined benefit pension plan for those employees based in Prestwick that had pension benefits remaining in BAE Systems’ pension plan. Effective December 31, 2013, this Prestwick pension plan was closed and benefits were frozen and thereafter subject only to statutory pension revaluation.
On October 30, 2020, as part of the Bombardier Acquisition, the Company acquired two further defined benefit plans for current and former employees at the Belfast location. As of December 31, 2021, the Company had concluded its consultation
and communication with employee and Trade Union representatives on the closure of the largest of the defined benefit plans acquired as part of the Bombardier Acquisition, the Shorts Pension (as defined below). The outcome is that the Shorts Pension was amended and closed to the future accrual of benefits for all employees who are members of the plan, effective December 10, 2021. From December 11, 2021, affected employees will build up future retirement savings in a new defined contribution scheme. For the twelve months ended December 31, 2021, the impact of the closure of the Shorts Pension resulted in a curtailment gain of $61.0. The remaining plan is closed to new hires and the future accrual of benefits, as the final employees accruing service in the plan left Company employment. In accordance with the agreement reached as part of the Bombardier Acquisition, the Company made contributions of $154.7 to improve the funded status of the Belfast defined benefit plans during 2021, which included a one-time special contribution of $137.6 to the Shorts Pension plan during October 2021.
In accordance with legislation, each of the U.K. plans and their assets are managed by independent trustee companies. The investment strategies adopted by the trustees are documented in Statement of Investment Principles in line with U.K. legislation. The principles for the investment strategies are to maximize the long-term rate of return on plan assets within an acceptable level of risk while maintaining adequate funding levels. The trustees have invested the plan assets in pooled arrangements with authorized investment companies that were selected to be consistent with the overall investment principles and strategy.
Other Post-Retirement Benefit Plans
The Company also has post-retirement health care coverage for eligible U.S. retirees and qualifying dependents prior to age 65. Eligibility for employer-provided benefits is limited to those employees who were employed at the date of the Boeing Acquisition and retire on or after attainment of age 62 and 10 years of service. Employees who do not satisfy these eligibility requirements can retire with post-retirement medical benefits at age 55 and 10 years of service, but they must pay the full cost of medical benefits provided.
On October 30, 2020, as part of the Bombardier Acquisition, the Company acquired a post-retirement medical plan for certain former employees at the Belfast location. Eligibility for this plan is closed and no further participants in the plan are expected.
Obligations and Funded Status
The following tables reconcile the funded status of both pension and post-retirement medical benefits to the balance on the balance sheets for the fiscal years 2021 and 2020. Benefit obligation balances presented in the tables reflect the projected benefit obligation and accumulated benefit obligation for the Company’s pension plans, and accumulated post-retirement benefit obligations for the Company’s post-retirement medical plan. The Company uses an end of fiscal year measurement date of December 31 for the Company's U.S. pension and post-retirement medical plans. Special termination benefits for the period ending December 31, 2020 were related to a voluntary retirement program offered by the Company in 2020. The projected benefit obligation of the U.S. based defined benefit plans as of December 31, 2021 decreased overall due largely to an increase in the effective discount rate (41 basis points for PVP A). These factors were partially offset by the spinoff of PVP B from PVP A resulting in a settlement loss. The US based Other Post-Retirement benefit plans projected benefit obligation decreased due to an increase in the effective discount rate of 70 basis points. The projected benefit obligation of the U.K. Prestwick Plan decreased, driven by the discount rate increasing by 30 basis points from December 31, 2020 to December 31, 2021. The projected benefit obligation of the U.K. Belfast plans was acquired on October 30, 2020, as part of the Bombardier Acquisition. The funded status for the U.K. Belfast plans improved over the year primarily due to the impact of closing the Shorts Pension to future accrual, the deficit reduction contributions paid by the Company which were agreed as part of the Bombardier Acquisition and out-performance of the plan assets over the projected benefit obligation.
 Pension BenefitsOther Post-Retirement
Benefits
 Periods Ended December 31,Periods Ended December 31,
U.S. Plans2021202020212020
Change in projected benefit obligation:    
Beginning balance$1,099.1 $1,096.6 $49.5 $41.8 
Service cost— — 0.8 0.8 
Employee contributions— — 1.3 1.2 
Interest cost18.7 24.4 0.3 1.0 
Actuarial losses (gains)(38.7)124.8 1.0 (1.8)
Special termination benefits— 31.0 — 12.0 
Plan Curtailment— 33.9 — 2.3 
Plan Settlements(226.7)(175.5)— — 
Benefits paid(38.3)(36.1)(10.4)(7.8)
Projected benefit obligation at the end of the period$814.1 $1,099.1 $42.5 $49.5 
Assumptions used to determine benefit obligation:    
Discount rate2.72 %2.31 %1.96 %1.26 %
Rate of compensation increaseN/AN/AN/AN/A
Medical assumptions:  
Trend assumed for the yearN/AN/A7.00 %5.56 %
Ultimate trend rateN/AN/A4.00 %4.50 %
Year that ultimate trend rate is reachedN/AN/A20472038
Change in fair value of plan assets:  
Beginning balance$1,526.3 $1,519.5 $— $— 
Actual return (loss) on assets66.3 218.4 — — 
Employer contributions to plan(9.0)0.1 9.1 6.6 
Employee contributions to plan— — 1.3 1.2 
Plan Settlements(226.7)(175.5)— — 
Benefits paid(38.3)(36.2)(10.4)(7.8)
Ending balance$1,318.6 $1,526.3 $— $— 
Reconciliation of funded status to net amounts recognized:    
Funded status (deficit)$504.5 $427.3 $(42.5)$(49.5)
Net amounts recognized$504.5 $427.3 $(42.5)$(49.5)
Amounts recognized in the balance sheet:   
Noncurrent assets$505.8 $428.7 — — 
Current liabilities(0.1)(0.1)(9.7)(10.3)
Noncurrent liabilities(1.2)(1.3)(32.8)(39.2)
Net amounts recognized$504.5 $427.3 $(42.5)$(49.5)
Amounts not yet reflected in net periodic benefit cost and included in AOCI:    
Accumulated other comprehensive (loss) income$51.7 $(6.5)$16.2 $19.3 
Cumulative employer contributions in excess of net periodic benefit cost452.8 433.8 (58.7)(68.8)
Net amount recognized in the balance sheet$504.5 $427.3 $(42.5)$(49.5)
Information for pension plans with benefit obligations in excess of plan assets:   
Projected benefit obligation$1.3 $1.4 $42.5 $49.5 
Accumulated benefit obligation1.3 1.4 — — 
The U.S. based defined benefit plans utilize a cash balance based formula for a subset of the plan participants. The weighted-average interest crediting rates used to determine the benefit obligation and net periodic benefit cost for all future years is 5.25%.
 Pension Benefits
 Periods Ended December 31,
U.K. Prestwick Plan20212020
Change in projected benefit obligation:  
Beginning balance$75.9 $66.7 
Service cost1.2 0.9 
Interest cost1.0 1.2 
Actuarial loss (gain) (1.3)12.2 
Benefits paid(1.1)(0.8)
Expense paid(1.2)(0.9)
Plan settlements(2.2)(5.9)
Exchange rate changes(0.7)2.5 
Projected benefit obligation at the end of the period$71.6 $75.9 
Assumptions used to determine benefit obligation:  
Discount rate1.75 %1.45 %
Rate of compensation increase3.50 %3.10 %
Change in fair value of plan assets:
Beginning balance$103.1 $91.6 
Actual return (loss) on assets(0.9)15.1 
Company contributions1.9 1.7 
Plan settlements(2.5)(6.9)
Expenses paid(1.2)(0.9)
Benefits paid(1.1)(0.8)
Exchange rate changes(1.0)3.3 
Ending balance$98.3 $103.1 
Reconciliation of funded status to net amounts recognized:  
Funded status26.7 27.2 
Net amounts recognized$26.7 $27.2 
Amounts recognized in the balance sheet:  
Noncurrent assets$26.7 $27.2 
Noncurrent liabilities— — 
Net amounts recognized$26.7 $27.2 
Amounts not yet reflected in net periodic benefit cost and included in AOCI:  
Accumulated other comprehensive income4.3 5.8 
Prepaid pension cost22.4 21.4 
Net amount recognized in the balance sheet$26.7 $27.2 
Information for pension plans with benefit obligations in excess of plan assets:  
Projected benefit obligation$— $— 
Accumulated benefit obligation— — 
Fair value of assets$— $— 

Pension BenefitsOther
Post-Retirement
Benefits
Periods Ended December 31,Periods Ended December 31,
U.K Belfast Plans2021202020212020
Change in projected benefit obligation:
Beginning balance$2,661.4 $— $0.8 $— 
Net transfer in/(out) (including the effect of any business combination divestitures)— 2,311.8 — 0.7 
Service cost39.3 6.3 0.1 — 
Employee contributions0.9 — — — 
Expenses Paid(1.3)— — — 
Interest cost36.3 6.0 — — 
Actuarial losses (gains)(57.5)183.9 — — 
Plan curtailments(61.0)— — — 
Exchange rate changes(22.2)161.6 — 0.1 
Benefits paid(67.9)(8.2)(0.1)— 
Projected benefit obligation at the end of the period$2,528.0 $2,661.4 $0.8 $0.8 
Assumptions used to determine benefit obligation:
Discount rate1.8 %1.45 %1.8 %1.45 %
Rate of compensation increaseN/A2.90 %N/AN/A
Medical assumptions:
Trend assumed for the yearN/AN/A5.75 %5.50 %
Ultimate trend rateN/AN/A5.75 %5.50 %
Year that ultimate trend rate is reachedN/AN/AN/AN/A
Change in fair value of plan assets:
Beginning balance$2,262.7 $— $— $— 
Net transfer in/(out) (including the effect of any business combination divestitures)— 2,003.7 — — 
Actual return on assets139.7 125.9 — — 
Employer contributions to plan180.9 3.8 0.1 — 
Employee contributions to plan0.9 0.1 — — 
Benefits paid(67.9)(8.2)(0.1)— 
Exchange rate changes(26.9)137.4 — — 
Expenses paid(1.3)— — — 
Ending balance$2,488.1 $2,262.7 $— $— 
Reconciliation of funded status to net amounts recognized:
Funded status (deficit)$(39.9)$(398.8)$(0.8)$(0.8)
Net amounts recognized$(39.9)$(398.8)$(0.8)$(0.8)
Amounts recognized in the balance sheet:
Noncurrent assets0.6 — — — 
Current liabilities— — (0.1)— 
Noncurrent liabilities(40.5)(398.8)(0.7)(0.8)
Net amounts recognized$(39.9)$(398.8)$(0.8)$(0.8)
Amounts not yet reflected in net periodic benefit cost and included in AOCI:
Accumulated other comprehensive (loss) income$21.6 $(404.7)$— $(0.8)
Cumulative employer contributions in excess of net periodic benefit cost(61.5)5.9 (0.8)— 
Net amount recognized in the balance sheet$(39.9)$(398.8)$(0.8)$(0.8)
Information for pension plans with benefit obligations in excess of plan assets:
Projected benefit obligation$2,501.9 $2,661.4 $0.8 $— 
Accumulated benefit obligation2,501.9 2,594.5 — — 
Fair value of assets2,461.2 2,262.7 — — 
Annual Expense
The components of pension and other post-retirement benefit plans expense for the U.S. plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
 Pension BenefitsOther
Post-Retirement
Benefits
 Periods Ended
December 31,		Periods Ended
December 31,
U.S. Plans202120202019202120202019
Components of net periodic benefit cost (income):      
Service cost$— $— $— $0.8 $0.8 $0.9 
Interest cost18.7 24.4 36.5 0.3 1.0 1.2 
Expected return on plan assets(57.7)(64.2)(66.7)— — — 
Amortization of net (gain) loss— 0.2 0.5 (1.3)(1.7)(2.2)
Amortization of prior service costs— — — (0.8)(0.9)(0.9)
Settlement loss recognized(1)
11.0 9.8 3.4 — — — 
Curtailment loss/(gain) (2)
— 33.9 — — (0.2)— 
Special termination benefits(2)
— 31.0 5.2 — 12.0 3.9 
Net periodic benefit (income) cost(28.0)35.1 (21.1)(1.0)11.0 2.9 
Other changes recognized in OCI:      
Total recognized in other OCI (income) loss$(58.2)$(39.4)$(95.9)$3.2 $1.0 $4.9 
Total recognized in other net periodic benefit and OCI (income) loss$(86.2)$(4.3)$(117.0)$2.2 $12.0 $7.8 
Assumptions used to determine net periodic benefit costs:      
Discount rate2.31 %3.19 %4.21 %1.26 %2.55 %3.74 %
Expected return on plan assets4.00 %4.50 %5.00 %N/AN/AN/A
Salary increasesN/AN/AN/AN/AN/AN/A
Medical Assumptions:      
Trend assumed for the yearN/AN/AN/A5.56 %5.90 %6.24 %
Ultimate trend rateN/AN/AN/A4.50 %4.50 %4.50 %
Year that ultimate trend rate is reachedN/AN/AN/A203820382038

(1) Due to settlement accounting during the fiscal years ending 2021, 2020, and 2019, the Company recognized charges of $11.0, $9.8 and $3.4, respectively, that was recorded to Other income (expense).

(2) Special termination benefits and curtailment loss as of December 31, 2020 and December 31, 2019 is a combination of pension value plan, post-retirement medical plan, offset by a reduction in the Company’s net benefit obligation. The increase is due to voluntary retirement programs in 2020 and 2019.
The Company records the service component of net periodic benefit cost in operating profit and the non-service components of net periodic benefit cost (i.e., interest cost, expected return on plan assets, amortization of prior service cost, special termination benefits, and net actuarial gains or losses) as part of non-operating income.
The components of the pension benefit plan expense for the U.K. plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
 Pension Benefits
 Periods Ended
December 31,
U.K. Prestwick Plan202120202019
Components of net periodic benefit cost (income):   
Service cost$1.2 $0.9 $0.9 
Interest cost1.0 1.2 1.7 
Expected return on plan assets(1.4)(1.7)(2.4)
Settlement gain(0.2)(0.4)(0.2)
Net periodic benefit cost (income)$0.6 $— $— 
Other changes recognized in OCI:   
Total cost (income) recognized in OCI$1.2 $(0.9)$(3.2)
Total recognized in net periodic benefit cost and OCI$1.8 $(0.9)$(3.2)
Assumptions used to determine net periodic benefit costs:   
Discount rate1.45 %2.10 %3.00 %
Expected return on plan assets1.40 %2.00 %3.10 %
Salary increases3.10 %3.15 %3.40 %
The estimated net (gain) loss that will be amortized from other comprehensive income into net periodic benefit cost over the next fiscal year for the U.K. plan is zero.
The components of the pension benefit plan expense for the Belfast plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
Pension BenefitsOther Post-Retirement Benefits
Periods Ended
December 31,		Periods Ended
December 31,
U.K. Belfast Plans202120202019202120202019
Components of net periodic benefit cost (income):
Service cost$39.3 $6.3 $— $0.1 $— $— 
Interest cost36.3 5.9 — — — — 
Curtailment (gain)/loss recognized(1)
(61.0)— — — — — 
Expected return on plan assets(95.2)(14.0)— — — — 
Net periodic benefit cost (income)$(80.6)$(1.8)$— $0.1 $— $— 
Other changes recognized in OCI:
Total (income) recognized in OCI$(98.1)$96.6 $— $— $— $— 
Total recognized in net periodic benefit cost and OCI$(178.7)$94.8 $— $0.1 $— $— 
Assumptions used to determine net periodic benefit costs:
Discount rate1.45 %1.75 %— %1.45 %1.75 %N/A
Expected return on plan assets4.20 %4.20 %— %N/AN/AN/A
Salary increases2.90 %2.75 %— %N/AN/AN/A
Medical Assumptions:
Trend assumed for the yearN/AN/AN/A5.75 %5.50 %N/A
Ultimate trend rateN/AN/AN/A5.75 %5.50 %N/A
Year that ultimate trend rate is reachedN/AN/AN/AN/AN/AN/A
(1) In the fourth quarter of 2021, the Shorts Pension Defined Benefit plan was closed out and a new defined contribution plan was opened for affected employees. This closure resulted in a curtailment gain of $61.0.

Assumptions
The Company sets the discount rate assumption annually for each of its retirement-related benefit plans as of the measurement date, based on a review of projected cash flow and a long-term high-quality corporate bond yield curve. The discount rate determined on each measurement date is used to calculate the benefit obligation as of that date, and is also used to calculate the net periodic benefit (income)/cost for the upcoming plan year. During 2015, the mortality assumption for the U.S. plans was updated to Mercer’s MRP-2007 generational mortality tables for non-annuitants and Mercer’s MILES-2010 generational tables for the Auto, Industrial Goods and Transportation group for annuitants both reflecting Mercer’s MMP-2007 improvement scale. In 2018, the Company incorporated the MMP-2018 improvement scale. MMP-2018 is a Mercer-developed scale that uses the same basic model as the Society of Actuaries MP-2018 scale, but with different parameters and adjustments for actual experience since 2006. In 2019, the Company incorporated the MMP-2019 improvement scale which was utilized in 2020. In 2021, the Company incorporated the MMP-2021 improvement scale. MMP-2021 is a Mercer-developed scale that uses the same basic model as the Society of Actuaries MP-2019 scale, but with different parameters and adjustments for actual experience since 2006. A blue collar adjustment is reflected for the hourly union participants and a white collar adjustment is reflected for all other participants. Actuarial gains and losses are amortized using the corridor method over the average working lifetimes of active participants/membership.

The pension expected return on assets assumption is derived from the long-term expected returns based on the investment allocation by class specified in the Company’s investment policy. The expected return on plan assets determined on each measurement date is used to calculate the net periodic benefit (income)/cost of the upcoming plan year.

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. To determine the health care cost trend rates the Company considers national health trends and adjusts for its specific plan design and locations. The trend and aging assumptions were updated during 2016 to reflect more current trends. These assumptions were reviewed in 2021 based on a review of updated national health trends.
U.S. Plans
The Company’s investment objective is to achieve long-term growth of capital, with exposure to risk set at an appropriate level. This objective shall be accomplished through the utilization of a diversified asset mix consisting of equities (domestic and international) and taxable fixed income securities. The allowable asset allocation range is:
Equities
20 – 50%
Fixed income
50 – 80%
Real estate
0 – 7%
Investment guidelines include that no security, except issues of the U.S. Government, shall comprise more than 5% of total Plan assets and further, no individual portfolio shall hold more than 7% of its assets in the securities of any single entity, except issues of the U.S. Government. The following derivative transactions are prohibited — leverage, unrelated speculation and “exotic” collateralized mortgage obligations or CMOs. Investments in hedge funds, private placements, oil and gas and venture capital must be specifically approved by the Company in advance of their purchase.
The Company’s plans have asset allocations for the U.S., as of December 31, 2021 and December 31, 2020, as follows:
20212020
Asset Category — U.S.  
Cash equivalents6 %— %
Equity securities — U.S. 22 %26 %
Equity securities — International3 %3 %
Debt securities67 %69 %
Real estate2 %2 %
Total100 %100 %

U.K. Prestwick Plan
The Trustee’s investment objective is to ensure that they can meet their obligation to the beneficiaries of the Plan. An additional objective is to achieve a return on the total Plan, which is compatible with the level of risk considered appropriate. The overall benchmark allocation of the Plan’s assets is:
Equity securities
15 – 17%
Debt securities82 - 84%
Property1%
The Plan has asset allocations as of December 31, 2021 and December 31, 2020, as follows:
20212020
Asset Category — U.K. Prestwick  
Equity securities15 %15 %
Debt securities80 %80 %
Other5 %5 %
Total100 %100 %

U.K. Belfast Plans
The Trustees’ investment objective is to ensure that they can meet their obligation to the beneficiaries of the Plans. An additional objective is to achieve a return on the total Plan, which is compatible with the level of risk considered appropriate. The overall benchmark allocation of the Plan’s assets is:
Equity securities31%
Fixed Income35%
Indexed-Linked Gilts19%
Real Return Assets13%
Money Market2%

The Plans have asset allocations as of December 31, 2021 and December 31, 2020, as follows:
20212020
Asset Category — U.K. Belfast  
Equity securities32 %32 %
Fixed Income34 %36 %
Indexed-Linked Gilts18 %15 %
Real Return Assets13 %13 %
Money Market3 %4 %
Total100 %100 %

Projected contributions and benefit payments
Required U.S. pension contributions under Employee Retirement Income Security Act (ERISA) regulations are expected to be zero in 2022 and discretionary contributions are not expected in 2022. SERP and post-retirement medical plan contributions in 2022 are expected to be $9.8. Expected contributions to the U.K. Prestwick plan for 2022 are zero. Expected contributions to the U.K. (Belfast) plans for 2022 are $19.0.
The Company monitors its defined benefit pension plan asset investments on a quarterly basis and believes that the Company is not exposed to any significant credit risk in these investments.
The total benefits expected to be paid over the next ten years from the plans’ assets or the assets of the Company, by country, are as follows:
U.S.Pension PlansOther
Post-Retirement
Benefit Plans
2022$69.1 $9.7 
2023$40.0 $8.7 
2024$40.7 $6.2 
2025$41.4 $4.3 
2026$42.0 $3.3 
2027-2031$214.7 $11.2 
U.K. PrestwickPension Plans
2022$1.1 
2023$1.1 
2024$1.1 
2025$1.2 
2026$1.2 
2027-2031$6.3 
U.K. BelfastPension PlansOther
Post-Retirement
Benefit Plans
2022$69.3 $0.1 
2023$70.6 $0.1 
2024$71.9 $0.1 
2025$73.3 $0.1 
2026$74.7 $0.1 
2027-2031$395.1 $0.5 

Fair Value Measurements
The pension plan assets are valued at fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the valuation hierarchy.
Temporary Cash Investments — These investments consist of U.S. dollars and foreign currencies held in master trust accounts. Foreign currencies held are reported in terms of U.S. dollars based on currency exchange rates readily available in active markets. These temporary cash investments are classified as level 1 investments.
Collective Investment Trusts — These investments are public investment vehicles valued using market prices and performance of the fund. The trust allocates notional units to the policy holder based on the underlying notional unit buy (offer) price using the middle market price plus transaction costs. These investments are classified within level 2 of the valuation hierarchy. In addition, the collective investment trust includes a real estate fund, which is classified within level 3 of the valuation hierarchy.
Commingled Equity and Bond Funds — These investments are valued at the closing price reported by the Plan Trustee. These investments are not being traded in an active market, but are backed by various investment securities managed by the Bank of New York. Fair value is being calculated using inputs that rely on the Bank of New York’s own assumptions, which are based on underlying investments that are traded on an active market and classified within level 2 of the valuation hierarchy.
As of December 31, 2021 and December 31, 2020, the pension plan assets measured at fair value on a recurring basis were as follows:
  At December 31, 2021 Using
DescriptionDecember 31, 2021 TotalQuoted Prices in
Active Markets
for Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Temporary Cash Investments$80.4 $80.4 $— $— 
Collective Investment Trusts97.6 — 95.7 1.9 
Commingled Equity and Bond Funds3,700.1 — 3,700.1 — 
$3,878.1 $80.4 $3,795.8 $1.9 
  At December 31, 2020 Using
DescriptionDecember 31, 2020 TotalQuoted Prices in
Active Markets
for Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Temporary Cash Investments$6.4 $6.4 $— $— 
Collective Investment Trusts102.4 — 99.0 3.4 
Commingled Equity and Bond Funds3,735.0 — 3,735.0 — 
$3,843.8 $6.4 $3,834.0 $3.4 
The table below sets forth a summary of changes in the fair value of the Plan’s level 3 investment assets and liabilities for the years ended December 31, 2021 and December 31, 2020:
 December 31, 2021
DescriptionBeginning
Fair Value		PurchasesGain (Loss)Sales,
Maturities,
Settlements, Net		Exchange
rate		Ending Fair
Value
Collective Investment Trusts$3.4 $— $0.2 $(1.7)$— $1.9 
$3.4 $— $0.2 $(1.7)$— $1.9 

 December 31, 2020
DescriptionBeginning
Fair Value		PurchasesGain (Loss)Sales,
Maturities,
Settlements, Net		Exchange
rate		Ending Fair
Value
Collective Investment Trusts$3.4 $— $(0.1)$— $0.1 $3.4 
$3.4 $— $(0.1)$— $0.1 $3.4 
Pension and Other Post Retirement Benefits Plans U.K. Belfast Asset Category
The Plans have asset allocations as of December 31, 2021 and December 31, 2020, as follows:
20212020
Asset Category — U.K. Belfast  
Equity securities32 %32 %
Fixed Income34 %36 %
Indexed-Linked Gilts18 %15 %
Real Return Assets13 %13 %
Money Market3 %4 %
Total100 %100 %
v3.22.0.1
Capital Stock
 12 Months Ended
Dec. 31, 2021
Class of Stock Disclosures [Abstract]  
Capital Stock Capital Stock
Holdings has authorized 210,000,000 shares of stock. Of that, 200,000,000 shares are Common Stock, par value $0.01 per share, one vote per share and 10,000,000 shares are preferred stock, par value $0.01 per share.
In association with the Boeing Acquisition, Spirit executives with balances in Boeing’s Supplemental Executive Retirement Plan (“SERP”) were authorized to purchase a fixed number of units of Holdings “phantom stock” at $3.33 per unit based on the present value of their SERP balances. Any payment on account of units may be made in cash or shares of Common Stock at the sole discretion of Holdings. The balance of SERP units was 16,023, 28,950 and 38,754 as of December 31, 2021, 2020, and 2019, respectively.
Repurchases of Common Stock    
As of December 31, 2021, there was $925.0 remaining under the Board-authorized share repurchase program. During the twelve months ended December 31, 2021, no shares were repurchased under the Board-authorized share repurchase program. Share repurchases are currently on hold due to the impacts of the B737 MAX grounding and the COVID-19 pandemic. The Credit Agreement imposes additional restrictions on the Company’s ability to repurchase shares.
v3.22.0.1
Stock Compensation
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Stock Compensation Stock Compensation
Holdings has established the stockholder-approved 2014 Omnibus Incentive Plan, as amended (the “Omnibus Plan”) to grant cash and equity awards to certain individuals. Compensation values are based on the value of Holdings’ Common Stock on the grant date, which is added to equity and charged to period expense. The Company’s Omnibus Plan was amended in October 2019 to allow for participants to make tax elections with respect to their equity awards.
Holdings has recognized a net total of $25.8, $24.2, and $36.1 of stock compensation expense for the twelve months ended December 31, 2021, 2020, and 2019, respectively. Stock compensation expense is charged in its entirety directly to selling, general and administrative expense.
Short-Term Incentive Plan
The Short-Term Incentive Program under the Omnibus Plan enables eligible employees to receive incentive benefits in the form of cash as determined by the Compensation Committee.
Board of Directors Stock Awards
The Company’s Omnibus Plan provides non-employee directors the opportunity to receive grants of restricted shares of Common Stock, or Restricted Stock Units (“RSUs”) or a combination of both Common Stock and RSUs. The Common Stock grants and RSU grants vest one year from the grant date subject to the directors compliance with the one-year service condition; however, the RSU grants are not payable until the director’s separation from service. The Board of Directors is authorized to make discretionary grants of shares or RSUs from time to time. Compensation values are based on the value of Holdings’ Common Stock on the grant date, which is added to equity and charged to period expense or included in inventory and cost of sales.
The Company expensed a net amount of $1.5, $1.4, and $1.4 for the restricted shares of Common Stock and RSUs for the twelve months ended December 31, 2021, 2020, and 2019, respectively. As of December 31, 2021, the Company’s unamortized stock compensation related to these restricted shares of Common Stock and RSUs is $0.5, which will be recognized over a weighted average remaining period of 4 months. The intrinsic value of the unvested restricted shares of Common Stock and RSUs, based on the value of the Company’s stock at December 31, 2021, was $1.5, based on the value of the Company’s Common Stock and the number of unvested shares of restricted Common Stock and RSUs.
The following table summarizes grants of restricted Common Stock and RSUs to members of the Company’s Board of Directors for the twelve months ended December 31, 2021, 2020, and 2019:
 Shares
Value(1)
 Class AClass A
 (Thousands) 
Board of Directors Stock Grants  
Nonvested at December 31, 201822 1.6 
Granted during period17 1.5 
Vested during period(22)(1.7)
Forfeited during period— — 
Nonvested at December 31, 201917 1.4 
Granted during period65 1.3 
Vested during period(17)(1.5)
Forfeited during period— — 
Nonvested at December 31, 202065 1.2 
Granted during period36 $1.6 
Vested during period(65)$(1.2)
Forfeited during period— $— 
Nonvested at December 31, 202136 $1.6 
______________________________________________________________________________________________________________________________
(1)Value represents grant date fair value per share.
Long-Term Incentive Awards
Holdings has established the Long-Term Incentive Plan (the “LTIP”) under the Omnibus Plan to grant equity awards to certain employees. Generally, specified employees are entitled to receive a long-term incentive award that, for the 2021 year, consisted of the following:
•60% of the award consisted of time-based, service-condition restricted Common Stock that vests in equal installments over a three-year period (restricted stock awards (“RSAs”) or restricted stock units (“RSUs”)). Values for these awards are based on the value of Common Stock on the grant date.
•40% of the award consisted of performance-based, market-condition restricted Common Stock that vests on the three-year anniversary of the grant date contingent upon TSR compared to the Company’s peers (the “TSR Award”). Values for these awards are initially measured on the grant date using estimated payout levels derived from a Monte Carlo valuation model.
For the 2020 and 2019 years, specified employees were entitled to receive a long-term incentive award that generally consisted of the following:
•60% of the award consisted of time-based, service-condition restricted Common Stock that vests in equal installments over a three-year period (the “RS Award”). Values for these awards are based on the value of Common Stock on the grant date.
•20% of the award consisted of performance-based, market-condition restricted Common Stock that vests on the three-year anniversary of the grant date contingent upon TSR compared to the Company’s peers (the “TSR Award”). Values for these awards are initially measured on the grant date using estimated payout levels derived from a Monte Carlo valuation model.
•20% of the award consisted of performance-based, (performance-condition) restricted Common Stock that vests on the three-year anniversary of the grant date contingent upon the Company’s cumulative three-year free cash flow as a percentage of the Company’s cumulative three-year revenues meeting certain pre-established goals (the “FCF Percentage Award”). Values for these awards are based on the dividend adjusted value of Common Stock on the grant date.
For the twelve months ended December 31, 2021, 570,914 time or service-based restricted stock units (“RSUs”) and 30,024 time or service-based restricted stock awards (“RSAs”) were granted with aggregate date fair values of $26.9 under the Company's LTIP. In addition, 162,102 performance-based restricted stock units (“PBRSUs”) were granted with aggregate grant date fair value of $9.8 under the Company’s LTIP.
For the twelve months ended December 31, 2020, 515,788 shares of Common Stock with an aggregate grant date fair value of $21.0 were granted as RS Awards under the Company’s LTIP. In addition, 385,887 shares of Common Stock with an aggregate grant date fair value of $16.1 were granted as TSR Awards and FCF Percentage Awards under the Company’s LTIP.

For the twelve months ended December 31, 2019, 303,638 shares of Common Stock with an aggregate grant date fair value of $27.3 were granted as RS Awards under the Company’s LTIP. In addition, 127,802 shares of Common Stock with an aggregate grant date fair value of $13.4 were granted as TSR Awards under the Company’s LTIP.
The Company expensed a net total of $24.3, $22.8, and $32.2 for share of Common Stock issued under the LTIP for the twelve month periods ended December 31, 2021, 2020, and 2019, respectively.
As of December 31, 2021, the Company’s unamortized stock compensation related to these unvested shares of Common Stock is $28.9, which will be recognized over a weighted average remaining period of 1.7 years. The intrinsic value of the unvested shares of Common Stock issued under the LTIP at December 31, 2021 was $54.7, based on the value of the Company’s Common Stock and the number of unvested shares.
    The following table summarizes the activity of the restricted shares under the LTIP for the twelve month periods ended December 31, 2021, 2020, and 2019:
 Shares
Value(1)
 Common StockCommon Stock
 (Thousands) 
Long-Term Incentive Plan/Long-Term Incentive Award under Omnibus Plan  
Nonvested at December 31, 20181,391 $86.0 
Granted during period431 40.6 
Vested during period(393)(24.2)
Forfeited during period(125)(8.4)
Nonvested at December 31, 20191,304 94.0 
Granted during period940 39.6 
Vested during period(573)(39.1)
Forfeited during period(192)(14.0)
Nonvested at December 31, 20201,479 80.5 
Granted during period763 36.7 
Vested during period(305)(20.6)
Forfeited during period(535)(27.7)
Nonvested at December 31, 20211,402 $68.9 
________________________________________________________________________________________________________________________________

(1)Value represents grant date fair value.
v3.22.0.1
Income Taxes
 12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Income Tax Disclosure Income Taxes
Income Before Income Taxes: The sources of income before income taxes are:
202120202019
U.S. $(553.3)$(1,046.7)$552.4 
International(1.9)(39.2)110.7 
Total (before equity earnings)$(555.2)$(1,085.9)$663.1 
Income taxes are accounted for in accordance with FASB authoritative guidance on accounting for income taxes. Deferred income tax assets and liabilities are recognized for the future income tax consequences attributable to differences between the financial statement carrying amounts for existing assets and liabilities and their respective tax bases. Tax rate changes impacting these assets and liabilities are recognized in the period during which the rate change occurs.
The Company records an income tax expense or benefit based on the income earned or loss incurred in each tax jurisdiction and the tax rate applicable to that income or loss. In the ordinary course of business, there are transactions for which the ultimate tax outcome is uncertain. These uncertainties are accounted for in accordance with FASB authoritative guidance on accounting for the uncertainty in income taxes. The final tax outcome for these matters may be different than management’s original estimates made in determining the income tax provision. A change to these estimates could impact the effective tax rate and net income or loss in subsequent periods. The Company uses the flow-through accounting method for tax credits. Under this method, tax credits reduce income tax expense.
Provision for Income Tax Taxes: The income tax (benefit) expense contains the following components:
202120202019
Current   
Federal$(11.4)$(301.0)$57.8 
State(0.2)(5.5)0.7 
Foreign0.9 (8.1)(12.8)
Total current$(10.7)$(314.6)$45.7 
Deferred 
Federal$(14.0)$(16.2)$71.8 
State15.9 106.9 (11.4)
Foreign(8.4)3.7 26.7 
Total deferred(6.5)94.4 87.1 
Total income tax provision$(17.2)$(220.2)$132.8 

Reconciliation of Effective Income Tax Rate: The income tax provision from operations differs from the tax provision computed at the U.S. federal statutory income tax rate due to the following:

202120202019
Tax at U.S. Federal statutory rate$(116.5)21.0 %$(228.1)21.0 %$139.3 21.0 %
State income taxes, net of Federal benefit(24.9)4.5 (28.1)2.6 14.9 2.3 
State income tax credits, net of Federal benefit(7.4)1.3 (17.4)1.6 (22.6)(3.4)
Foreign rate differences(5.2)0.9 (3.3)0.3 (7.1)(1.1)
Research and experimentation(1.6)0.3 (0.1)— 0.7 0.1 
Excess tax benefits0.8 (0.1)0.1 — (2.5)(0.4)
Non-deductible expenses1.9 (0.3)10.5 (1.0)4.0 0.6 
Transition tax— — — — 1.6 0.2 
Re-measurement of Deferred Taxes(58.8)10.6 1.7 (0.2)(2.0)(0.3)
Global Intangible Low-Taxed Income (GILTI) Tax0.9 (0.2)3.9 (0.4)7.1 1.1 
Valuation Allowance204.2 (36.9)150.2 (13.8)— — 
NOL Utilized at 35% vs 21%(5.3)1.0 (104.8)9.7 — — 
Other(5.3)1.0 (4.8)0.5 (0.6)(0.1)
Total income tax provision$(17.2)3.1 %$(220.2)20.3 %$132.8 20.0 %

The income tax provision for the twelve months ended December 31, 2021, was ($17.2) compared to ($220.2) for the prior year. The 2021 effective tax rate was 3.1% as compared to 20.3% for 2020.

In 2019, an amended tax return was filed in a foreign jurisdiction for one of the Company’s foreign subsidiaries impacting the amount of undistributed earnings included in the transition tax liability enacted by TCJA. The increase to the transition tax in 2019 is $1.6 which has been included as a component of income tax expense from continuing operations.

The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI cost in the year the tax is incurred as a period expense only. The Company has elected to account for GILTI as a period cost in the year the tax is incurred. As of December 31, 2021, there was $0.9 of GILTI tax expense due to the finalization of the 2020 U.K. NOL carryback to 2019 that will result in an increase to U.S. GILTI tax. As of December 31, 2020 there was a $3.9 of GILTI tax expense due to the preliminary 2020 U.K. NOL carryback to 2019 that resulted in an increase to U.S. GILTI tax. As of December 31, 2019 there was $7.1 of GILTI tax
expense resulting from $0.6 of income tax expense related to activity in 2019 and $6.5 of income tax expense related to the finalization of the 2018 amounts related to GILTI reported in the tax return as agreed upon with the IRS in the course of the Company’s participation in the Internal Revenue Service’s Compliance Assurance Process (“CAP”) program.

The 2021 U.S. Net Operating Loss will be carried forward while the 2020 U.S. Net Operating Loss has been carried back to 2015 and 2016. The tax rate in the carryback years is 35% compared to the current tax rate of 21%. The impact of this rate difference was included in the 2020 year tax provision. The difference between the 2020 provision and the 2020 U.S. Income Tax return impacted the 2020 net operating loss available to be carried back. This difference times the tax rate difference is included in the 2021 year tax provision.

The CARES Act allows net operating losses from 2018, 2019 and 2020 to be carried back to the previous five years, when the federal tax rate was 35%. As of December 31, 2020 the Company reported a net operating loss when it filed its fiscal year 2020 tax return. A preliminary net operating loss carryback claim was filed in March 2021 requesting a refund of $305 which was received in 2021. A second net operating loss carryback claim using the finalized 2020 U.S. Net Operating Loss was filed in December 2021 requesting an additional $11.6 federal refund. The Company had $14.0 and $315.3 of income tax receivable as of December 31, 2021 and December 31, 2020, respectively, which is reflected within other current assets on the balance sheet as well as $0.9 and $0.0 of income tax payable as of December 31, 2021 and December 31, 2020, respectively, which is reflected within other current liabilities on the balance sheet. The Company had $1.6 and $1.5 of non-current income tax payable as of December 31, 2021 and December 31, 2020, respectively, which is reflected within other liabilities on the balance sheet.

Additionally, as allowed by the CARES Act, the Company had deferred $33.0 of employer payroll taxes as of December 31, 2020, of which 50% was deposited by December 2021 and the remaining 50% will be deposited by December 2022. The Company has filed a claim for a pre-tax employee retention credit of $18.8 for 2020. The Company will continue to evaluate its eligibility for this credit through September 2021. In addition, as of December 31, 2020, the Company had recorded a deferral of $31.5 of VAT payments with the option to pay in smaller payments through the end of March 31, 2022 interest free under the United Kingdom deferral scheme. The outstanding deferral of VAT payments as of December 31, 2021 is $3.9.
Oklahoma follows the CARES Act and also allows 2018, 2019 and 2020 net operating losses to be carried back to the previous five years. The 2020 Oklahoma Net Operating Loss has been carried back to 2015 and 2016 resulting in a $3.1 refund claim. The estimated state income tax refund is recorded as an income tax receivable along with the federal income tax receivable as mentioned above.

Deferred Income Taxes: Significant tax effected temporary differences comprising the net deferred tax asset are as follows:
20212020
Depreciation and amortization$(159.6)$(174.3)
Long-term contracts144.2 165.7 
State income tax credits130.1 122.8 
Net operating loss carryforward321.7 98.6 
Accruals and reserves47.8 50.3 
Employee compensation accruals40.0 36.2 
Pension and other employee benefit plans(78.3)(15.3)
Interest expense limitation27.1 22.7 
Post retirement benefits other than pensions10.2 11.8 
Other30.7 8.0 
Inventory1.0 1.2 
Interest swap contracts0.5 0.3 
Net deferred tax asset before valuation allowance515.4 328.0 
Valuation allowance(536.8)(340.9)
Net deferred tax (liability)(21.4)(12.9)
Deferred tax detail above is included in the balance sheet and supplemental information as follows:
20212020
Non-current deferred tax assets0.4 0.1 
Non-current deferred tax liabilities(21.8)(13.0)
Net non-current deferred tax asset (liability)$(21.4)$(12.9)
Total deferred tax asset (liability)$(21.4)$(12.9)

The following is a roll forward of the deferred tax valuation allowance at December 31, 2021, 2020, and 2019:
202120202019
Balance at January 1$340.9 $10.2 $13.2 
Bombardier Acquisition opening balance sheet13.6 163.6 — 
U.K. corporate rate remeasurement63.0 — — 
State income tax credits6.8 110.1 (3.2)
Net operating losses135.4 20.7 — 
Depreciation and amortization0.2 — 0.2 
Other(1.3)19.4 — 
Other comprehensive income adjustment(21.8)16.9 — 
Balance at December 31$536.8 $340.9 $10.2 
Deferred tax assets are periodically evaluated to determine their recoverability and whether or not a valuation allowance is necessary. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. When determining the amount of net deferred tax assets that are more likely than not to be realized, the Company assesses all available positive and negative evidence. The weight given to the positive and negative evidence is commensurate with the extent the evidence may be objectively verified. As such, it is generally difficult for positive evidence regarding projected future taxable income exclusive of reversing taxable temporary differences to outweigh objective negative evidence of recent financial reporting losses.

Based on these criteria and the relative weighting of both the positive and negative evidence available, and in particular the activity surrounding the Company’s prior earnings history including the forward losses previously recognized in the U.S., Management determined that it was necessary to establish a valuation allowance against nearly all of its net U.S. deferred tax assets at December 31, 2020 and December 31, 2021. This determination was made as the Company anticipated entering into a U.S. cumulative loss position during 2021. Once a company enters a cumulative three year loss position, there is a presumption that a company should no longer rely solely on projected future income in determining whether the deferred tax asset is more likely than not to be realized. As of December 31, 2021, the total net U.S. deferred tax asset was $280.3. The net U.S. deferred tax liability after recording valuation allowances is $15.9. Valuation allowances recorded against the consolidated net U.S. deferred tax asset in the current year were $146.1 for a total valuation allowance of $296.2 for the U.S.

The Company has determined a valuation allowance on certain U.K. deferred tax assets is needed based upon historic cumulative losses and current year losses generated in the U.K. The Company recorded a portion of the increase in the valuation allowance to income tax expense in continuing operations ($5.0), a portion to OCI ($21.8), a portion for the remeasurement of deferred tax assets and liabilities from 19% to 25% for the corporate income tax rate change $63.0, and a portion as an adjustment to the opening balance sheet of the Bombardier Acquisition assets $13.6. Valuation allowances recorded against U.K. deferred tax assets in the current year were $49.8 for a total valuation allowance of $240.6 for the U.K.

Included in the deferred tax assets at December 31, 2021 are $113.4 in Kansas High Performance Incentive Program (“HPIP”) Credit, $11.4 in Kansas Research & Development (“R&D”) Credit and $1.0 in Kansas Qualified Vendor (“QV”) Credit, totaling $125.8 in gross Kansas state income tax credit carryforwards, net of federal benefit. The HPIP Credit provides a 10% investment tax credit for qualified business facilities located in Kansas. This credit can be carried forward 16 years. The Kansas R&D Credit provides a credit for qualified research and development expenditures conducted within Kansas. This credit can be carried forward indefinitely. The QV Credit is equal to 15% of the amount for approved expenditures of goods
and services purchased from a qualified vendor, not to exceed $0.5 per qualified vendor per tax year. The QV Credit can be carried forward 4 years.

The one-time transition tax and GILTI provisions within the TCJA effectively transitioned the U.S. to a territorial system and eliminated the deferral of U.S. taxation for certain amounts of income which is not taxed at a minimum level. To the extent a dividend is declared, the tax impact of repatriating earnings would not be significant as substantially all of the net prior unrepatriated earnings have been subject to U.S. tax. Additionally, any foreign tax withholding would not be significant.

During 2021, the Company made a one-time distribution from Malaysia to the U.S. resulting in an insignificant amount of U.S. income tax recorded to the financial statements. The Company continues to maintain that the remaining earnings of all foreign operating subsidiaries are indefinitely invested outside the U.S. As a result, no additional income taxes have been provided on any remaining undistributed foreign earnings not subject to the transition tax, or any additional outside basis difference inherent in these entities. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities (i.e., basis difference in excess of that subject to the one-time transition tax) is not practicable at this time. Accordingly, no deferred taxes have been provided for withholding taxes or other taxes on permanently reinvested earnings.


Unrecognized Tax Benefits: The beginning and ending unrecognized tax benefits reconciliation is as follows:
202120202019
Beginning balance at January 1$16.5 $5.4 $7.2 
Bombardier Acquisition opening balance sheet— 14.0 — 
Remeasurement for tax rate change2.0 — — 
Gross increases related to current period tax positions0.4 0.4 0.4 
Gross decreases related to prior period tax positions— — (2.2)
Statute of limitations' expiration(0.6)(3.3)— 
Ending balance at December 31$18.3 $16.5 $5.4 
Included in the December 31, 2021 balance was $18.3 in unrecognized tax benefits of which $17.1 would reduce the Company's effective tax rate if ultimately recognized.
The Company reports interest and penalties, if any, related to unrecognized tax benefits in the income tax provision. As of December 31, 2021, 2020, and 2019, there was no accrued interest on the unrecognized tax benefit liability included in the balance sheets and there was no impact of interest on the Company’s unrecognized tax benefit liability during 2021, 2020, and 2019.
The Company files income tax returns in all jurisdictions in which it operates.
The Company’s federal audit is complete under the IRS Compliance Assurance Process ("CAP") program for the 2019 and 2020 tax years. The Company will continue to participate in the CAP program for the 2021 and 2022 tax years. The CAP program’s objective is to resolve issues in a timely, contemporaneous manner and eliminate the need for a lengthy post-filing examination. The Company has an open tax audit in the Kingdom of Morocco for tax years ending prior to the Company’s ownership of the Moroccan legal entity. There are ongoing audits in other jurisdictions that are not material to the financial statements and the Company believes appropriate provisions for all outstanding tax issues have been made for all jurisdictions and years.
v3.22.0.1
Equity
 12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Equity Equity
Employee Stock Purchase Plan
The Company maintains the Spirit AeroSystems Holdings, Inc. Employee Stock Purchase Plan (the “ESPP”), which became effective on October 1, 2017 and was amended and restated on January 21, 2020. The ESPP is implemented over
consecutive six-month offering periods, beginning on April 1 and October 1 of each year and ending on the last day of September and March, respectively. Shares are issued on the last trading day of each six-month offering period. Generally, any person who is employed by the Company, Spirit or by a subsidiary or affiliate of the Company that has been designated by the Compensation Committee may participate in the ESPP. As of December 31, 2021, the number of remaining ESPP shares available for future issuances was 751,674.
The maximum number of shares of the Company's Common Stock that may be purchased under the ESPP will be 1,000,000 shares, subject to adjustment for stock dividends, stock splits or combinations of shares of the Company's stock. The per-share purchase price for the Company's Common Stock purchased under the ESPP is 95% of the fair market value of a share of such stock on the last day of the offering period.
Dividends
On February 6, 2020, the Company announced that its Board of Directors reduced its quarterly dividend to a penny per share to preserve liquidity. For each of the four quarters in 2021, the Company paid a quarterly dividend to stockholders of $0.01 per share. The total amount of dividends paid during 2021 was $4.3. The Board regularly evaluates the Company's capital allocation strategy and dividend policy. Any future determination to continue to pay dividends will be at the discretion of the Company's Board of Directors and will depend upon, among other factors, the Company's results of operations, financial condition, capital requirements and contractual restrictions, including the requirements of financing agreements to which the Company may be a party. No assurance can be given that cash dividends will continue to be declared and paid at historical levels or at all.

Earnings per Share Calculation
Basic net income per share is computed using the weighted-average number of outstanding shares of Common Stock during the measurement period. Diluted net income per share is computed using the weighted-average number of outstanding shares of Common Stock and, when dilutive, potential outstanding shares of Common Stock during the measurement period.
The following table sets forth the computation of basic and diluted earnings per share:
 For the Twelve Months Ended
 December 31, 2021December 31, 2020December 31, 2019
 LossSharesPer
Share
Amount		LossSharesPer
Share
Amount		IncomeSharesPer
Share
Amount
Basic EPS        
(Loss) income available to common shareholders$(540.8)104.2 $(5.19)$(870.3)103.9 $(8.38)$529.7 103.6 $5.11 
Income allocated to participating securities— — — —  0.4 0.1  
Net (loss) income $(540.8)  $(870.3)  $530.1   
Diluted potential common shares   1.0  
Diluted EPS         
Net (loss) income $(540.8)104.2 $(5.19)$(870.3)103.9 $(8.38)$530.1 104.7 $5.06 
Included in the outstanding common shares were 0.7 million, 1.5 million and 1.4 million of issued but unvested shares at December 31, 2021, 2020 and 2019, respectively, which are excluded from the basic EPS calculation.
Common shares of 0.6 million were excluded from diluted EPS as a result of incurring a net loss for the twelve month period ended December 31, 2021, as the effect would have been antidilutive. Additionally, diluted EPS for the twelve month period ended December 31, 2021 excludes 0.3 million shares that may be dilutive common shares in the future, but were not included in the computation of diluted EPS because the effect was either antidilutive or the performance condition was not met.
Common shares of 0.8 million were excluded from diluted EPS as a result of incurring a net loss for the twelve month period ended December 31, 2020, as the effect would have been antidilutive. Additionally, diluted EPS for the twelve month
period ended December 31, 2020 excluded 0.3 million shares that were not included in the computation of diluted EPS because the effect was either antidilutive or the performance condition was not met.
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss, net of tax, is summarized by component as follows:
December 31, 2021December 31, 2020
Interest swaps$— $(0.9)
Pension(1)
26.6 (112.0)
SERP/ Retiree medical12.1 14.5 
Derivatives - foreign currency hedge(2.0)— 
Foreign currency impact on long term intercompany loan(12.2)(11.8)
Currency translation adjustment(48.2)(43.9)
Total accumulated other comprehensive loss$(23.7)$(154.1)

(1) The change in Pension related accumulated other comprehensive (loss) income from December 31, 2020 to December 31, 2021 is primarily related to actuarial gains recognized within other comprehensive income related to the US and Belfast pension plans and the impact of settlement accounting on the US plan. See Note 17, Pension and Other Post-Retirement Benefits.

Amortization or settlement cost recognition of the pension plans’ net gain/(loss) reclassified from accumulated other comprehensive loss and realized into costs of sales and selling, general and administrative on the consolidated statements of operations was $2.1, ($9.5) and $(3.7) for the twelve months ended December 31, 2021, 2020 and 2019, respectively.
Non-controlling Interest
Non-controlling interest at December 31, 2021 remained unchanged from the prior year at $0.5.
Repurchases of Common Stock    
The Company accounts for treasury stock under the cost method and includes treasury stock as a component of stockholders’ equity. As of December 31, 2021, no treasury shares have been reissued or retired.
During the twelve month periods ended December 31, 2021 and December 31, 2020 the Company purchased zero shares of its Common Stock under this share repurchase program. The total authorization amount remaining under the current share repurchase program is approximately $925.0. Share repurchases are currently on hold due to the impacts of the B737 MAX grounding and the COVID-19 pandemic. The Credit Agreement imposes additional restrictions on the Company’s ability to repurchase shares.

During the three month period ended December 31, 2021, 8,536 shares were transferred to us from employees in satisfaction of tax withholding obligations associated with the vesting of restricted stock awards under the Omnibus Plan.
Rights Plan 

On April 22, 2020, the Company’s Board of Directors declared a dividend of one right (a “Right”) for each outstanding share of Common Stock held on record at the close of business on May 1, 2020 (the “Record Time”), and adopted a stockholder rights plan, as set forth in the Stockholder Protection Rights Agreement, dated as of April 22, 2020 (the “Rights Agreement”), between the Company and Computershare Inc., as Rights Agent. The Rights Agreement expired on April 22, 2021 per its terms.
v3.22.0.1
Commitments, Contingencies and Guarantees
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Disclosure
Litigation
On February 10, 2020, February 24, 2020, and March 24, 2020, three separate private securities class action lawsuits were filed against the Company in the U.S. District Court for the Northern District of Oklahoma, its Chief Executive Officer, Tom Gentile III, former Chief Financial Officer, Jose Garcia, and former Controller (principal accounting officer), John Gilson. On April 20, 2020, the Class Actions were consolidated by the court (the “Consolidated Class Action”), and on July 20, 2020, the plaintiffs filed a Consolidated Class Action Complaint which added Shawn Campbell, the Company’s former Vice President for the 737NG and B737 Max program, as a defendant. Allegations in the Consolidated Class Action include (i) violations of Section 10(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Rule 10b-5 promulgated thereunder against the Company and Messrs. Gentile, Garcia and Gilson, (ii) violations of Section 20(a) of the Exchange Act against the individual defendants, and (iii) violations of Section 10(b) of the Exchange Act and Rule 10b-5(a) and (c) promulgated thereunder against all defendants.

On June 11, 2020, a shareholder derivative lawsuit (the “Derivative Action 1”) was filed against the Company (as nominal defendant), all members of the Company’s Board of Directors, and Messrs. Garcia and Gilson in the U.S. District Court for the Northern District of Oklahoma. Allegations in the Derivative Action 1 include (i) breach of fiduciary duty, (ii) abuse of control, and (iii) gross mismanagement. On October 5, 2020, a shareholder derivative lawsuit (the “Derivative Action 2” and, together with Derivative Action 1, the “Derivative Actions”) was filed against the Company (as nominal defendant), all members of the Company’s Board of Directors, and Messrs. Garcia and Gilson in the Eighteenth Judicial District, District Court of Sedgwick County, Kansas. Allegations in the Derivative Action 2 include (i) breach of fiduciary duty, (ii) waste of corporate assets, and (iii) unjust enrichment.

The facts underlying the Consolidated Class Action and Derivative Actions relate to the accounting process compliance independent review (the “Accounting Review”) discussed in the Company’s January 30, 2020 press release and described under Management's Discussion and Analysis of Financial Condition and Results of Operations - Accounting Review in Part II, Item 7 of the Annual Report on Form 10-K for the year ended December 31, 2019, and its resulting conclusions. The Company voluntarily reported to the SEC the determination that, with respect to the third quarter of 2019, the Company did not comply with its established accounting processes related to potential third quarter contingent liabilities received after the quarter-end. On March 24, 2020, the Staff of the SEC Enforcement Division informed the Company that it had determined to close its inquiry without recommending any enforcement action against the Company. In addition, the facts underlying the Consolidated Class Action and Derivative Actions relate to the Company’s disclosures regarding the B737 MAX grounding and Spirit’s production rate (and related matters) after the grounding. On September 18, 2020, the Company and individual defendants filed a motion to dismiss the Consolidated Class Action. That motion was granted by the U.S. District Court on January 7, 2022, which denied leave to amend and dismissed the Consolidated Class Action with prejudice. On February 4, 2022, the plaintiffs in the Consolidated Class Action filed a Notice of Appeal to the Tenth Circuit Court of Appeals. The Derivative Actions remain stayed at this point in time. The Company and the individual defendants have and continue to deny the allegations in the Consolidated Class Action and the Derivative Actions.

On October 19, 2021, the U.S. District Court for the District of Kansas ruled in favor of the Company’s former Chief Executive Officer and awarded him $44.8 for benefits withheld in connection with a disputed violation of restrictive covenants in his retirement agreement. The Company has appealed this decision to the Tenth Circuit Court of Appeals. A liability for the full amount of the award has been recognized in the Consolidated Balance Sheets as of December 31, 2021. See Note 25, Supplemental Balance Sheet Information. Based upon the former Chief Executive Officer's selection of cash as the sole remedy, 406,816 shares of Common Stock are no longer included in issued and outstanding shares as of December 31, 2021. These shares were recorded in prior periods to Selling, general, and administrative expense on the Consolidated Statements of Operations as stock compensation expense of $17.1, the amount of which is now included in the liability that has been recognized in the Consolidated Balance Sheets as of December 31, 2021 for the full amount of the award from the ruling, as described above, resulting in a net charge of $26.6 for the twelve month period ended December 31, 2021, which was recorded to Selling, general and administrative expense on the Consolidated Statements of Operations.

From time to time, in the ordinary course of business and similar to others in the industry, the Company receives requests for information from government agencies in connection with their regulatory or investigational authority. Such requests can include subpoenas or demand letters for documents to assist the government in audits or investigations. The Company reviews such requests and notices and takes appropriate action. Additionally, the Company is subject to federal and state requirements
for protection of the environment, including those for disposal of hazardous waste and remediation of contaminated sites. As a result, the Company is required to participate in certain government investigations regarding environmental remediation actions.

In addition to the items addressed above, from time to time, the Company is subject to, and is presently involved in, litigation, legal proceedings, or other claims arising in the ordinary course of business. While the final outcome of these matters cannot be predicted with certainty, considering, among other things, the meritorious legal defenses available, the Company believes that, on a basis of information presently available, none of these items, when finally resolved, will have a material adverse effect on the Company’s long-term financial position or liquidity.

Customer and Vendor Claims

From time to time the Company receives, or is subject to, customer and vendor claims arising in the ordinary course of business, including, but not limited to, those related to product quality and late delivery. The Company accrues for matters when losses are deemed probable and reasonably estimable. In evaluating matters for accrual and disclosure purposes, the Company takes into consideration multiple factors including without limitation the Company's historical experience with matters of a similar nature, the specific facts and circumstances asserted, the likelihood of an unfavorable outcome, and the severity of any potential loss. Any accruals deemed necessary are reevaluated at least quarterly and updated as matters progress over time.

While the final outcome of these types of matters cannot be predicted with certainty, considering, among other things, the factual and legal defenses available, it is the opinion of the Company that, when finally resolved, no current claims will have a material adverse effect on the Company’s long-term financial position or liquidity. However, it is possible that the Company’s results of operations in a period could be materially affected by one or more of these other matters.

The Company has evaluated and refined management’s original estimate of costs related to rework on the B787 aircraft, including a preliminary assessment related to rework on the forward section of the fuselage, for which the Company identified an additional fit and finish issue in the three month period ended July 1, 2021. The Company continues to coordinate with Boeing to ensure that all necessary rework is performed. The Company cannot reasonably estimate the amount of any potential claims related to this issue at this time due to various reasons, including, among others: (i) that there is uncertainty that any such claim could be received, (ii) that there is uncertainty as to the outcome of any such claims, (iii) that there may be significant factual and/or commercial issues to be resolved, and (iv) that there may be novel legal issues presented.

Commitments
The Company's future aggregate capital commitments totaled $137.5 and $103.8 at December 31, 2021 and December 31, 2020, respectively.
Guarantees
Contingent liabilities in the form of letters of guarantee have been provided by the Company. Outstanding guarantees were $15.9 and $19.6 at December 31, 2021 and December 31, 2020, respectively.
Restricted Cash - Collateral Requirements
The Company was required to maintain $19.5 and $19.5 of restricted cash as of December 31, 2021 and December 31, 2020, respectively, related to certain collateral requirements for obligations under its workers’ compensation programs. Restricted cash is included in "Other assets" in the Company's Consolidated Balance Sheet.
Indemnification
The Company has entered into customary indemnification agreements with its non-employee directors, and its bylaws and certain executive employment agreements include indemnification and advancement provisions. Pursuant to the terms of the bylaws and, with respect to Jose Garcia, his employment agreement, the Company is providing Messrs. Garcia and Gilson and all other individual defendants with defense costs and provisional indemnity with respect to the Consolidated Class Action and Derivative Actions, as appropriate. Under the bylaws and any applicable agreements, the Company agrees to indemnify each of
these individuals against claims arising out of events or occurrences related to that individual’s service as the Company’s agent or the agent of any of its subsidiaries to the fullest extent legally permitted.

The Company has agreed to indemnify parties for specified liabilities incurred, or that may be incurred, in connection with transactions they have entered into with the Company. The Company is unable to assess the potential number of future claims that may be asserted under these indemnities, nor the amounts thereof (if any). As a result, the Company cannot estimate the maximum potential amount of future payments under these indemnities and therefore, no liability has been recorded.
Service and Product Warranties and Extraordinary Rework
Provisions for estimated expenses related to service and product warranties and certain extraordinary rework are evaluated on a quarterly basis. These costs are accrued and are recorded to unallocated cost of goods sold. These estimates are established using historical information on the nature, frequency, and average cost of warranty claims, including the experience of industry peers. In the case of new development products or new customers, the Company considers other factors including the experience of other entities in the same business and management judgment, among others. Service warranty and extraordinary work is reported in current liabilities and other liabilities on the balance sheet.

The warranty balance presented in the table below includes unresolved warranty claims that are in dispute in regards to their value as well as their contractual liability. The Company estimated the total costs related to some of these claims, however there is significant uncertainty surrounding the disposition of these disputed claims and as such, the ultimate determination of the provision’s adequacy requires significant management judgment. The amount of the specific provisions recorded against disputed warranty claims was $2.3 as of December 31, 2021 and $8.1 as of December 31, 2020. These specific provisions represent the Company’s best estimate of probable warranty claims. Should the Company incur higher than expected warranty costs and/or discover new or additional information related to these warranty provisions, the Company may incur additional charges that exceed these recorded provisions. The Company utilized available information to make appropriate assessments, however the Company recognizes that data on actual claims experience is of limited duration and therefore, claims projections are subject to significant judgment. The amount of the reasonably possible disputed warranty claims in excess of the specific warranty provision was $3.4 as of December 31, 2021 and $12.1 as of December 31, 2020.
The following is a roll forward of the service warranty and extraordinary rework balance at December 31, 2021, 2020 and 2019:
202120202019
Balance, January 1$76.9 $64.7 $104.8 
Charges to costs and expenses12.3 3.3 (13.9)
Payouts(17.7)(1.9)(1.7)
Impact of TGI Settlement(1)
— — (25.0)
Bombardier Acquisition(2)
— 10.3 — 
Exchange rate(0.2)0.5 0.5 
Balance, December 31$71.3 $76.9 $64.7 
_______________________________________

(1)Due to a settlement on outstanding warranty issues in the first quarter of 2019, $25.0 of warranty provision was reclassified to accounts payable and was paid in the second quarter of 2019.
(2)Warranty liabilities acquired in the Bombardier acquisition.
Bonds
Since its incorporation, Spirit has periodically utilized City of Wichita issued Industrial Revenue Bonds (“IRBs”) to finance self-constructed and purchased real property at its Wichita site. Tax benefits associated with IRBs include provisions for a ten-year complete property tax abatement and a Kansas Department of Revenue sales tax exemption on all IRB funded purchases. Spirit purchased these IRBs so they are bondholders and debtor / lessee for the property purchased with the IRB proceeds.
Spirit recorded the property net of a finance lease obligation to repay the IRB proceeds on its balance sheet. Gross assets and liabilities associated with these IRBs were $393.2 and $380.2 as of December 31, 2021 and December 31, 2020, respectively.
v3.22.0.1
Other Income (Expense), Net
 12 Months Ended
Dec. 31, 2021
Other Nonoperating Income (Expense) [Abstract]  
Other Income (Expense), Net Other Income (Expense), Net
Other income (expense), net is summarized as follows:
 For the Twelve Months Ended
 December 31, 2021December 31, 2020December 31, 2019
Kansas Development Finance Authority bond$2.8 $3.0 $3.7 
Pension income (loss)150.1 (36.8)19.5 
Interest income1.8 10.0 12.9 
Loss on foreign currency forward contract and interest rate swaps(1.0)(10.5)(19.0)
Loss on sale of accounts receivable(6.7)(8.9)(24.7)
Foreign currency losses1.4 (27.0)(12.3)
Litigation settlement— — 13.5 
Other(1.8)(7.6)0.6 
Total Other Income (Expense), net$146.6 $(77.8)$(5.8)

Foreign currency losses are due to the impact of movement in foreign currency exchange rates on an intercompany revolver and long-term contractual rights/obligations, as well as trade and intercompany receivables/payables that are denominated in a currency other than the entity’s functional currency.
Pension income for the twelve months ended December 31, 2021 includes $119.8 of income related to pension plans for current and former employees at the Belfast location, including the impact of the closure of the Shorts Pension which resulted in a curtailment gain of $61.0 for the twelve months ended December 31, 2021. See also Note 17 Pension and Other Post-Retirement Benefits. Pension expense for the twelve months ended December 31, 2020 and December 31, 2019 included $86.5 and $12.5 of expenses related to the voluntary retirement program, respectively.
v3.22.0.1
Significant Concentration of Risk
 12 Months Ended
Dec. 31, 2021
Risks and Uncertainties [Abstract]  
Significant Concentration Risk Significant Concentrations of Risk
Economic Dependence
The Company’s largest customer (Boeing) accounted for approximately 56%, 60%, and 79% of the revenues for the twelve months ended December 31, 2021, 2020, and 2019, respectively. Approximately 24% and 16% of the Company's accounts receivable balance at December 31, 2021, and 2020, respectively, was attributable to Boeing.
The Company’s second largest customer (Airbus) accounted for approximately 24%, 23%, and 16% of the revenues for the twelve months ended December 31, 2021, 2020, and 2019, respectively. Approximately 27% and 37% of the Company's accounts receivable balance at December 31, 2021, and 2020, respectively, was attributable to Airbus.
Employees
As of December 31, 2021, the Company had approximately 16,100 employees: 11,100 located in the Company's five U.S. facilities, 3,800 located at the U.K. facilities, 900 located in the Malaysia facility, 200 in Morocco, and 100 located in the France facility. Of the employees located in our five U.S. facilities noted above, 9,500 were located in Wichita, Kansas; 800 were located in Tulsa Oklahoma; 400 were located in Kinston, North Carolina; 300 were located in Biddeford, Maine and 100 were located in Dallas, Texas.
Approximately 83% of the Company’s U.S. employees are represented by unions. Approximately 55% of U.S. employees are represented by the International Association of Machinists and Aerospace Workers (IAM) collective bargaining agreement. There are two IAM collective bargaining agreements that will expire in June 2023 and December 2024. Approximately 21% of
the Company's U.S. employees are represented by the Society of Professional Engineering Employees in Aerospace (SPEEA) collective bargaining agreement. There are two SPEEA agreements that will expire in December 2024 and January 2026. Approximately 6% of the Company's U.S. employees are represented by the International Union, Automobile, Aerospace and Agricultural Implement Workers of America (UAW) collective bargaining agreement that will expire in December 2025. Approximately 1% of the Company's U.S. employees are represented by an International Brotherhood of Electrical Workers (IBEW) collective bargaining agreement that will expire in September 2023.
Approximately 92% of the Company's Prestwick employees are part of the collective bargaining group represented by one union, Unite (Amicus Section). In 2013, the Company negotiated two separate ten-year pay agreements with the Manual Staff bargaining and the Monthly Staff bargaining groups of the Unite union. These agreements fundamentally cover basic pay and variable at risk pay, while other employee terms and conditions generally remain the same from year to year until both parties agree to change them. The current pay agreements were set to expire December 31, 2022. In the first quarter of 2021, the Company negotiated and agreed with Unite, a three-year extension to the pay agreements which will run from January 2023 and expire in December 2025. The elements of the contract extension remain the same as those in the ten-year agreements.

In U.K. (Belfast), approximately 84% of the employees are part of the collective group represented by the Trade Unions. Unite the Union is the largest representing approximately 93% of such employees, with General, Municipal, Boilermakers making up the balance. The last wage agreement covered the period from January 2016 to January 2019. No negotiations were held in 2020 due to the impact of COVID-19 and the acquisition of Shorts Brothers plc in late October 2020. Negotiations commenced in late 2021 and are ongoing.

In France, the Company's employees are represented by CFTC (“Confédération Française des Travailleurs Chrétiens or French Confederation of Christian Workers”) and FO (“Force Ouvrière or Labor Force”). The Company negotiates yearly on compensation and once every four years on issues related to gender equality and work-life balance. The next election to determine union representation will occur in July 2023.

In Morocco, approximately 65% of the Company's employees are represented by UMT (“Union Marocain du Travail”). The Company negotiated a three year agreement which will expire in December 2022.
None of the Company's Malaysia employees are currently represented by a union.
v3.22.0.1
Supplemental Balance Sheet Information
 12 Months Ended
Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]  
Supplemental Balance Sheet Information Supplemental Balance Sheet Information
Accrued expenses and other liabilities consist of the following:
December 31, 2021December 31, 2020
Accrued expenses 
Accrued wages and bonuses$49.8 $41.1 
Accrued fringe benefits104.3 103.0 
Accrued payroll taxes24.0 23.7 
Accrued interest34.9 29.1 
Workers' compensation7.6 7.7 
Property and sales tax25.4 47.2 
Warranty/extraordinary rework reserve — current2.9 2.1 
Former executive officer liability(4)
44.8 — 
Other(1)
82.4 111.7 
Total$376.1 $365.6 
Other liabilities 
Repayable investment agreement(2)
$301.9 $307.2 
Warranty/extraordinary rework reserve - non-current68.4 74.8 
Other(3)
53.6 55.0 
Total$423.9 $437.0 
v3.22.0.1
Segment Information
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Segment Information Segment and Geographical Information
On September 30, 2021, the Company announced a new organizational structure to focus on growth in the key markets it serves. The new organizational structure and leadership changes to support the new structure became effective October 1, 2021. The Notes to the Consolidated Financial Statements within this report are based on the new organizational structure for all periods presented, where applicable. Prior period amounts have been reclassified to conform to the new segment presentation in the table below.

The Company operates in three principal segments: Commercial, Defense & Space and Aftermarket. Approximately 80% of the Company's net revenues for the twelve months ended December 31, 2021 came from the Company's two largest customers, Boeing and Airbus. Boeing represents a substantial portion of our revenues across segments. Airbus also represent a substantial portion of revenues in the Commercial segment. The Company's primary profitability measure to review a segment’s operating performance is segment operating income before corporate selling, general and administrative expenses, research and development and unallocated cost of sales.
Corporate selling, general and administrative expenses include centralized functions such as accounting, treasury and human resources that are not specifically related to the Company's operating segments and are not allocated in measuring the operating segments’ profitability and performance and net profit margins. Research and development includes research and development efforts that benefit the Company as a whole and are not unique to a specific segment. Unallocated cost of sales includes general costs not directly attributable to segment operations, such as warranty, early retirement and other incentives. All of these items are not specifically related to the Company’s operating segments and are not utilized in measuring the operating segments’ profitability and performance.
The Company’s Commercial segment includes design and manufacturing of forward, mid and rear fuselage sections and systems, struts/pylons, nacelles (including thrust reversers) and related engine structural components, wings and wing components (including flight control surfaces), as well as other miscellaneous structural parts for large commercial aircraft and/or business/regional jets. Sales from this segment are primarily to the aircraft OEMs or engine OEMs of large commercial aircraft and/or business/regional jet programs. Approximately 60%, 64%, and 81% of Commercial segment net revenues came from the Company's contracts with Boeing for the twelve months ended December 31, 2021, 2020, and 2019, respectively. Approximately 30%, 28%, and 17% of Commercial segment net revenues came from the Company's contracts with Airbus for the twelve months ended December 31, 2021, 2020, and 2019, respectively. The Commercial segment manufactures products at the Company's facilities in Wichita, Kansas; Tulsa, Oklahoma; Kinston, North Carolina; Prestwick, Scotland; Casablanca, Morocco; Belfast, Northern Ireland; and Subang, Malaysia.  The Commercial segment also includes an assembly plant for the A350 XWB aircraft in Saint-Nazaire, France.
The Company's Defense & Space segment includes design and manufacturing of fuselage, strut, nacelle, and wing aerostructures (primarily) for U.S. Government defense programs, including Boeing P-8, C40, and KC-46 Tanker, which are commercial aircraft that are modified for military use. The segment also includes fabrication, bonding, assembly, testing tooling, processing, engineering analysis, and training on fixed wing aircraft aerostructures, missiles and hypersonics work, including solid rocket motor throats and nozzles and re-entry vehicle thermal protections systems, and forward cockpit and cabin, and fuselage work on rotorcraft aerostructures. Sales from this segment are primarily to the prime contractors on various U.S. Government defense program contracts for which the Company is a sub-contractor. A significant portion of our Defense & Space segment revenues are represented by defense business that is classified by the U.S. Government and cannot be specifically described. Approximately 36%, 28%, and 53% of Defense & Space segment net revenues came from the Company's contracts with an individual customer for the twelve months ended December 31, 2021, 2020, and 2019, respectively. In addition, a customer accounted for approximately 39%, 44%, and 39% of Defense & Space segment net revenues for the twelve months ended December 31, 2021, 2020, and 2019, respectively. The Defense & Space segment manufactures products at the Company's facilities in Wichita, KS; Tulsa, OK; Biddeford, ME; Belfast, Northern Ireland; and Prestwick, Scotland.

The Company's Aftermarket segment includes design, manufacturing, and marketing of spare parts and MRO services, repairs for flight control surfaces and nacelles, radome repairs, rotable assets, engineering services, advanced composite repair, and other repair and overhaul (MRO) services. Approximately 44%, 80%, and 85% of Aftermarket segment net revenues came from the Company's contracts with a single customer for the twelve months ended December 31, 2021, 2020, and 2019, respectively. The Aftermarket segment manufactures products at the Company's facilities in Wichita, KS; Tulsa, OK; Kinston, North Carolina; Dallas, TX; Prestwick, Scotland; Casablanca, Morocco; and Belfast, Northern Ireland.
 The Company’s segments are consistent with the organization and responsibilities of management reporting to the chief operating decision-maker for the purpose of assessing performance. The Company’s definition of segment operating income differs from Operating income as presented in its primary financial statements and a reconciliation of the segment and consolidated results is provided in the table set forth below.
 While some working capital accounts are maintained on a segment basis, much of the Company’s assets are not managed or maintained on a segment basis. Property, plant and equipment, including tooling, is used in the design and production of products for each of the segments and, therefore, is not allocated to any individual segment. In addition, cash, prepaid expenses, other assets, and deferred taxes are managed and maintained on a consolidated basis and generally do not pertain to any particular segment. Raw materials and certain component parts are used in aerostructure production across all segments. Work-in-process inventory is identifiable by segment, but is managed and evaluated at the program level. As there is no segmentation of the Company’s productive assets, depreciation expense (included in fixed manufacturing costs and selling, general and administrative expenses) and capital expenditures, no allocation of these amounts has been made solely for purposes of segment disclosure requirements.
The following table shows segment revenues and operating income for the twelve months ended December 31, 2021, 2020 and 2019:
Twelve Months Ended December 31, 2021Twelve Months Ended December 31, 2020Twelve Months Ended December 31, 2019
Segment Revenues   
Commercial$3,128.1 $2,711.3 $7,169.6 
Defense & Space585.0 491.3 507.5 
Aftermarket239.9 202.2 186.0 
$3,953.0 $3,404.8 $7,863.1 
Segment Operating (loss) income (1)
  
Commercial(2)
$(220.6)$(620.6)$968.4 
Defense & Space(3)
44.3 47.0 73.5 
Aftermarket(4)
50.3 37.0 34.8 
(126.0)(536.6)1,076.7 
Corporate SG&A(279.9)(237.4)(261.4)
Research and development(53.3)(38.8)(54.5)
Total operating (loss) income$(459.2)$(812.8)$760.8 
_______________________________________
(1)Inclusive of forward losses, changes in estimate on loss programs and cumulative catch-up adjustments. These changes in estimates for the periods ended December 31, 2021, 2020, and 2019 are further detailed in Note 5, Changes in Estimates.
(2)The year ended December 31, 2021 includes excess capacity production costs of $206.7 related to the temporary B737 MAX and A220 production schedule changes, abnormal costs of $12.0 for workforce adjustments as a result of COVID-19 production pause, net of U.S. employee retention credit and U.K. government subsidies, $6.8 of restructuring costs, and a $35.9 offset related to partial recognition of the Aviation Manufacturing Jobs Protection Program grant which was awarded in the current year. The year ended December 31, 2020 includes excess capacity production costs of $265.5 related to the temporary B737 MAX and A220 production schedule changes, abnormal costs of $33.7 for workforce adjustments as a result of COVID-19 production pause, net of U.S. employee retention credit and U.K. government subsidies, and $64.0 of restructuring costs.

(3)The year ended December 31, 2021 includes excess capacity production costs of $10.8, $1.1 of restructuring costs, and a $3.0 offset related to partial recognition of the Aviation Manufacturing Jobs Protection Program grant which was awarded in the current year. The year ended December 31, 2020 includes excess capacity production costs of $13.4 related to the temporary B737 production schedule changes, and $3.8 of restructuring costs.

(4)The year ended December 31, 2021 includes $0.3 restructuring costs, and a $2.2 offset to costs related to partial recognition of the Aviation Manufacturing Jobs Protection Program grant which was awarded in the current year The year ended December 31, 2020 includes $5.2 of restructuring costs.
Most of the Company’s revenue is obtained from sales inside the U.S. However, the Company does generate international sales, primarily from sales to Airbus. The following chart illustrates the split between domestic and foreign revenues:
 Year Ended December 31, 2021Year Ended December 31, 2020Year Ended December 31, 2019
Revenue Source(1)
Net RevenuesPercent of
Total
Net Revenues		Net RevenuesPercent of
Total
Net Revenues		Net RevenuesPercent of
Total
Net Revenues
United States$2,822.2 71 %$2,637.6 77 %$6,566.3 84 %
International 
United Kingdom580.4 15 %433.5 13 %771.9 10 %
Other550.4 14 %333.7 10 %524.9 6 %
Total International1,130.8 29 %767.2 23 %1,296.8 16 %
Total Revenues$3,953.0 100 %$3,404.8 100 %$7,863.1 100 %
_______________________________________

(1)Net Revenues are attributable to countries based on destination where goods are delivered.
As of December 31, 2021, most of the Company’s property, plant and equipment are located within the U.S. Approximately 19% of the Company's property, plant and equipment based on book value are located in the U.K. with approximately another 4% of the Company's total property, plant and equipment located in countries outside the U.S. and the U.K. The following chart illustrates the split between domestic and foreign assets:
 Year Ended December 31, 2021Year Ended December 31, 2020Year Ended December 31, 2019
Asset LocationTotal
PPE		Percent of
PPE		Total
PPE		Percent of
Total
PPE		Total
PPE		Percent of
Total
PPE
United States$1,833.7 77 %$1,931.0 77 %$2,079.4 92 %
International 
United Kingdom451.3 19 %466.2 19 %112.4 5 %
Other100.5 4 %106.6 4 %79.9 3 %
Total International551.8 23 %572.8 23 %192.3 8 %
Total Property, Plant & Equipment$2,385.5 100 %$2,503.8 100 %$2,271.7 100 %
v3.22.0.1
Summary of Significant Accounting Policies (Policies)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Revenue Recognition, Long-term Contracts [Policy Text Block]
Revenues and Profit Recognition
Substantially all of the Company’s revenues are from long-term supply agreements with Boeing, Airbus, and other aerospace manufacturers. The Company participates in its customers’ programs by providing design, development, manufacturing, fabrication, and support services for major aerostructures in the commercial, defense and space, and aftermarket segments. During the early stages of a program, this frequently involves nonrecurring design and development services, including tooling. As the program matures, the Company provides recurring manufacturing of products in accordance with customer design and schedule requirements. Many contracts include clauses that provide sole supplier status to the Company for the duration of the program’s life (including derivatives). The Company's long-term supply agreements typically include fixed price volume-based terms and require the satisfaction of performance obligations for the duration of the program’s life.

The identification of an accounting contract with a customer and the related promises require an assessment of each party’s rights and obligations regarding the products or services to be transferred, including an evaluation of termination clauses and presently enforceable rights and obligations. In general, these long-term supply agreements are legally governed by master supply agreements (or general terms agreements) together with special business provisions (or work package agreements), which define specific program requirements. Purchase orders (or authorizations to proceed) are issued under these agreements to reflect presently enforceable rights and obligations for the units of products and services being purchased. The units for accounting purposes (“accounting contract”) are typically determined by the purchase orders. Revenue is recognized when the Company has a contract with presently enforceable rights and obligations, including an enforceable right to payment for work performed. These agreements may lead to continuing sales for more than twenty years. Customers generally contract with the Company for requirements relating to a specific program, and the Company’s performance obligations consist of a wide range of engineering design services and manufactured structural components, as well as spare parts and repairs for OEMs. A single program may result in multiple contracts for accounting purposes, and within the respective contracts, non-recurring work elements and recurring work elements may result in multiple performance obligations. The Company generally contracts directly with its customers and is the principal in all current contracts.

Management considers a number of factors when determining the existence of an accounting contract and the related performance obligations that include, but are not limited to, the nature and substance of the business exchange, the contractual terms and conditions, the promised products and services, the termination provisions in the contract, including the presently enforceable rights and obligations of the parties to the contract, the nature and execution of the customer’s ordering process and how the Company is authorized to perform work, whether the promised products and services are distinct or capable of being distinct within the context of the contract, as well as how and when products and services are transferred to the customer.

Revenue is recognized when, or as, control of promised products or services transfers to a customer and is recognized in an amount that reflects the consideration that the Company expects to receive in exchange for those products or services. Revenue is recognized over time as work progresses when the Company is entitled to the reimbursement of costs plus a reasonable profit for work performed for which the Company has no alternate use. For these performance obligations that are satisfied over time,
the Company generally recognizes revenue using an input method with revenue amounts being recognized proportionately as costs are incurred relative to the total expected costs to satisfy the performance obligation. The Company believes that costs incurred as a portion of total estimated costs is an appropriate measure of progress towards satisfaction of the performance obligation since this measure reasonably depicts the progress of the work effort. When the Company experiences abnormal production costs such as excess capacity costs the Company will expense the costs in the period incurred separately from the costs incurred for satisfaction of the performance obligations under the Company's contracts with customers.

Revenue for performance obligations that are not recognized over time are recognized at the point in time when control transfers to the customer. For performance obligations that are satisfied at a point in time, the Company evaluates the point in time when the customer can direct the use of, and obtain the benefits from, the products and services. Shipping and handling costs are not considered performance obligations and are included in cost of sales as incurred.

The transaction price for a contract reflects the consideration the Company expects to receive for fully satisfying the performance obligations in the contract. The Company’s current contracts do not include any significant financing components because the timing of the transfer of the underlying products and services under contract are at the customers’ discretion. Additionally, the Company does not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the entity transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. The Company's contracts with customers generally require payment under normal commercial terms after delivery. Payment terms are typically within 30 to 120 days of delivery. The total transaction price is allocated to each of the identified performance obligations using the relative standalone selling price to reflect the amount the Company expects to be entitled for transferring the promised products and services to the customer.

Standalone selling price is the price at which the Company would sell a promised good or service separately to a customer. Standalone selling prices are established at contract inception and subsequent changes in transaction price are allocated on the same basis as at contract inception. Standalone selling prices for the Company’s products and services are generally not observable and the Company uses the “Expected Cost plus a Margin” approach to determine standalone selling price. Expected costs are typically derived from the available periodic forecast information. If a contract modification changes the overall transaction price of an existing contract, the Company allocates the new transaction price on the basis of the relative standalone selling prices of the performance obligations and cumulative adjustments, if any, are recorded in the current period.

The Company also identifies and estimates variable consideration for contractual provisions such as unpriced contract modifications, cost sharing provisions, incentives and awards, non-warranty claims and assertions, provisions for non-conformance and rights to return, or other payments to, or receipts from, customers and suppliers. The timing of satisfaction of performance obligations and actual receipt of payment from a customer may differ and affects the balances of the contract assets and liabilities.

For contracts that are deemed to be loss contracts, the Company establishes forward loss reserves for total estimated costs that are in excess of total estimated consideration in the period in which they become known. These reserves are based on estimates for accounting contracts, plus options that the Company believes are likely to be exercised. The Company records forward loss reserves for all performance obligations in the aggregate for the accounting contract.
Property, Plant and Equipment [Line Items]  
Use of Estimates, Policy [Policy Text Block]
Use of Estimates
The preparation of the Company's financial statements in conformity with GAAP requires management to use estimates and assumptions. The results of these estimates form the basis for making judgments that may affect the reported amounts of assets and liabilities, including the impacts of contingent assets and liabilities, and the reported amounts of revenue and expenses during the reporting period.

Management may make significant judgments when assessing estimated amounts of variable consideration and related constraints, the number of options likely to be exercised, and the standalone selling prices of the Company’s products and services. The Company also estimates the cost of satisfying the performance obligations in its contracts and options that may extend over many years. Cost estimates reflect currently available information and the impact of any changes to cost estimates, based upon the facts and circumstances, are recorded in the period in which they become known.

The transaction price for a contract reflects the consideration the Company expects to receive for fully satisfying the performance obligations in the contract. The Company’s contracts with customers are typically for products and services to be provided at fixed stated prices but may also include variable consideration. Variable consideration may include, but is not limited to, unpriced contract modifications, cost sharing provisions, incentives and awards, non-warranty claims and assertions, provisions for non-conformance and rights to return, or other payments to, or receipts from, customers. The Company estimates the variable consideration using the expected value or the most likely amount based upon the facts and circumstances, available data and trends and the history of resolving variability with specific customers and suppliers.

The Company regularly commences work and incorporates customer-directed changes prior to negotiating pricing terms for engineering work, product modifications, and other statements of work. The Company's contractual terms typically provide for price negotiations after certain customer-directed changes have been accepted by the Company. Prices are estimated until they are contractually agreed upon with the customer. When a contract is modified, the Company evaluates whether additional distinct products and services have been promised at standalone selling prices, in which case the modification is treated as a separate contract. If not, depending on whether the remaining performance obligations are distinct from the goods or services transferred on or before the modification, the modification is either treated prospectively as if it were a termination of the existing contract and the creation of a new contract, treated as if it were a part of the existing contract, or treated as some combination.
The Company allocates the consideration for a contract to the performance obligations on the basis of their relative standalone selling price. The Company estimates the likelihood of the amount of options that the customer is going to exercise when assessing the impact of loss contracts.

The Company typically provides warranties on all the Company's products and services. Generally, warranties are not priced separately and customers cannot purchase them independently of the products or services under contract, so they do not create performance obligations. The Company's warranties generally provide assurance to the Company's customers that the products or services meet the specifications in the contract. In the event that there is a warranty claim because of a covered design, material or workmanship issue, the Company may be required to redesign or modify the product, offer concessions, and/or pay the customer for repairs or perform the repair. Provisions for estimated expenses related to design, service, and product warranties and certain extraordinary rework are made at the time products are sold. These costs are accrued at the time of the sale and are recorded as unallocated cost of sales. These estimates are established using historical information on the nature, frequency, and the cost experience of warranty claims, including the experience of industry peers. In the case of new development products or new customers, the Company also considers factors including the warranty experience of other entities in the same business, management judgment, and the type and nature of the new product or new customer, among others.
Actual results could differ from those estimates and assumptions.
Basis of Presentation and Significant Accounting Policies [Text Block]
Basis of Presentation
The accompanying consolidated financial statements include the Company’s financial statements and the financial statements of its majority owned or controlled subsidiaries and have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) and Regulation S-X. All intercompany balances and transactions have been eliminated in consolidation.
Spirit is the majority participant in the Kansas Industrial Energy Supply Company ("KIESC"), a tenancy-in-common with other Wichita companies established to purchase natural gas. KIESC is fully consolidated as the Company owns 77.8% of the entity’s equity.
The Company’s U.K. subsidiary in Prestwick uses local currency, the British pound sterling, as its functional currency, and the Malaysian subsidiary also uses the British pound sterling as its functional currency. All other foreign subsidiaries and branches use the U.S. dollar as their functional currency. As part of the monthly consolidation process, the functional currencies of the Company’s international subsidiaries are translated to U.S. dollars using the end-of-month translation rate for assets and liabilities and average period currency translation rates for revenue and income accounts.
Research and Development
Research and Development
Research and development includes costs incurred for experimentation, design, and testing that are expensed as incurred.
Cash and Cash Equivalents
Cash and Cash Equivalents
Cash and cash equivalents represent all highly liquid investments with original maturities of three months or less.
Accounts Receivable
Accounts Receivable
Accounts receivable are recorded at the invoiced amount and do not bear interest. Unbilled receivables are recorded on the balance sheet as contract assets, as per ASC 606 guidance. Beginning January 1, 2020, management assesses and records an allowance for credit losses on financial assets within the scope of ASU 2016-13 using the CECL model. Prior periods allowance for credit losses were based on a review of outstanding receivables that are charged off against the allowance after the potential for recovery is considered remote in accordance with legacy GAAP. The amount necessary to adjust the allowance
for credit losses to management’s current estimate, as of the reporting date, on these assets is recorded in net income as credit loss expense. All credit losses reported in accordance with ASU 2016-13 were on trade receivables and/or contract assets arising from the Company’s contracts with customers. See Note 6, Accounts Receivable, net, for more information.The Company has three agreements to sell, on a revolving basis, certain trade accounts receivable balances with Boeing, Airbus, and Rolls-Royce to a third party financial institution. These programs were primarily entered into as a result of customers seeking payment term extensions with the Company and continue to allow the Company to monetize the receivables prior to the payment date, subject to payment of a discount. No guarantees are delivered under the agreements. The Company's ability to continue using such agreements is primarily dependent upon the strength of Boeing’s and Airbus’s financial condition. Transfers under this agreement are accounted for as sales of receivables resulting in the receivables being de-recognized from the Company's balance sheet. For additional information on the sale of receivables see Note 6, Accounts Receivable, net.
Inventory Inventory Raw materials are stated at lower of cost (principally on an actual or average cost basis) or net realizable value. Production costs for contracts, including costs expected to be recovered on specific anticipated contracts (work that has commenced because the Company expects the customer to exercise options), are classified as work-in-process and include direct material, labor, overhead, and purchases. Typically, anticipated contracts materialize and the related performance obligations are satisfied within 6-12 months. These costs are evaluated for impairment periodically and capitalized costs for which anticipated contracts do not materialize are written off in the period in which it becomes known. Revenue and related cost of sales are recognized as the performance obligations are satisfied. When the Company experiences abnormal production costs such as excess capacity costs the Company will expense the costs in the period incurred and these costs are excluded from inventoriable costs. Valuation reserves for excess, obsolete, and slow-moving inventory are estimated by evaluating inventory of individual raw materials and parts against both historical usage rates and forecasted production requirements. See Note 9, Inventory.
Property, Plant and Equipment
Property, Plant and Equipment
Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation is applied using a straight-line method over the useful lives of the respective assets as described in the following table:
 Estimated Useful Life
Land improvements20 years
Buildings45 years
Machinery and equipment3-20 years
Tooling — Airplane program — B787, Rolls-Royce5-20 years
Tooling — Airplane program — all others2-10 years
Capitalized software3-7 years
The Company capitalizes certain costs, such as software coding, installation, and testing, that are incurred to purchase or to create and implement internal-use computer software. The Company’s capitalization policy includes specifications that the software must have a service life greater than one year, is legally and substantially owned by the Company, and has an acquisition cost of greater than $0.1. The Company applies the same criteria for capitalizing implementation costs incurred in a cloud computing arrangement hosted by the vendor.
Where the Company is involved in build-to-suit leasing arrangements, the Company is deemed the owner of the asset for accounting purposes during the construction period of the asset. The Company records the related assets and liabilities for construction costs incurred under these build-to-suit leasing arrangements during the construction period. Upon completion of the asset, the Company considers whether the assets and liabilities qualify for derecognition under the sale-leaseback accounting guidance. See Note 10, Property, Plant and Equipment, net.
Impairment or Disposal of Long-Lived Assets, and Goodwill Impairment or Disposal of Long-Lived AssetsThe Company reviews capital and amortizing intangible assets (long-lived assets) for impairment whenever events or changes in circumstances indicate that the recorded amount may not be recoverable. Assets are classified as either held-for-use or available-for-sale. For held-for-use assets, if indicators are present, we perform a recoverability test by comparing the sum of the estimated undiscounted future cash flows attributable to the asset group in question to its carrying amount. If the undiscounted cash flows used in the recoverability test are less than the long-lived asset group’s carrying amount, we determine the fair value of the long-lived asset group and recognize an impairment loss if the carrying amount of the long-lived asset group exceeds its fair value. For assets available-for-sale, a loss is recognized when the recorded amount exceeds the fair value less cost to sell.
Derivative Instruments and Hedging Activities Derivative Instruments and Hedging ActivityThe Company uses derivative financial instruments to manage the economic impact of fluctuations in currency exchange rates and interest rates. Derivative financial instruments are recognized on the balance sheet as either assets or liabilities and are measured at fair value. Changes in fair value of derivatives are recorded each period in earnings or accumulated other comprehensive income, depending on whether the Company elected hedge accounting and whether a derivative is effective as part of a hedge transaction, and if it is, the type of hedge transaction. Gains and losses on derivative instruments reported in other comprehensive income are subsequently included in earnings in the periods in which earnings are affected by the hedged item or when the hedge is no longer effective. Cash flows associated with the Company’s derivatives are presented as a component of the operating section of the statement of cash flows. The use of derivatives has generally been limited to interest rate swaps and foreign currency forward contracts. The Company enters into foreign currency forward contracts to reduce the risks associated with the changes in foreign exchange rates on sales and cost of sales denominated in currencies other than the entities’ functional currency
Fair Value of Financial Instruments
Fair Value of Financial Instruments
Financial instruments are measured in accordance with FASB authoritative guidance related to fair value measurements. This guidance clarifies the definition of fair value, prescribes methods for measuring fair value, establishes a fair value hierarchy based on the inputs used to measure fair value, and expands disclosures about fair value measurements. See Note 14, Fair Value Measurements.
Income Taxes
Income Taxes
Income taxes are accounted for in accordance with FASB authoritative guidance on accounting for income taxes. Deferred income tax assets and liabilities are recognized for the future income tax consequences attributable to differences between the financial statement carrying amounts for existing assets and liabilities and their respective tax bases. Tax rate changes impacting these assets and liabilities are recognized in the period during which the rate change occurs.
Deferred tax assets are periodically evaluated to determine their recoverability and whether or not a valuation allowance is necessary. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. When determining the amount of net deferred tax assets that are more likely than not to be realized, the Company assesses all available positive and negative evidence. The weight given to the positive and negative evidence is commensurate with the extent to which the evidence may be objectively verified.
This assessment is completed on a taxing jurisdiction and entity filing basis. Based on these criteria and the relative weighting of both the positive and negative evidence available, and in particular the activity surrounding the Company’s prior earnings history including the forward losses previously recognized in the U.S. and U.K., management determined that it was necessary to establish a valuation allowance against nearly all of its net U.S. and U.K. deferred tax assets at December 31, 2020. This determination was made as the Company entered into a U.S. cumulative loss position during the first half of 2021, as prior period positive earnings fell outside of the three-year measurement period. Additionally, entities of the U.K. operations are in cumulative loss positions after the inclusion of 2020 and 2021 losses and the Company anticipates that all U.K. entities will be in cumulative loss positions during the first half of 2022. Once a company anticipates a cumulative three year loss position, there is a presumption that a company should no longer rely solely on projected future income in determining whether the deferred tax asset is more likely than not to be realized.
The Company records income tax provision or benefit based on the net income earned or net loss incurred in each tax jurisdiction and the tax rate applicable to that income or loss. In the ordinary course of business, there are transactions for which the ultimate tax outcome is uncertain. These uncertainties are accounted for in accordance with FASB authoritative guidance on accounting for the uncertainty in income taxes. The final tax outcome for these matters may be different than management's original estimates made in determining the income tax provision. A change to these estimates could impact the effective tax rate and net income or loss in subsequent periods. The Company uses the flow-through accounting method for tax credits. Under this method, tax credits reduce income tax expense. See Note 20, Income Taxes, for further discussion.
Stock-Based Compensation and Other Share-based Payments Stock-Based Compensation and Other Share-Based PaymentsMany of the Company’s employees are participants in the Omnibus Incentive Plan of 2014 (as amended, the “Omnibus Plan”). The expense attributable to the Company’s employees is recognized over the period the amounts are earned and vested, as described in Note 19, Stock Compensation.
Business Combinations Policy The Company accounts for business combinations in accordance with ASC Topic 805, Business Combinations. Transaction costs related to business combinations are expensed as incurred. Assets acquired and liabilities assumed are measured and recognized based on their estimated fair values at the acquisition date, any excess of the purchase consideration when compared to the fair value of the net tangible and intangible assets acquired is recorded as goodwill. Determining the fair value of assets acquired and liabilities assumed requires significant judgment, including the amount and timing of expected future cash flows, long-term growth rates and discount rates. In some cases, the Company uses discounted cash flow analyses, which are based on estimates of future sales, earnings and cash flows after considering such factors as general market conditions, customer budgets, existing firm and future orders, changes in working capital, long term business plans and recent operating performance. If the initial accounting for the business combination is incomplete by the end of the reporting period in which the acquisition occurs, the business combination is recorded and disclosed on a preliminary basis. Subsequent to the acquisition date, and not later than one year from the acquisition date, adjustments to the initial preliminary recognized amounts are recorded to the extent new information is obtained about the measurement of assets and liabilities that existed as of the date of the acquisition.
Goodwill and Intangible Assets, Goodwill, Policy The Company assesses goodwill for impairment annually as of the first day of the fourth quarter or more frequently if events or circumstances indicate that the fair value of a reporting unit that includes goodwill may be lower than its carrying value. The Company tests goodwill for impairment by performing a qualitative assessment or quantitative test at the reporting unit level. In performing a qualitative assessment, the Company evaluates company-specific, market and industry, economic, and other relevant factors that may impact the fair value of reporting units or the carrying value of the net assets of the respective reporting unit. If it is determined that it is more likely than not that the carrying value of the net assets is more than the fair value of the respective reporting unit, then a quantitative test is performed, the Company may in any event opt to bypass the qualitative assessment at the annual assessment date and perform a quantitative assessment. Where the quantitative test is used, the Company compares the carrying value of net assets to the estimated fair value of the respective reporting unit. If the fair value is determined to be less than carrying value, a goodwill impairment loss is recognized for the amount that the carrying amount of the reporting unit, including goodwill, exceeds its fair value, limited to the total amount of goodwill allocated to that reporting unit.
v3.22.0.1
Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Schedule of Estimated Useful Life
Property, Plant and Equipment
Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation is applied using a straight-line method over the useful lives of the respective assets as described in the following table:
 Estimated Useful Life
Land improvements20 years
Buildings45 years
Machinery and equipment3-20 years
Tooling — Airplane program — B787, Rolls-Royce5-20 years
Tooling — Airplane program — all others2-10 years
Capitalized software3-7 years
The Company capitalizes certain costs, such as software coding, installation, and testing, that are incurred to purchase or to create and implement internal-use computer software. The Company’s capitalization policy includes specifications that the software must have a service life greater than one year, is legally and substantially owned by the Company, and has an acquisition cost of greater than $0.1. The Company applies the same criteria for capitalizing implementation costs incurred in a cloud computing arrangement hosted by the vendor.
Where the Company is involved in build-to-suit leasing arrangements, the Company is deemed the owner of the asset for accounting purposes during the construction period of the asset. The Company records the related assets and liabilities for construction costs incurred under these build-to-suit leasing arrangements during the construction period. Upon completion of the asset, the Company considers whether the assets and liabilities qualify for derecognition under the sale-leaseback accounting guidance. See Note 10, Property, Plant and Equipment, net.
v3.22.0.1
Changes in Estimates Changes in Estimate (Tables)
 12 Months Ended
Dec. 31, 2021
Change in Accounting Estimate [Line Items]  
Schedule of Change in Accounting Estimate [Table Text Block]
Changes in EstimatesDecember 31, 2021December 31, 2020December 31, 2019
(Unfavorable) Favorable Cumulative Catch-up Adjustments by Segment
Commercial(5.7)(28.9)(4.5)
Defense & Space0.7 (1.5)2.5 
Aftermarket— — — 
Total (Unfavorable) Favorable Cumulative Catch-up Adjustment$(5.0)$(30.4)$(2.0)
(Forward Loss) and Changes in Estimates on Loss Programs by Segment
Commercial(227.3)(366.8)(63.5)
Defense & Space(14.2)(3.5)— 
Aftermarket— — — 
Total (Forward Loss) and Change in Estimate on Loss Program$(241.5)$(370.3)$(63.5)
Total Change in Estimate$(246.5)$(400.7)$(65.5)
EPS Impact (diluted per share based on statutory tax rate)$(2.29)$(3.07)$(0.50)
v3.22.0.1
Accounts Receivable, net (Tables)
 12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Accounts Receivable, Net
Accounts receivable, net consists of the following:
December 31,
2021		December 31,
2020
Trade receivables$412.0 $458.9 
Other58.1 31.1 
Less: allowance for credit losses(8.5)(5.6)
Accounts receivable, net$461.6 $484.4 
_______________________________________
v3.22.0.1
Revenue Disaggregation and Outstanding Performance Obligations (Tables)
 12 Months Ended
Dec. 31, 2021
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue [Table Text Block]
The following table disaggregates revenues by the method of performance obligation satisfaction:

 For the Twelve Months Ended
RevenueDecember 31,
2021		December 31,
2020
Contracts with performance obligations satisfied over time$3,040.3 $2,188.4 
Contracts with performance obligations satisfied at a point in time912.7 1,216.4 
Total Revenue$3,953.0 $3,404.8 

The following table disaggregates revenue by major customer:
For the Twelve Months Ended
CustomerDecember 31,
2021		December 31,
2020
Boeing$2,206.0 $2,043.8 
Airbus945.6 773.3 
Other801.4 587.7 
Total net revenues$3,953.0 $3,404.8 


The following table disaggregates revenue based upon the location where control of products are transferred to the customer:
For the Twelve Months Ended
LocationDecember 31,
2021		December 31,
2020
United States$2,822.2 $2,637.6 
International 
United Kingdom580.4 433.5 
Other550.4 333.7 
Total International1,130.8 767.2 
Total Revenue$3,953.0 $3,404.8 
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] 8.  Revenue Disaggregation and Outstanding Performance Obligations
Disaggregation of Revenue
The Company disaggregates revenue based on the method of measuring satisfaction of the performance obligation either over time or at a point in time. Additionally, the Company disaggregates revenue based upon the location where products and services are transferred to the customer, and based upon major customer. The Company’s principal operating segments and related revenue are noted in Note 26, Segment and Geographical Information.

The following table disaggregates revenues by the method of performance obligation satisfaction:

 For the Twelve Months Ended
RevenueDecember 31,
2021		December 31,
2020
Contracts with performance obligations satisfied over time$3,040.3 $2,188.4 
Contracts with performance obligations satisfied at a point in time912.7 1,216.4 
Total Revenue$3,953.0 $3,404.8 

The following table disaggregates revenue by major customer:
For the Twelve Months Ended
CustomerDecember 31,
2021		December 31,
2020
Boeing$2,206.0 $2,043.8 
Airbus945.6 773.3 
Other801.4 587.7 
Total net revenues$3,953.0 $3,404.8 


The following table disaggregates revenue based upon the location where control of products are transferred to the customer:
For the Twelve Months Ended
LocationDecember 31,
2021		December 31,
2020
United States$2,822.2 $2,637.6 
International 
United Kingdom580.4 433.5 
Other550.4 333.7 
Total International1,130.8 767.2 
Total Revenue$3,953.0 $3,404.8 

Remaining Performance Obligations
Unsatisfied, or partially unsatisfied, performance obligations currently under contract that are expected to be recognized to revenue in the future are noted in the table below. The Company expects options to be exercised in addition to the amounts presented below.

2022202320242025 and After
Unsatisfied performance obligations$3,472.2$4,293.3$2,934.7$614.4
v3.22.0.1
Inventory (Tables)
 12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Summary Of Inventories
December 31, 2021December 31, 2020
Raw materials$301.4 $337.3 
Work-in-process(1)
999.1 1,000.6 
Finished goods56.9 58.1 
Product inventory1,357.4 1,396.0 
Capitalized pre-production25.2 26.3 
Total inventory, net$1,382.6 $1,422.3 
_______________________________________
Product inventory, summarized in the table above, is shown net of valuation reserves of $54.9 and $56.8 as of December 31, 2021 and December 31, 2020, respectively.

(1)Work-in-process inventory includes direct labor, direct material, and overhead on contracts for which revenue is recognized at a point in time, as well as sub-assembly parts that have not been issued to production on contracts for which revenue is recognized over time using the input method. For the periods ended December 31, 2021 and December 31, 2020, work-in-process inventory includes $381.2 and $351.2, respectively, of costs incurred in anticipation of specific contracts and no impairments were recorded in the period.

Excess capacity and abnormal production costs are excluded from inventory and recognized as expense in the period incurred. Cost of sales for the twelve months ended December 31, 2021 includes $217.5 of excess capacity production costs related to
temporary B737 MAX, A220, and A320 production schedule changes. Cost of sales also includes costs abnormal costs related to workforce adjustments as a result of COVID-19 production pause, net of U.S. employee retention credit and U.K. government subsidies for the twelve months ended December 31, 2021 of $12.0. Cost of sales for the twelve months ended December 31, 2020 includes $278.9 of excess capacity production costs related to temporary B737 MAX, A220, and A320 production schedule changes, $33.7 related to temporary workforce adjustments as a result of COVID-19 production pause, net of the U.S. employee retention credit and U.K. government subsidies of approximately $21.4.
v3.22.0.1
Property, Plant and Equipment, net (Tables)
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net
Property, plant and equipment, net consists of the following:
December 31, 2021December 31, 2020
Land$30.7 $30.8 
Buildings (including improvements)1,242.0 1,166.7 
Machinery and equipment2,276.5 2,120.5 
Tooling1,051.1 1,036.1 
Capitalized software323.0 282.5 
Construction-in-progress117.1 220.0 
Total5,040.4 4,856.6 
Less: accumulated depreciation(2,654.9)(2,352.8)
Property, plant and equipment, net$2,385.5 $2,503.8 
v3.22.0.1
Other Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
Intangible assets are summarized as follows:
December 31,
2021		December 31,
2020
Intangible assets
Patents$2.0 $2.0 
Favorable leasehold interests2.8 2.8 
Developed technology asset(1)
92.0 94.0 
Customer relationships intangible assets(2)
137.2 124.1 
Total intangible assets234.0 222.9 
Less: Accumulated amortization - patents(2.0)(2.0)
Accumulated amortization - favorable leasehold interest(1.9)(1.8)
 Accumulated amortization - developed technology asset(8.8)(2.6)
 Accumulated amortization - customer relationships(9.0)(1.3)
Intangible assets, net212.3 215.2 

(1) The acquisition of Fiber Materials Inc. on January 10, 2020 resulted in the establishment of a $30.0 intangible asset for developed technology. The Bombardier Acquisition resulted in the establishment of a $64.0 intangible asset for developed technology reported at December 31, 2020, which was subsequently adjusted to $62.0 related to the goodwill adjustment described above.
(2) The Bombardier Acquisition resulted in the establishment of a $124.1 intangible asset for customer relationships, which has been adjusted to $131.0 related to the goodwill adjustment described above. The acquisition of Applied on April 26, 2021 resulted in the establishment of a $6.9 intangible asset for customer relationships which has been adjusted to $6.2 related to the goodwill adjustment described above. See also Note 28, Acquisitions.


The Company’s policy is to use straight-line amortization on the amortizing intangible assets. The amortization for each of the five succeeding years relating to intangible assets currently recorded in the Consolidated Balance sheet and the weighted average amortization is estimated to be the following as of December 31, 2021:
YearFavorable leasehold interestDeveloped TechnologyCustomer RelationshipsTotal
20220.1 6.1 8.1 14.3 
20230.1 6.1 8.1 14.3 
20240.1 6.1 8.1 14.3 
20250.1 6.1 8.1 14.3 
20260.1 6.1 8.1 14.3 
Weighted average amortization period7.513.616.415.3
Other Assets
Other current assets are summarized as follows:
December 31,
2021		December 31,
2020
Prepaid expenses20.7 16.3 
Income tax receivable(1)
14.0 315.3 
Other assets- short term5.0 4.7 
Total other current assets$39.7 $336.3 
Other assets are summarized as follows:
December 31,
2021		December 31,
2020
Deferred financing 
Deferred financing costs0.9 0.9 
Less: Accumulated amortization-deferred financing costs(0.6)(0.5)
Deferred financing costs, net0.3 0.4 
Other 
Supply agreements (2)
9.2 11.4 
Equity in net assets of affiliates0.8 3.1 
Restricted cash - collateral requirements19.5 19.5 
Rotables38.3 35.1 
Other23.5 14.1 
Total$91.6 $83.6 
v3.22.0.1
Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Carrying Amount And Estimated Fair Value Of Long Term Debt
 December 31, 2021 December 31, 2020 
 Carrying
Amount		Fair
Value		 Carrying
Amount		Fair
Value		 
Senior secured term loan B (including current portion)595.2 595.2 
(2)
389.6 395.0 
(2)
Floating rate notes— — 299.7 297.5 
(1)
Senior notes due 2023299.3 303.6 
(1)
298.8 293.8 
(1)
Senior secured first lien notes due 2025495.3 513.3 
(1)
493.9 521.2 
(1)
Senior secured second lien notes due 20251,187.5 1,252.4 
(1)
1,184.2 1,279.1 
(1)
Senior notes due 2026298.4 307.5 
(1)
298.1 313.9 
(1)
Senior notes due 2028695.2 697.4 
(1)
694.6 689.2 
(1)
Total$3,570.9 $3,669.4  $3,658.9 $3,789.7  
_______________________________________

(1)Level 1 Fair Value hierarchy
(2)Level 2 Fair Value hierarchy
See also Note 15, Derivative and Hedging Activities.
v3.22.0.1
Debt (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Long Term Debt And Capital Lease Obligations Current And Non Current Total debt shown on the balance sheet is comprised of the following:
v3.22.0.1
Pension and Other Post-Retirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2021
Defined Contribution Plan Disclosure [Line Items]  
Multiemployer Plan Table
Multi-employer Pension Plan
In connection with the collective bargaining agreement signed with the International Association of Machinists and Aerospace Workers (“IAM”), the Company contributes to a multi-employer defined benefit pension plan (“IAM National Pension Fund”). As of July 1, 2015, the level of contribution, as specified in the bargaining agreement was, in whole dollars, $1.75 per hour of employee service. The IAM bargaining agreement provided for a $0.05 per hour increase, in whole dollars, effective July 1 of each year through 2019. Effective July 1, 2019 the level of employer contribution increased to $1.95 per hour and will remain at $1.95 per hour through contract expiration. The IAM contract expires June 24, 2023.
The collective bargaining agreement with the United Automobile, Aerospace and Agricultural Workers of America (“UAW”) requires the Company to contribute a specified amount per hour of service to the IAM National Pension Fund. The specified amount was $1.70 per hour in 2019. Per the negotiated UAW collective bargaining agreement, the pension contributions, in whole dollars, was $1.70 per hour effective January 1, 2019 and will be $1.75 per hour effective January 1, 2020 through year 2025.
The risk of this multi-employer plan is different from single-employer plans in the following aspects:
1.Assets contributed to the multi-employer plan by one employer may be used to provide benefits to employees of other participating employers.
2.If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.
3.If the Company chooses to stop participating in the multi-employer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability.
The following table summarizes the multi-employer plan to which the Company contributes. Unless otherwise noted, the most recent Pension Protection Act (PPA) zone status available in 2020 and 2021 is for the plan's year-end at December 31, 2020, and December 31, 2021, respectively. The zone status is based on information received from the plan.
  Pension Protection Act Zone Status     Expiration
Date of
Collective-
Bargaining
Agreement
  FIP/RP
Status
Pending/
Implemented		Contributions of the Company 
 EIN/Pension
Plan Number		Surcharge
Imposed
Pension Fund20202021201920202021
IAM National Pension Fund51-60321295RedRedYes$40.7 $30.1 $23.0 YesIAM June 24, 2023
UAW December 7, 2025
Pension Fund
Year Company Contributions to Plan Exceeded More Than 5 Percent of
Total Contributions (as of December 31 of the Plan’s Year-End)
IAM National Pension Fund2019, 2020
Change in projected benefit obligations
Obligations and Funded Status
The following tables reconcile the funded status of both pension and post-retirement medical benefits to the balance on the balance sheets for the fiscal years 2021 and 2020. Benefit obligation balances presented in the tables reflect the projected benefit obligation and accumulated benefit obligation for the Company’s pension plans, and accumulated post-retirement benefit obligations for the Company’s post-retirement medical plan. The Company uses an end of fiscal year measurement date of December 31 for the Company's U.S. pension and post-retirement medical plans. Special termination benefits for the period ending December 31, 2020 were related to a voluntary retirement program offered by the Company in 2020. The projected benefit obligation of the U.S. based defined benefit plans as of December 31, 2021 decreased overall due largely to an increase in the effective discount rate (41 basis points for PVP A). These factors were partially offset by the spinoff of PVP B from PVP A resulting in a settlement loss. The US based Other Post-Retirement benefit plans projected benefit obligation decreased due to an increase in the effective discount rate of 70 basis points. The projected benefit obligation of the U.K. Prestwick Plan decreased, driven by the discount rate increasing by 30 basis points from December 31, 2020 to December 31, 2021. The projected benefit obligation of the U.K. Belfast plans was acquired on October 30, 2020, as part of the Bombardier Acquisition. The funded status for the U.K. Belfast plans improved over the year primarily due to the impact of closing the Shorts Pension to future accrual, the deficit reduction contributions paid by the Company which were agreed as part of the Bombardier Acquisition and out-performance of the plan assets over the projected benefit obligation.
 Pension BenefitsOther Post-Retirement
Benefits
 Periods Ended December 31,Periods Ended December 31,
U.S. Plans2021202020212020
Change in projected benefit obligation:    
Beginning balance$1,099.1 $1,096.6 $49.5 $41.8 
Service cost— — 0.8 0.8 
Employee contributions— — 1.3 1.2 
Interest cost18.7 24.4 0.3 1.0 
Actuarial losses (gains)(38.7)124.8 1.0 (1.8)
Special termination benefits— 31.0 — 12.0 
Plan Curtailment— 33.9 — 2.3 
Plan Settlements(226.7)(175.5)— — 
Benefits paid(38.3)(36.1)(10.4)(7.8)
Projected benefit obligation at the end of the period$814.1 $1,099.1 $42.5 $49.5 
Assumptions used to determine benefit obligation:    
Discount rate2.72 %2.31 %1.96 %1.26 %
Rate of compensation increaseN/AN/AN/AN/A
Medical assumptions:  
Trend assumed for the yearN/AN/A7.00 %5.56 %
Ultimate trend rateN/AN/A4.00 %4.50 %
Year that ultimate trend rate is reachedN/AN/A20472038
Change in fair value of plan assets:  
Beginning balance$1,526.3 $1,519.5 $— $— 
Actual return (loss) on assets66.3 218.4 — — 
Employer contributions to plan(9.0)0.1 9.1 6.6 
Employee contributions to plan— — 1.3 1.2 
Plan Settlements(226.7)(175.5)— — 
Benefits paid(38.3)(36.2)(10.4)(7.8)
Ending balance$1,318.6 $1,526.3 $— $— 
Reconciliation of funded status to net amounts recognized:    
Funded status (deficit)$504.5 $427.3 $(42.5)$(49.5)
Net amounts recognized$504.5 $427.3 $(42.5)$(49.5)
Amounts recognized in the balance sheet:   
Noncurrent assets$505.8 $428.7 — — 
Current liabilities(0.1)(0.1)(9.7)(10.3)
Noncurrent liabilities(1.2)(1.3)(32.8)(39.2)
Net amounts recognized$504.5 $427.3 $(42.5)$(49.5)
Amounts not yet reflected in net periodic benefit cost and included in AOCI:    
Accumulated other comprehensive (loss) income$51.7 $(6.5)$16.2 $19.3 
Cumulative employer contributions in excess of net periodic benefit cost452.8 433.8 (58.7)(68.8)
Net amount recognized in the balance sheet$504.5 $427.3 $(42.5)$(49.5)
Information for pension plans with benefit obligations in excess of plan assets:   
Projected benefit obligation$1.3 $1.4 $42.5 $49.5 
Accumulated benefit obligation1.3 1.4 — — 
The U.S. based defined benefit plans utilize a cash balance based formula for a subset of the plan participants. The weighted-average interest crediting rates used to determine the benefit obligation and net periodic benefit cost for all future years is 5.25%.
 Pension Benefits
 Periods Ended December 31,
U.K. Prestwick Plan20212020
Change in projected benefit obligation:  
Beginning balance$75.9 $66.7 
Service cost1.2 0.9 
Interest cost1.0 1.2 
Actuarial loss (gain) (1.3)12.2 
Benefits paid(1.1)(0.8)
Expense paid(1.2)(0.9)
Plan settlements(2.2)(5.9)
Exchange rate changes(0.7)2.5 
Projected benefit obligation at the end of the period$71.6 $75.9 
Assumptions used to determine benefit obligation:  
Discount rate1.75 %1.45 %
Rate of compensation increase3.50 %3.10 %
Change in fair value of plan assets:
Beginning balance$103.1 $91.6 
Actual return (loss) on assets(0.9)15.1 
Company contributions1.9 1.7 
Plan settlements(2.5)(6.9)
Expenses paid(1.2)(0.9)
Benefits paid(1.1)(0.8)
Exchange rate changes(1.0)3.3 
Ending balance$98.3 $103.1 
Reconciliation of funded status to net amounts recognized:  
Funded status26.7 27.2 
Net amounts recognized$26.7 $27.2 
Amounts recognized in the balance sheet:  
Noncurrent assets$26.7 $27.2 
Noncurrent liabilities— — 
Net amounts recognized$26.7 $27.2 
Amounts not yet reflected in net periodic benefit cost and included in AOCI:  
Accumulated other comprehensive income4.3 5.8 
Prepaid pension cost22.4 21.4 
Net amount recognized in the balance sheet$26.7 $27.2 
Information for pension plans with benefit obligations in excess of plan assets:  
Projected benefit obligation$— $— 
Accumulated benefit obligation— — 
Fair value of assets$— $— 

Pension BenefitsOther
Post-Retirement
Benefits
Periods Ended December 31,Periods Ended December 31,
U.K Belfast Plans2021202020212020
Change in projected benefit obligation:
Beginning balance$2,661.4 $— $0.8 $— 
Net transfer in/(out) (including the effect of any business combination divestitures)— 2,311.8 — 0.7 
Service cost39.3 6.3 0.1 — 
Employee contributions0.9 — — — 
Expenses Paid(1.3)— — — 
Interest cost36.3 6.0 — — 
Actuarial losses (gains)(57.5)183.9 — — 
Plan curtailments(61.0)— — — 
Exchange rate changes(22.2)161.6 — 0.1 
Benefits paid(67.9)(8.2)(0.1)— 
Projected benefit obligation at the end of the period$2,528.0 $2,661.4 $0.8 $0.8 
Assumptions used to determine benefit obligation:
Discount rate1.8 %1.45 %1.8 %1.45 %
Rate of compensation increaseN/A2.90 %N/AN/A
Medical assumptions:
Trend assumed for the yearN/AN/A5.75 %5.50 %
Ultimate trend rateN/AN/A5.75 %5.50 %
Year that ultimate trend rate is reachedN/AN/AN/AN/A
Change in fair value of plan assets:
Beginning balance$2,262.7 $— $— $— 
Net transfer in/(out) (including the effect of any business combination divestitures)— 2,003.7 — — 
Actual return on assets139.7 125.9 — — 
Employer contributions to plan180.9 3.8 0.1 — 
Employee contributions to plan0.9 0.1 — — 
Benefits paid(67.9)(8.2)(0.1)— 
Exchange rate changes(26.9)137.4 — — 
Expenses paid(1.3)— — — 
Ending balance$2,488.1 $2,262.7 $— $— 
Reconciliation of funded status to net amounts recognized:
Funded status (deficit)$(39.9)$(398.8)$(0.8)$(0.8)
Net amounts recognized$(39.9)$(398.8)$(0.8)$(0.8)
Amounts recognized in the balance sheet:
Noncurrent assets0.6 — — — 
Current liabilities— — (0.1)— 
Noncurrent liabilities(40.5)(398.8)(0.7)(0.8)
Net amounts recognized$(39.9)$(398.8)$(0.8)$(0.8)
Amounts not yet reflected in net periodic benefit cost and included in AOCI:
Accumulated other comprehensive (loss) income$21.6 $(404.7)$— $(0.8)
Cumulative employer contributions in excess of net periodic benefit cost(61.5)5.9 (0.8)— 
Net amount recognized in the balance sheet$(39.9)$(398.8)$(0.8)$(0.8)
Information for pension plans with benefit obligations in excess of plan assets:
Projected benefit obligation$2,501.9 $2,661.4 $0.8 $— 
Accumulated benefit obligation2,501.9 2,594.5 — — 
Fair value of assets2,461.2 2,262.7 — — 
Annual Expense
Annual Expense
The components of pension and other post-retirement benefit plans expense for the U.S. plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
 Pension BenefitsOther
Post-Retirement
Benefits
 Periods Ended
December 31,		Periods Ended
December 31,
U.S. Plans202120202019202120202019
Components of net periodic benefit cost (income):      
Service cost$— $— $— $0.8 $0.8 $0.9 
Interest cost18.7 24.4 36.5 0.3 1.0 1.2 
Expected return on plan assets(57.7)(64.2)(66.7)— — — 
Amortization of net (gain) loss— 0.2 0.5 (1.3)(1.7)(2.2)
Amortization of prior service costs— — — (0.8)(0.9)(0.9)
Settlement loss recognized(1)
11.0 9.8 3.4 — — — 
Curtailment loss/(gain) (2)
— 33.9 — — (0.2)— 
Special termination benefits(2)
— 31.0 5.2 — 12.0 3.9 
Net periodic benefit (income) cost(28.0)35.1 (21.1)(1.0)11.0 2.9 
Other changes recognized in OCI:      
Total recognized in other OCI (income) loss$(58.2)$(39.4)$(95.9)$3.2 $1.0 $4.9 
Total recognized in other net periodic benefit and OCI (income) loss$(86.2)$(4.3)$(117.0)$2.2 $12.0 $7.8 
Assumptions used to determine net periodic benefit costs:      
Discount rate2.31 %3.19 %4.21 %1.26 %2.55 %3.74 %
Expected return on plan assets4.00 %4.50 %5.00 %N/AN/AN/A
Salary increasesN/AN/AN/AN/AN/AN/A
Medical Assumptions:      
Trend assumed for the yearN/AN/AN/A5.56 %5.90 %6.24 %
Ultimate trend rateN/AN/AN/A4.50 %4.50 %4.50 %
Year that ultimate trend rate is reachedN/AN/AN/A203820382038

(1) Due to settlement accounting during the fiscal years ending 2021, 2020, and 2019, the Company recognized charges of $11.0, $9.8 and $3.4, respectively, that was recorded to Other income (expense).

(2) Special termination benefits and curtailment loss as of December 31, 2020 and December 31, 2019 is a combination of pension value plan, post-retirement medical plan, offset by a reduction in the Company’s net benefit obligation. The increase is due to voluntary retirement programs in 2020 and 2019.
The Company records the service component of net periodic benefit cost in operating profit and the non-service components of net periodic benefit cost (i.e., interest cost, expected return on plan assets, amortization of prior service cost, special termination benefits, and net actuarial gains or losses) as part of non-operating income.
The components of the pension benefit plan expense for the U.K. plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
 Pension Benefits
 Periods Ended
December 31,
U.K. Prestwick Plan202120202019
Components of net periodic benefit cost (income):   
Service cost$1.2 $0.9 $0.9 
Interest cost1.0 1.2 1.7 
Expected return on plan assets(1.4)(1.7)(2.4)
Settlement gain(0.2)(0.4)(0.2)
Net periodic benefit cost (income)$0.6 $— $— 
Other changes recognized in OCI:   
Total cost (income) recognized in OCI$1.2 $(0.9)$(3.2)
Total recognized in net periodic benefit cost and OCI$1.8 $(0.9)$(3.2)
Assumptions used to determine net periodic benefit costs:   
Discount rate1.45 %2.10 %3.00 %
Expected return on plan assets1.40 %2.00 %3.10 %
Salary increases3.10 %3.15 %3.40 %
The estimated net (gain) loss that will be amortized from other comprehensive income into net periodic benefit cost over the next fiscal year for the U.K. plan is zero.
The components of the pension benefit plan expense for the Belfast plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
Pension BenefitsOther Post-Retirement Benefits
Periods Ended
December 31,		Periods Ended
December 31,
U.K. Belfast Plans202120202019202120202019
Components of net periodic benefit cost (income):
Service cost$39.3 $6.3 $— $0.1 $— $— 
Interest cost36.3 5.9 — — — — 
Curtailment (gain)/loss recognized(1)
(61.0)— — — — — 
Expected return on plan assets(95.2)(14.0)— — — — 
Net periodic benefit cost (income)$(80.6)$(1.8)$— $0.1 $— $— 
Other changes recognized in OCI:
Total (income) recognized in OCI$(98.1)$96.6 $— $— $— $— 
Total recognized in net periodic benefit cost and OCI$(178.7)$94.8 $— $0.1 $— $— 
Assumptions used to determine net periodic benefit costs:
Discount rate1.45 %1.75 %— %1.45 %1.75 %N/A
Expected return on plan assets4.20 %4.20 %— %N/AN/AN/A
Salary increases2.90 %2.75 %— %N/AN/AN/A
Medical Assumptions:
Trend assumed for the yearN/AN/AN/A5.75 %5.50 %N/A
Ultimate trend rateN/AN/AN/A5.75 %5.50 %N/A
Year that ultimate trend rate is reachedN/AN/AN/AN/AN/AN/A
(1) In the fourth quarter of 2021, the Shorts Pension Defined Benefit plan was closed out and a new defined contribution plan was opened for affected employees. This closure resulted in a curtailment gain of $61.0.

Assumptions
The Company sets the discount rate assumption annually for each of its retirement-related benefit plans as of the measurement date, based on a review of projected cash flow and a long-term high-quality corporate bond yield curve. The discount rate determined on each measurement date is used to calculate the benefit obligation as of that date, and is also used to calculate the net periodic benefit (income)/cost for the upcoming plan year. During 2015, the mortality assumption for the U.S. plans was updated to Mercer’s MRP-2007 generational mortality tables for non-annuitants and Mercer’s MILES-2010 generational tables for the Auto, Industrial Goods and Transportation group for annuitants both reflecting Mercer’s MMP-2007 improvement scale. In 2018, the Company incorporated the MMP-2018 improvement scale. MMP-2018 is a Mercer-developed scale that uses the same basic model as the Society of Actuaries MP-2018 scale, but with different parameters and adjustments for actual experience since 2006. In 2019, the Company incorporated the MMP-2019 improvement scale which was utilized in 2020. In 2021, the Company incorporated the MMP-2021 improvement scale. MMP-2021 is a Mercer-developed scale that uses the same basic model as the Society of Actuaries MP-2019 scale, but with different parameters and adjustments for actual experience since 2006. A blue collar adjustment is reflected for the hourly union participants and a white collar adjustment is reflected for all other participants. Actuarial gains and losses are amortized using the corridor method over the average working lifetimes of active participants/membership.

The pension expected return on assets assumption is derived from the long-term expected returns based on the investment allocation by class specified in the Company’s investment policy. The expected return on plan assets determined on each measurement date is used to calculate the net periodic benefit (income)/cost of the upcoming plan year.

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. To determine the health care cost trend rates the Company considers national health trends and adjusts for its specific plan design and locations. The trend and aging assumptions were updated during 2016 to reflect more current trends. These assumptions were reviewed in 2021 based on a review of updated national health trends.
U.S. Plans Investment Objectives
The Company’s investment objective is to achieve long-term growth of capital, with exposure to risk set at an appropriate level. This objective shall be accomplished through the utilization of a diversified asset mix consisting of equities (domestic and international) and taxable fixed income securities. The allowable asset allocation range is:
Equities
20 – 50%
Fixed income
50 – 80%
Real estate
0 – 7%
Asset Category U.S.
The Company’s plans have asset allocations for the U.S., as of December 31, 2021 and December 31, 2020, as follows:
20212020
Asset Category — U.S.  
Cash equivalents6 %— %
Equity securities — U.S. 22 %26 %
Equity securities — International3 %3 %
Debt securities67 %69 %
Real estate2 %2 %
Total100 %100 %
U.K. Plans Investment Objecives
U.K. Prestwick Plan
The Trustee’s investment objective is to ensure that they can meet their obligation to the beneficiaries of the Plan. An additional objective is to achieve a return on the total Plan, which is compatible with the level of risk considered appropriate. The overall benchmark allocation of the Plan’s assets is:
Equity securities
15 – 17%
Debt securities82 - 84%
Property1%
Asset Category U.K.
The Plan has asset allocations as of December 31, 2021 and December 31, 2020, as follows:
20212020
Asset Category — U.K. Prestwick  
Equity securities15 %15 %
Debt securities80 %80 %
Other5 %5 %
Total100 %100 %
Total Benefits Expected To Be Paid Over Next Ten Years
The total benefits expected to be paid over the next ten years from the plans’ assets or the assets of the Company, by country, are as follows:
U.S.Pension PlansOther
Post-Retirement
Benefit Plans
2022$69.1 $9.7 
2023$40.0 $8.7 
2024$40.7 $6.2 
2025$41.4 $4.3 
2026$42.0 $3.3 
2027-2031$214.7 $11.2 
U.K. PrestwickPension Plans
2022$1.1 
2023$1.1 
2024$1.1 
2025$1.2 
2026$1.2 
2027-2031$6.3 
U.K. BelfastPension PlansOther
Post-Retirement
Benefit Plans
2022$69.3 $0.1 
2023$70.6 $0.1 
2024$71.9 $0.1 
2025$73.3 $0.1 
2026$74.7 $0.1 
2027-2031$395.1 $0.5 
Pension Plan Assets Measured at Fair Value on a Recurring Basis
Fair Value Measurements
The pension plan assets are valued at fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the valuation hierarchy.
Temporary Cash Investments — These investments consist of U.S. dollars and foreign currencies held in master trust accounts. Foreign currencies held are reported in terms of U.S. dollars based on currency exchange rates readily available in active markets. These temporary cash investments are classified as level 1 investments.
Collective Investment Trusts — These investments are public investment vehicles valued using market prices and performance of the fund. The trust allocates notional units to the policy holder based on the underlying notional unit buy (offer) price using the middle market price plus transaction costs. These investments are classified within level 2 of the valuation hierarchy. In addition, the collective investment trust includes a real estate fund, which is classified within level 3 of the valuation hierarchy.
Commingled Equity and Bond Funds — These investments are valued at the closing price reported by the Plan Trustee. These investments are not being traded in an active market, but are backed by various investment securities managed by the Bank of New York. Fair value is being calculated using inputs that rely on the Bank of New York’s own assumptions, which are based on underlying investments that are traded on an active market and classified within level 2 of the valuation hierarchy.
As of December 31, 2021 and December 31, 2020, the pension plan assets measured at fair value on a recurring basis were as follows:
  At December 31, 2021 Using
DescriptionDecember 31, 2021 TotalQuoted Prices in
Active Markets
for Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Temporary Cash Investments$80.4 $80.4 $— $— 
Collective Investment Trusts97.6 — 95.7 1.9 
Commingled Equity and Bond Funds3,700.1 — 3,700.1 — 
$3,878.1 $80.4 $3,795.8 $1.9 
  At December 31, 2020 Using
DescriptionDecember 31, 2020 TotalQuoted Prices in
Active Markets
for Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Temporary Cash Investments$6.4 $6.4 $— $— 
Collective Investment Trusts102.4 — 99.0 3.4 
Commingled Equity and Bond Funds3,735.0 — 3,735.0 — 
$3,843.8 $6.4 $3,834.0 $3.4 
The table below sets forth a summary of changes in the fair value of the Plan’s level 3 investment assets and liabilities for the years ended December 31, 2021 and December 31, 2020:
 December 31, 2021
DescriptionBeginning
Fair Value		PurchasesGain (Loss)Sales,
Maturities,
Settlements, Net		Exchange
rate		Ending Fair
Value
Collective Investment Trusts$3.4 $— $0.2 $(1.7)$— $1.9 
$3.4 $— $0.2 $(1.7)$— $1.9 

 December 31, 2020
DescriptionBeginning
Fair Value		PurchasesGain (Loss)Sales,
Maturities,
Settlements, Net		Exchange
rate		Ending Fair
Value
Collective Investment Trusts$3.4 $— $(0.1)$— $0.1 $3.4 
$3.4 $— $(0.1)$— $0.1 $3.4 
Pension and Other Post Retirement Benefits Plans Belfast Investment Objectives
The Trustees’ investment objective is to ensure that they can meet their obligation to the beneficiaries of the Plans. An additional objective is to achieve a return on the total Plan, which is compatible with the level of risk considered appropriate. The overall benchmark allocation of the Plan’s assets is:
Equity securities31%
Fixed Income35%
Indexed-Linked Gilts19%
Real Return Assets13%
Money Market2%
v3.22.0.1
Stock Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
19.   Stock Compensation
Holdings has established the stockholder-approved 2014 Omnibus Incentive Plan, as amended (the “Omnibus Plan”) to grant cash and equity awards to certain individuals. Compensation values are based on the value of Holdings’ Common Stock on the grant date, which is added to equity and charged to period expense. The Company’s Omnibus Plan was amended in October 2019 to allow for participants to make tax elections with respect to their equity awards.
Holdings has recognized a net total of $25.8, $24.2, and $36.1 of stock compensation expense for the twelve months ended December 31, 2021, 2020, and 2019, respectively. Stock compensation expense is charged in its entirety directly to selling, general and administrative expense.
Short-Term Incentive Plan
The Short-Term Incentive Program under the Omnibus Plan enables eligible employees to receive incentive benefits in the form of cash as determined by the Compensation Committee.
Board of Directors Stock Awards
The Company’s Omnibus Plan provides non-employee directors the opportunity to receive grants of restricted shares of Common Stock, or Restricted Stock Units (“RSUs”) or a combination of both Common Stock and RSUs. The Common Stock grants and RSU grants vest one year from the grant date subject to the directors compliance with the one-year service condition; however, the RSU grants are not payable until the director’s separation from service. The Board of Directors is authorized to make discretionary grants of shares or RSUs from time to time. Compensation values are based on the value of Holdings’ Common Stock on the grant date, which is added to equity and charged to period expense or included in inventory and cost of sales.
The Company expensed a net amount of $1.5, $1.4, and $1.4 for the restricted shares of Common Stock and RSUs for the twelve months ended December 31, 2021, 2020, and 2019, respectively. As of December 31, 2021, the Company’s unamortized stock compensation related to these restricted shares of Common Stock and RSUs is $0.5, which will be recognized over a weighted average remaining period of 4 months. The intrinsic value of the unvested restricted shares of Common Stock and RSUs, based on the value of the Company’s stock at December 31, 2021, was $1.5, based on the value of the Company’s Common Stock and the number of unvested shares of restricted Common Stock and RSUs.
 Shares
Value(1)
 Class AClass A
 (Thousands) 
Board of Directors Stock Grants  
Nonvested at December 31, 201822 1.6 
Granted during period17 1.5 
Vested during period(22)(1.7)
Forfeited during period— — 
Nonvested at December 31, 201917 1.4 
Granted during period65 1.3 
Vested during period(17)(1.5)
Forfeited during period— — 
Nonvested at December 31, 202065 1.2 
Granted during period36 $1.6 
Vested during period(65)$(1.2)
Forfeited during period— $— 
Nonvested at December 31, 202136 $1.6 
______________________________________________________________________________________________________________________________
(1)Value represents grant date fair value per share.
 Shares
Value(1)
 Common StockCommon Stock
 (Thousands) 
Long-Term Incentive Plan/Long-Term Incentive Award under Omnibus Plan  
Nonvested at December 31, 20181,391 $86.0 
Granted during period431 40.6 
Vested during period(393)(24.2)
Forfeited during period(125)(8.4)
Nonvested at December 31, 20191,304 94.0 
Granted during period940 39.6 
Vested during period(573)(39.1)
Forfeited during period(192)(14.0)
Nonvested at December 31, 20201,479 80.5 
Granted during period763 36.7 
Vested during period(305)(20.6)
Forfeited during period(535)(27.7)
Nonvested at December 31, 20211,402 $68.9 
________________________________________________________________________________________________________________________________

(1)Value represents grant date fair value.
v3.22.0.1
Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
202120202019
U.S. $(553.3)$(1,046.7)$552.4 
International(1.9)(39.2)110.7 
Total (before equity earnings)$(555.2)$(1,085.9)$663.1 
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
202120202019
Current   
Federal$(11.4)$(301.0)$57.8 
State(0.2)(5.5)0.7 
Foreign0.9 (8.1)(12.8)
Total current$(10.7)$(314.6)$45.7 
Deferred 
Federal$(14.0)$(16.2)$71.8 
State15.9 106.9 (11.4)
Foreign(8.4)3.7 26.7 
Total deferred(6.5)94.4 87.1 
Total income tax provision$(17.2)$(220.2)$132.8 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
202120202019
Tax at U.S. Federal statutory rate$(116.5)21.0 %$(228.1)21.0 %$139.3 21.0 %
State income taxes, net of Federal benefit(24.9)4.5 (28.1)2.6 14.9 2.3 
State income tax credits, net of Federal benefit(7.4)1.3 (17.4)1.6 (22.6)(3.4)
Foreign rate differences(5.2)0.9 (3.3)0.3 (7.1)(1.1)
Research and experimentation(1.6)0.3 (0.1)— 0.7 0.1 
Excess tax benefits0.8 (0.1)0.1 — (2.5)(0.4)
Non-deductible expenses1.9 (0.3)10.5 (1.0)4.0 0.6 
Transition tax— — — — 1.6 0.2 
Re-measurement of Deferred Taxes(58.8)10.6 1.7 (0.2)(2.0)(0.3)
Global Intangible Low-Taxed Income (GILTI) Tax0.9 (0.2)3.9 (0.4)7.1 1.1 
Valuation Allowance204.2 (36.9)150.2 (13.8)— — 
NOL Utilized at 35% vs 21%(5.3)1.0 (104.8)9.7 — — 
Other(5.3)1.0 (4.8)0.5 (0.6)(0.1)
Total income tax provision$(17.2)3.1 %$(220.2)20.3 %$132.8 20.0 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
20212020
Depreciation and amortization$(159.6)$(174.3)
Long-term contracts144.2 165.7 
State income tax credits130.1 122.8 
Net operating loss carryforward321.7 98.6 
Accruals and reserves47.8 50.3 
Employee compensation accruals40.0 36.2 
Pension and other employee benefit plans(78.3)(15.3)
Interest expense limitation27.1 22.7 
Post retirement benefits other than pensions10.2 11.8 
Other30.7 8.0 
Inventory1.0 1.2 
Interest swap contracts0.5 0.3 
Net deferred tax asset before valuation allowance515.4 328.0 
Valuation allowance(536.8)(340.9)
Net deferred tax (liability)(21.4)(12.9)
Schedule of Unrecognized Tax Benefits Roll Forward
202120202019
Beginning balance at January 1$16.5 $5.4 $7.2 
Bombardier Acquisition opening balance sheet— 14.0 — 
Remeasurement for tax rate change2.0 — — 
Gross increases related to current period tax positions0.4 0.4 0.4 
Gross decreases related to prior period tax positions— — (2.2)
Statute of limitations' expiration(0.6)(3.3)— 
Ending balance at December 31$18.3 $16.5 $5.4 
v3.22.0.1
Equity (Tables) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated Other Comprehensive Loss, net of tax, is summarized by component as follows:
December 31, 2021December 31, 2020
Interest swaps$— $(0.9)
Pension(1)
26.6 (112.0)
SERP/ Retiree medical12.1 14.5 
Derivatives - foreign currency hedge(2.0)— 
Foreign currency impact on long term intercompany loan(12.2)(11.8)
Currency translation adjustment(48.2)(43.9)
Total accumulated other comprehensive loss$(23.7)$(154.1)
    
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax $ 2.1 $ (9.5) $ (3.7)
Accumulated Other Comprehensive Income (Loss) $ (23.7) (154.1)  
Stock Repurchased During Period, Value     $ 75.8
Schedule Of Earnings Per Share, Basic And Diluted
Earnings per Share Calculation
Basic net income per share is computed using the weighted-average number of outstanding shares of Common Stock during the measurement period. Diluted net income per share is computed using the weighted-average number of outstanding shares of Common Stock and, when dilutive, potential outstanding shares of Common Stock during the measurement period.
The following table sets forth the computation of basic and diluted earnings per share:
 For the Twelve Months Ended
 December 31, 2021December 31, 2020December 31, 2019
 LossSharesPer
Share
Amount		LossSharesPer
Share
Amount		IncomeSharesPer
Share
Amount
Basic EPS        
(Loss) income available to common shareholders$(540.8)104.2 $(5.19)$(870.3)103.9 $(8.38)$529.7 103.6 $5.11 
Income allocated to participating securities— — — —  0.4 0.1  
Net (loss) income $(540.8)  $(870.3)  $530.1   
Diluted potential common shares   1.0  
Diluted EPS         
Net (loss) income $(540.8)104.2 $(5.19)$(870.3)103.9 $(8.38)$530.1 104.7 $5.06 
Included in the outstanding common shares were 0.7 million, 1.5 million and 1.4 million of issued but unvested shares at December 31, 2021, 2020 and 2019, respectively, which are excluded from the basic EPS calculation.
Common shares of 0.6 million were excluded from diluted EPS as a result of incurring a net loss for the twelve month period ended December 31, 2021, as the effect would have been antidilutive. Additionally, diluted EPS for the twelve month period ended December 31, 2021 excludes 0.3 million shares that may be dilutive common shares in the future, but were not included in the computation of diluted EPS because the effect was either antidilutive or the performance condition was not met.
Common shares of 0.8 million were excluded from diluted EPS as a result of incurring a net loss for the twelve month period ended December 31, 2020, as the effect would have been antidilutive. Additionally, diluted EPS for the twelve month
period ended December 31, 2020 excluded 0.3 million shares that were not included in the computation of diluted EPS because the effect was either antidilutive or the performance condition was not met. 		   
Accumulated Defined Benefit Plans Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated Other Comprehensive Income (Loss) $ 26.6 (112.0)  
Accumulated SERP And Retiree Medical [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated Other Comprehensive Income (Loss) 12.1 14.5  
Foreign Currency Impact On Long Term Intercompany Loan [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated Other Comprehensive Income (Loss) (12.2) (11.8)  
Accumulated Translation Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated Other Comprehensive Income (Loss) (48.2) (43.9)  
Accumulated Interest Rate Swaps      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated Other Comprehensive Income (Loss) $ 0.0 $ (0.9)  
v3.22.0.1
Commitments, Contingencies and Guarantees (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Service Warranty Roll Forward
The following is a roll forward of the service warranty and extraordinary rework balance at December 31, 2021, 2020 and 2019:
202120202019
Balance, January 1$76.9 $64.7 $104.8 
Charges to costs and expenses12.3 3.3 (13.9)
Payouts(17.7)(1.9)(1.7)
Impact of TGI Settlement(1)
— — (25.0)
Bombardier Acquisition(2)
— 10.3 — 
Exchange rate(0.2)0.5 0.5 
Balance, December 31$71.3 $76.9 $64.7 
_______________________________________

(1)Due to a settlement on outstanding warranty issues in the first quarter of 2019, $25.0 of warranty provision was reclassified to accounts payable and was paid in the second quarter of 2019.
(2)Warranty liabilities acquired in the Bombardier acquisition.
v3.22.0.1
Other Income (Expense), Net (Tables)
 12 Months Ended
Dec. 31, 2021
Other Nonoperating Income (Expense) [Abstract]  
Other Income Expense Net
Other income (expense), net is summarized as follows:
 For the Twelve Months Ended
 December 31, 2021December 31, 2020December 31, 2019
Kansas Development Finance Authority bond$2.8 $3.0 $3.7 
Pension income (loss)150.1 (36.8)19.5 
Interest income1.8 10.0 12.9 
Loss on foreign currency forward contract and interest rate swaps(1.0)(10.5)(19.0)
Loss on sale of accounts receivable(6.7)(8.9)(24.7)
Foreign currency losses1.4 (27.0)(12.3)
Litigation settlement— — 13.5 
Other(1.8)(7.6)0.6 
Total Other Income (Expense), net$146.6 $(77.8)$(5.8)
v3.22.0.1
Supplemental Balance Sheet Information (Tables)
 12 Months Ended
Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]  
Accrued Expenses and Other Liabilities
Accrued expenses and other liabilities consist of the following:
December 31, 2021December 31, 2020
Accrued expenses 
Accrued wages and bonuses$49.8 $41.1 
Accrued fringe benefits104.3 103.0 
Accrued payroll taxes24.0 23.7 
Accrued interest34.9 29.1 
Workers' compensation7.6 7.7 
Property and sales tax25.4 47.2 
Warranty/extraordinary rework reserve — current2.9 2.1 
Former executive officer liability(4)
44.8 — 
Other(1)
82.4 111.7 
Total$376.1 $365.6 
Other liabilities 
Repayable investment agreement(2)
$301.9 $307.2 
Warranty/extraordinary rework reserve - non-current68.4 74.8 
Other(3)
53.6 55.0 
Total$423.9 $437.0 

(1)Balance as of December 31, 2021 includes $61.3 of general and production material accruals and $13.9 of B787 program liabilities.

(2)As a result of the acquisition of the acquired Bombardier Business, Spirit assumed financial obligations related to a repayable investment agreement with the Department for Business, Energy and Industrial Strategy of the Government of the United Kingdom. The balance above is the long term portion. Current portion of $41.8 and $17.3 as of December 31, 2021 and December 31, 2020, respectively, is within Other Liabilities – Short Term on the Balance Sheet. See note 28, Acquisitions

(3)Balance as of December 31, 2021 includes $8.2 of deferred grant in Morocco, $9.5 various tax credits, $8.9 of estimated workers compensation liability, $8.5 earn-out provision, $10.0 of environmental related and other provisions, and $6.9 of deferred compensation.

(4)See Note 22, Commitments, Contingencies, Guarantees.
v3.22.0.1
Segment Information (Tables)
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Segment Information
The following table shows segment revenues and operating income for the twelve months ended December 31, 2021, 2020 and 2019:
Twelve Months Ended December 31, 2021Twelve Months Ended December 31, 2020Twelve Months Ended December 31, 2019
Segment Revenues   
Commercial$3,128.1 $2,711.3 $7,169.6 
Defense & Space585.0 491.3 507.5 
Aftermarket239.9 202.2 186.0 
$3,953.0 $3,404.8 $7,863.1 
Segment Operating (loss) income (1)
  
Commercial(2)
$(220.6)$(620.6)$968.4 
Defense & Space(3)
44.3 47.0 73.5 
Aftermarket(4)
50.3 37.0 34.8 
(126.0)(536.6)1,076.7 
Corporate SG&A(279.9)(237.4)(261.4)
Research and development(53.3)(38.8)(54.5)
Total operating (loss) income$(459.2)$(812.8)$760.8 
_______________________________________
(1)Inclusive of forward losses, changes in estimate on loss programs and cumulative catch-up adjustments. These changes in estimates for the periods ended December 31, 2021, 2020, and 2019 are further detailed in Note 5, Changes in Estimates.
(2)The year ended December 31, 2021 includes excess capacity production costs of $206.7 related to the temporary B737 MAX and A220 production schedule changes, abnormal costs of $12.0 for workforce adjustments as a result of COVID-19 production pause, net of U.S. employee retention credit and U.K. government subsidies, $6.8 of restructuring costs, and a $35.9 offset related to partial recognition of the Aviation Manufacturing Jobs Protection Program grant which was awarded in the current year. The year ended December 31, 2020 includes excess capacity production costs of $265.5 related to the temporary B737 MAX and A220 production schedule changes, abnormal costs of $33.7 for workforce adjustments as a result of COVID-19 production pause, net of U.S. employee retention credit and U.K. government subsidies, and $64.0 of restructuring costs.

(3)The year ended December 31, 2021 includes excess capacity production costs of $10.8, $1.1 of restructuring costs, and a $3.0 offset related to partial recognition of the Aviation Manufacturing Jobs Protection Program grant which was awarded in the current year. The year ended December 31, 2020 includes excess capacity production costs of $13.4 related to the temporary B737 production schedule changes, and $3.8 of restructuring costs.
(4)The year ended December 31, 2021 includes $0.3 restructuring costs, and a $2.2 offset to costs related to partial recognition of the Aviation Manufacturing Jobs Protection Program grant which was awarded in the current year The year ended December 31, 2020 includes $5.2 of restructuring costs.
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] The following chart illustrates the split between domestic and foreign revenues:
 Year Ended December 31, 2021Year Ended December 31, 2020Year Ended December 31, 2019
Revenue Source(1)
Net RevenuesPercent of
Total
Net Revenues		Net RevenuesPercent of
Total
Net Revenues		Net RevenuesPercent of
Total
Net Revenues
United States$2,822.2 71 %$2,637.6 77 %$6,566.3 84 %
International 
United Kingdom580.4 15 %433.5 13 %771.9 10 %
Other550.4 14 %333.7 10 %524.9 6 %
Total International1,130.8 29 %767.2 23 %1,296.8 16 %
Total Revenues$3,953.0 100 %$3,404.8 100 %$7,863.1 100 %
_______________________________________

(1)Net Revenues are attributable to countries based on destination where goods are delivered.
As of December 31, 2021, most of the Company’s property, plant and equipment are located within the U.S. Approximately 19% of the Company's property, plant and equipment based on book value are located in the U.K. with approximately another 4% of the Company's total property, plant and equipment located in countries outside the U.S. and the U.K. The following chart illustrates the split between domestic and foreign assets:
 Year Ended December 31, 2021Year Ended December 31, 2020Year Ended December 31, 2019
Asset LocationTotal
PPE		Percent of
PPE		Total
PPE		Percent of
Total
PPE		Total
PPE		Percent of
Total
PPE
United States$1,833.7 77 %$1,931.0 77 %$2,079.4 92 %
International 
United Kingdom451.3 19 %466.2 19 %112.4 5 %
Other100.5 4 %106.6 4 %79.9 3 %
Total International551.8 23 %572.8 23 %192.3 8 %
Total Property, Plant & Equipment$2,385.5 100 %$2,503.8 100 %$2,271.7 100 %
v3.22.0.1
Acquisitions (Tables)
 12 Months Ended
Dec. 31, 2021
Acquisition [Abstract] [Abstract]  
Asco Acquisition [Text Block]
Asco Acquisition

On May 1, 2018, the Company and its wholly-owned subsidiary Spirit AeroSystems Belgium Holdings BVBA (“Spirit Belgium”) entered into a definitive agreement (as amended, the “Asco Purchase Agreement”) with certain private sellers providing for the purchase by Spirit Belgium of all of the issued and outstanding equity of S.R.I.F. N.V., the parent company of Asco Industries N.V. (“Asco”), subject to certain customary closing adjustments, including foreign currency adjustments (the “Asco Acquisition”). On September 25, 2020, the Company, Spirit Belgium and the Sellers entered into an amendment to the Asco Purchase Agreement (the “Termination Agreement”) pursuant to which the parties agreed to terminate the Asco Purchase Agreement, including all schedules and annexes thereto (other than certain confidentiality agreements) (collectively with the Asco Purchase Agreement, the “Transaction Documents”), effective as of September 25, 2020. Under the Termination Agreement, the parties also agreed to release each other from any and all claims, rights of action, howsoever arising, of every kind and nature, in connection with, arising out of, based upon or related to, directly or indirectly, the Transaction Documents, including any breach, non-performance, action or failure to act under the Transaction Documents.

Acquisition-related expenses were $0.1 for the twelve months ended December 31, 2021 and $20.0 for the twelve months ended December 31, 2020, and are included in selling, general and administrative costs on the Consolidated Statement of Operations.
FMI Acquisition [Text Block]
FMI

On January 10, 2020, Spirit completed the acquisition of 100% of the outstanding equity of FMI using cash on hand. The acquisition-date fair value of consideration transferred was $121.4, which included cash payment to the seller, payment of closing indebtedness, and payment of selling expenses.

Acquiring FMI aligns with the Company's strategic growth objectives to diversify its customer base and expand the current defense business. FMI is an industry-leader in the design and manufacture of complex composite solutions that are primarily used in aerospace applications. FMI's main operations focus on multidirectional reinforced composites that enable high-temperature applications such as thermal protection systems, re-entry vehicle nose tips, and rocket motor throats and nozzles.

Acquisition-related expenses were $0.5 for the twelve months ended December 31, 2020, and are included in selling, general and administrative costs on the Consolidated Statement of Operations.

The purchase price has been allocated among assets acquired and liabilities assumed at fair value, with the excess purchase price recorded as goodwill. The Company has recorded purchase accounting entries, which the Company concluded were final as of the quarter ended October 1, 2020:
 At January 10, 2020
Cash and cash equivalents$3.5 
Accounts receivable5.3 
Inventory1.9 
Contract Assets, short-term5.6 
Prepaid and other current assets0.5 
Equipment and leasehold improvements12.3 
Intangible assets30.0 
Goodwill76.0 
Other noncurrent assets0.2 
Total assets acquired$135.3 
  
Accounts payable and accrued liabilities1.8 
Income Tax Payable1.4 
Contract liabilities, short-term2.2 
Accrued payroll and employee benefits0.6 
Other current liabilities0.2 
Deferred income taxes, non-current7.5 
Other noncurrent liabilities0.2 
Total liabilities assumed13.9 
Net assets acquired$121.4 
The intangible assets included above consist of the following: 
 AmountAmortization Period
 (in years)
Developed technology asset$30.0 15
Total intangible assets$30.0 15

FMI has developed proprietary know-how over the past 50 years related to its densification and weaving processes. FMI's densification and weaving processes are used to develop specialized composites which can withstand high temperatures and meet the structural requirements set forth by FMI's customers. FMI has developed proprietary designs for 3D and 4D weaving of uncrimped carbon fibers. The densification process utilizes proprietary formulas of heat, pressure, materials, and time to create high density composite solutions at scale. FMI's developed technology results in high strength to weight composites with unmatched density, stability, and heat resistance, which are essential for the mission critical markets it serves. This developed technology is the primary driver of FMI's longstanding, competitive advantage in the markets.

FMI is typically engaged with government agencies through purchase orders and does not have any life of program commitments from customers. As a result of FMI’s existing developed technology and incumbent position on previous purchase orders, FMI is positioned to capture future government programs. As such, the developed technology and contract assets were subsumed into one consolidated intangible asset (collectively referred to as the developed technology asset).

The developed technology intangible asset is deemed to be the primary revenue-generating identifiable intangible asset acquired in the Transaction. The multi-period excess earnings method was used as the approach for estimating the fair value of the developed technology intangible asset which utilizes significant unobservable inputs, or Level 3 inputs, as defined by the fair value hierarchy. The principle behind this method is that the value of the intangible asset is equal to the present value of the after-tax cash flows attributable to the intangible asset only. The analysis included assumptions for projections of revenues and expenses, contributory asset charges, discount rates, and a tax impacts.
The goodwill amount of $76.0 recognized is attributable primarily to expected revenue synergies generated by the integration of the Company's products and technologies with those of FMI and intangible assets that do not qualify for separate recognition, such as the assembled workforce of FMI. None of the goodwill is expected to be deductible for income tax purposes. The goodwill is allocated $65.4 to the Commercial segment, $5.5 to the Defense & Space segment, and $5.1 to the Aftermarket segment. This allocation was based upon the fair value of the projected earnings as of the acquisition date. See Note 12, Other Assets, Goodwill, and Intangible Assets for more information on goodwill.

The Company’s consolidated income statement from the acquisition date to the period ending December 31, 2020 includes revenue and earnings of FMI of $58.8 and $7.7, respectively. The following summary, prepared on a pro forma basis, presents the unaudited consolidated results of operations for the twelve months ended December 31, 2020 and December 31, 2019 as if the acquisition of FMI had been completed as of the beginning of fiscal 2019, after including any post-acquisition adjustments directly attributable to the acquisition, and after including the impact of adjustments such as amortization of intangible assets, and interest expense on related borrowings and, in each case, the related income tax effects. These amounts have been calculated after substantively applying the Company’s accounting policies. This pro forma presentation does not include any impact of transaction synergies. The pro forma results are not necessarily indicative of the Company's results of operations had the Company owned FMI for the entire periods presented, nor does it purport to represent results for any future periods.
For the Twelve Months Ended
December 31,
2020		December 31,
2019
Revenue - as reported$3,404.8 $7,863.1 
Revenue - pro forma$3,405.6 $7,913.8 
Net (loss) income - as reported$(870.3)$530.1 
Net (loss) income - pro forma$(870.2)$534.9 
Earnings Per Share - Diluted - as reported$(8.38)$5.06 
Earnings Per Share - Diluted - pro forma(8.38)5.11
v3.22.0.1
Nature of Business (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]  
Debt, Long-term and Short-term, Combined Amount $ 3,792.2
v3.22.0.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Policy [Policy Text Block]
Property, Plant and Equipment
Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation is applied using a straight-line method over the useful lives of the respective assets as described in the following table:
 Estimated Useful Life
Land improvements20 years
Buildings45 years
Machinery and equipment3-20 years
Tooling — Airplane program — B787, Rolls-Royce5-20 years
Tooling — Airplane program — all others2-10 years
Capitalized software3-7 years
The Company capitalizes certain costs, such as software coding, installation, and testing, that are incurred to purchase or to create and implement internal-use computer software. The Company’s capitalization policy includes specifications that the software must have a service life greater than one year, is legally and substantially owned by the Company, and has an acquisition cost of greater than $0.1. The Company applies the same criteria for capitalizing implementation costs incurred in a cloud computing arrangement hosted by the vendor.
Where the Company is involved in build-to-suit leasing arrangements, the Company is deemed the owner of the asset for accounting purposes during the construction period of the asset. The Company records the related assets and liabilities for construction costs incurred under these build-to-suit leasing arrangements during the construction period. Upon completion of the asset, the Company considers whether the assets and liabilities qualify for derecognition under the sale-leaseback accounting guidance. See Note 10, Property, Plant and Equipment, net.
    
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]      
Product Warranty And Extraordinary Rework, Beginning Balance $ 76.9 $ 64.7 $ 104.8
Charges to costs and expenses 12.3 3.3 (13.9)
Product Warranty Accrual, Payments 17.7 1.9 1.7
Write-offs, net of recoveries   0.0 (25.0)
Exchange rate (0.2) 0.5 0.5
Product Warranty And Extraordinary Rework, Ending Balance 71.3 76.9 $ 64.7
Affiliates [Line Items]      
Equity in net assets of affiliates 0.8 3.1  
Deferred Tax Assets, Valuation Allowance $ 536.8 $ 340.9  
Land and Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 20 years    
Building [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 45 years    
Maximum [Member] | Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 20 years    
Maximum [Member] | Tooling Airplane Program B787 Rolls Royce [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 20 years    
Maximum [Member] | Tooling Airplane Program All Others [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 10 years    
Maximum [Member] | Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 7 years    
Minimum [Member] | Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Minimum [Member] | Tooling Airplane Program B787 Rolls Royce [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Minimum [Member] | Tooling Airplane Program All Others [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 2 years    
Minimum [Member] | Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Capitalization Policy, Service Life 1 year    
Capitalization Policy, Software, Acquisition Cost $ 0.1    
v3.22.0.1
Summary of Significant Accounting Policies Income Tax (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Valuation Allowance [Line Items]    
Deferred Tax Assets, Valuation Allowance $ 536.8 $ 340.9
v3.22.0.1
Changes in Estimates (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change In Estimate [Line Items]      
Change In Accounting Estimate, aggregate, affecting earnings from continuing operations $ (246.5) $ (400.7) $ (65.5)
Changes in Accounting Estimates - Contract Accounting, aggregate, Affecting earnings from Continuing Operations, per Share diluted $ (2.29) $ (3.07) $ (0.50)
Change in Accounting Estimate - Contract Accounting $ (241.5) $ (370.3) $ (63.5)
Change in Accounting Estimate, Description Changes in Estimates The Company has a periodic forecasting process in which management assesses the progress and performance of the Company’s programs. This process requires management to review each program’s progress by evaluating the program schedule, changes to identified risks and opportunities, changes to estimated revenues and costs for the accounting contracts (and options if applicable), and any outstanding contract matters. Risks and opportunities include but are not limited to management’s judgment about the cost associated with the Company’s ability to achieve the schedule, technical requirements (e.g., a newly-developed product versus a mature product), and any other program requirements. Due to the span of years it may take to completely satisfy the performance obligations for the accounting contracts (and options, if any) and the scope and nature of the work required to be performed on those contracts, the estimation of total revenue and costs is subject to many variables and, accordingly, is subject to change based upon judgment. When adjustments in estimated total consideration or estimated total cost are required, any changes from prior estimates for fully satisfied performance obligations are recognized in the current period as a cumulative catch-up adjustment for the inception-to-date effect of such changes. Cumulative catch-up adjustments are driven by several factors including production efficiencies, assumed rate of production, the rate of overhead absorption, changes to scope of work, and contract modifications. Cumulative catch-up adjustments are primarily related to changes in the estimated margin of contracts with performance obligations that are satisfied over time.Changes in estimates are summarized below:Changes in EstimatesDecember 31, 2021December 31, 2020December 31, 2019(Unfavorable) Favorable Cumulative Catch-up Adjustments by SegmentCommercial(5.7)(28.9)(4.5)Defense & Space0.7 (1.5)2.5 Aftermarket— — — Total (Unfavorable) Favorable Cumulative Catch-up Adjustment$(5.0)$(30.4)$(2.0)(Forward Loss) and Changes in Estimates on Loss Programs by SegmentCommercial(227.3)(366.8)(63.5)Defense & Space(14.2)(3.5)— Aftermarket— — — Total (Forward Loss) and Change in Estimate on Loss Program$(241.5)$(370.3)$(63.5)Total Change in Estimate$(246.5)$(400.7)$(65.5)EPS Impact (diluted per share based on statutory tax rate)$(2.29)$(3.07)$(0.50)2021 Changes in EstimatesDuring the twelve months ended December 31, 2021, the Company recognized net forward loss charges of $241.5 primarily driven by production rate changes on B787 and A350 programs and the corresponding amount of fixed overhead absorption applied to lower deliveries, engineering analysis and estimated costs of rework on the B787 programs, estimated quality improvement costs on the A350 program, and cost performance on the B767 program. Unfavorable cumulative catch-up adjustments of $5.0 were primarily driven by the change on the estimate of production for the B737 program.2020 Changes in EstimatesDuring the twelve months ended December 31, 2020, the Company recognized net forward loss charges of $370.3 primarily driven by production rate changes on B787 and A350 from 10 aircraft per month to 5 aircraft per month and 9 aircraft per month to 4 aircraft per month, respectively. Unfavorable cumulative catch up adjustments of $30.4 were primarily driven by rate reduction across all overtime programs due to the COVID-19 pandemic. 2019 Changes in EstimatesDuring the twelve months ended December 31, 2019, the Company recognized net forward loss charges of $65.5 primarily driven by the production rate change on B787 from 14 aircraft per month to 10 aircraft per month.    
Cumulative catch-up adjustment [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting $ (5.0) (30.4) (2.0)
Commercial [Member] | Cumulative catch-up adjustment [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting (5.7) (28.9) (4.5)
Commercial [Member] | Forward Loss [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting (227.3) (366.8) (63.5)
Defense & Space [Member] | Cumulative catch-up adjustment [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting 0.7 (1.5) 2.5
Defense & Space [Member] | Forward Loss [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting (14.2) (3.5) 0.0
Aftermarket [Member] | Cumulative catch-up adjustment [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting 0.0 0.0 0.0
Aftermarket [Member] | Forward Loss [Member]      
Change In Estimate [Line Items]      
Change in Accounting Estimate - Contract Accounting $ 0.0 $ 0.0 $ 0.0
v3.22.0.1
Accounts Receivable, net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Receivables [Abstract]      
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized $ 2,057.3    
Accounts Receivable, Net      
Trade receivables 412.0 $ 458.9  
Other 58.1 31.1  
Less: allowance for credit losses (8.5) (5.6)  
Accounts receivable, net 461.6 484.4  
Gain (Loss) on Sale of Accounts Receivable $ (6.7) $ (8.9) $ (24.7)
v3.22.0.1
Contract with customer, asset and liability (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]      
Contract with Customer, Asset, before Allowance for Credit Loss $ 443.2 $ 372.8 $ 534.7
change in contract asset 70.4 (161.9)  
Contract with Customer, Liability (387.0) (469.6) (514.6)
change in contract liability 82.6 45.0  
Contract with Customer, Liability, Revenue Recognized 192.4 118.2  
Contracts with Customers, Net Contract Asset (Liability) 56.2 (96.8) $ 20.1
change in net contract asset $ 153.0 $ (116.9)  
v3.22.0.1
Revenue Disaggregation and Outstanding Performance Obligations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues $ 3,953.0 $ 3,404.8 $ 7,863.1
Expected to be satisfied in next fiscal year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 3,472.2    
Expected to be satisfied in fiscal year +2      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 4,293.3    
Expected to be satisfied in fiscal year +3      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 2,934.7    
Expected to be satisfied in fiscal year +4 and thereafter      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 614.4    
Transferred over Time [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 3,040.3 2,188.4  
Transferred at Point in Time [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 912.7 1,216.4  
Location United States [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 2,822.2 2,637.6 6,566.3
Location United Kingdom [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 580.4 433.5 771.9
Other Countries [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 550.4 333.7 524.9
Disaggregation of revenue, total international locations [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 1,130.8 767.2 $ 1,296.8
Boeing - all programs [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 2,206.0 2,043.8  
Airbus [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues 945.6 773.3  
Other Customer [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenues $ 801.4 $ 587.7  
v3.22.0.1
Inventory (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Summary Of Inventories [Abstract]    
Raw materials $ 301.4 $ 337.3
Work-in-process(1) 999.1 1,000.6
Finished goods 56.9 58.1
Product inventory 1,357.4 1,396.0
Capitalized pre-production 25.2 26.3
Total inventory, net 1,382.6 1,422.3
Inventory [Line Items]    
Excess Capacity Costs- B737MAX and A320 Production Schedules 217.5 278.9
Abnormal Costs- COVID19 production suspension $ 12.0 33.7
COVID-19 U.S. employee retention credit and U.K. government subsidies   $ 21.4
v3.22.0.1
Inventory (Details 1) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Inventory By Platform [Abstract]    
Total capitalized pre-production $ 25.2 $ 26.3
Forward loss provision(4) (244.6) (184.6)
Total inventory, net $ 1,382.6 $ 1,422.3
v3.22.0.1
Inventory (Details 2) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Inventories [Line Items]    
Inventory Valuation Reserves $ 54.9 $ 56.8
Costs Incurred in Anticipation of Contracts $ 381.2 $ 351.2
v3.22.0.1
Property, Plant and Equipment, net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]      
Cost of Property Repairs and Maintenance $ 158.8 $ 119.7 $ 142.2
Capitalized Computer Software, Amortization 16.7 16.1 17.7
Property, plant and equipment, net      
Land 30.7 30.8  
Buildings (including improvements) 1,242.0 1,166.7  
Machinery and equipment 2,276.5 2,120.5  
Tooling 1,051.1 1,036.1  
Capitalized software 323.0 282.5  
Construction-in-progress 117.1 220.0  
Property, Plant and Equipment, Gross 5,040.4 4,856.6  
Less: accumulated depreciation (2,654.9) (2,352.8)  
Property, plant and equipment, net $ 2,385.5 $ 2,503.8 $ 2,271.7
v3.22.0.1
Property, Plant and Equipment, net (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property Plant And Equipment Textuals [Abstract]      
Capitalized Interest Related To Construction-In-Progress $ 6.1 $ 5.0 $ 6.5
Repair And Maintenance Costs 158.8 119.7 142.2
Depreciation Expense Related To Capitalized Software $ 16.7 16.1 $ 17.7
Commercial [Member]      
Impaired Long-Lived Assets Held and Used [Line Items]      
Gain (Loss) on Disposition of Assets   22.9  
A350 XWB recurring program [Member]      
Impaired Long-Lived Assets Held and Used [Line Items]      
Gain (Loss) on Disposition of Assets   3.7  
B787      
Impaired Long-Lived Assets Held and Used [Line Items]      
Gain (Loss) on Disposition of Assets   $ 19.2  
v3.22.0.1
Leases (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months $ 12.4    
Lessee, Operating Lease, Liability, Payments, Due Year Two 11.7    
Lessee, Operating Lease, Liability, Payments, Due Year Three 11.2    
Lessee, Operating Lease, Liability, Payments, Due Year Four 10.6    
Lessee, Operating Lease, Liability, Payments, Due Year Five 8.8    
Lessee, Operating Lease, Liability, Payments, Due after Year Five 168.8    
Lessee, Operating Lease, Liability, Payments, Due 223.5    
Lessee Imputed Interest Due- Operating (136.5)    
Operating Lease, Liability 87.0    
Finance Lease, Liability, Payments, Due Next Twelve Months 48.3    
Finance Lease, Liability, Payments, Due Year Two 43.0    
Finance Lease, Liability, Payments, Due Year Three 34.7    
Finance Lease, Liability, Payments, Due Year Four 22.9    
Finance Lease, Liability, Payments, Due Year Five 15.8    
Finance Lease, Liability, Payments, Due after Year Five 19.8    
Finance Lease, Liability, Payment, Due 184.5    
Lessee Imputed Interest Due- Finance (19.4)    
finance lease, Right-of-Use Asset, gross 266.1 $ 214.2  
Operating Lease, Payments 10.9 8.7  
Finance Lease, Interest Payment on Liability 7.0 6.3  
Lease, Cost 47.3 36.8 $ 25.1
Operating Lease, Cost 11.5 9.0 9.0
Finance Lease, Right-of-Use Asset, Amortization 28.8 21.5 13.1
Finance Lease, Interest Expense 7.0 6.3 $ 3.0
Finance Lease, Principal Payments 40.9 30.1  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 20.8 28.5  
Finance Lease, Right-of-Use Asset, Accumulated Amortization Amount (73.1) (45.1)  
Finance Lease, Right-of-Use Asset $ 193.0 $ 169.1  
Operating Lease, Weighted Average Remaining Lease Term 36 years 3 months 18 days 42 years 3 months 18 days  
Finance Lease, Weighted Average Remaining Lease Term 4 years 10 months 24 days 5 years 6 months  
Operating Lease, Weighted Average Discount Rate, Percent 5.60% 5.50%  
Finance Lease, Weighted Average Discount Rate, Percent 4.50% 4.30%  
Finance Lease, Liability $ 165.1    
Lessee, Finance Lease, Lease Not Yet Commenced, Commitment $ 35.1    
v3.22.0.1
Other Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets, Gross (Excluding Goodwill) $ 234.0 $ 222.9    
Intangible Assets, Net (Excluding Goodwill) 212.3 215.2    
Other assets        
Prepaid Expense, Current 20.7 16.3    
Income Taxes Receivable, Current 14.0 315.3    
Other Assets, Miscellaneous, Current 5.0 4.7    
Other Assets, Current 39.7 336.3    
Deferred financing costs 0.9 0.9    
Less: Accumulated amortization-deferred financing costs (0.6) (0.5)    
Deferred financing costs, net 0.3 0.4    
Equity in net assets of affiliates 0.8 3.1    
Equity in net assets of affiliates 9.2 11.4    
Restricted Cash and Investments, Noncurrent 19.5 19.5 $ 16.4 $ 20.2
Rotables 38.3 35.1    
Other 23.5 14.1    
Goodwill 623.7 565.3    
Total 91.6 83.6    
Patents [Member]        
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets, Gross (Excluding Goodwill) 2.0 2.0    
Finite-Lived Intangible Assets, Accumulated Amortization (2.0) (2.0)    
Favorable Leasehold [Member]        
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets, Gross (Excluding Goodwill) 2.8 2.8    
Finite-Lived Intangible Assets, Accumulated Amortization (1.9) (1.8)    
Developed Technology        
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets, Gross (Excluding Goodwill) 92.0 94.0    
Finite-Lived Intangible Assets, Accumulated Amortization (8.8) (2.6)    
Customer Contracts        
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets, Gross (Excluding Goodwill) 137.2 124.1    
Finite-Lived Intangible Assets, Accumulated Amortization $ (9.0) $ (1.3)    
v3.22.0.1
Other Assets (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
2014 $ 14.3  
2015 14.3  
2016 14.3  
2017 14.3  
2018 14.3  
Goodwill [Line Items]    
Goodwill 623.7 $ 565.3
Goodwill, Acquired During Period 18.1  
Goodwill, Other Increase (Decrease) 40.2  
Goodwill, Foreign Currency Translation Gain (Loss) 0.1  
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) 234.0 222.9
Intangible Assets, Net (Excluding Goodwill) 212.3 215.2
Finite-Lived Intangible Asset, Expected Amortization, Year One 14.3  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 14.3  
Finite-Lived Intangible Asset, Expected Amortization, Year Four $ 14.3  
Finite-Lived Intangible Assets, Remaining Amortization Period 15 years 3 months 18 days  
Finite-Lived Intangible Asset, Expected Amortization, Year Three $ 14.3  
Finite-Lived Intangible Asset, Expected Amortization, Year Five 14.3  
Commercial [Member]    
Goodwill [Line Items]    
Goodwill 296.8 67.9
Goodwill, Acquired During Period 0.0  
Goodwill, Other Increase (Decrease) 228.8  
Goodwill, Foreign Currency Translation Gain (Loss) 0.1  
Defense & Space [Member]    
Goodwill [Line Items]    
Goodwill 5.5 5.5
Goodwill, Acquired During Period 0.0  
Goodwill, Other Increase (Decrease) 0.0  
Goodwill, Foreign Currency Translation Gain (Loss) 0.0  
Aftermarket [Member]    
Goodwill [Line Items]    
Goodwill 321.4 5.1
Goodwill, Acquired During Period 18.1  
Goodwill, Other Increase (Decrease) 298.2  
Goodwill, Foreign Currency Translation Gain (Loss) 0.0  
unallocated    
Goodwill [Line Items]    
Goodwill 0.0 486.8
Goodwill, Acquired During Period 0.0  
Goodwill, Other Increase (Decrease) (486.8)  
Goodwill, Foreign Currency Translation Gain (Loss) 0.0  
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) 2.0 2.0
Finite-Lived Intangible Assets, Accumulated Amortization (2.0) (2.0)
Favorable Leasehold [Member]    
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
2014 0.1  
2015 0.1  
2016 0.1  
2017 0.1  
2018 0.1  
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) 2.8 2.8
Finite-Lived Intangible Assets, Accumulated Amortization (1.9) (1.8)
Finite-Lived Intangible Asset, Expected Amortization, Year One 0.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 0.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Four $ 0.1  
Finite-Lived Intangible Assets, Remaining Amortization Period 7 years 6 months  
Finite-Lived Intangible Asset, Expected Amortization, Year Three $ 0.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Five 0.1  
Developed Technology    
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
2014 6.1  
2015 6.1  
2016 6.1  
2017 6.1  
2018 6.1  
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) 92.0 94.0
Finite-Lived Intangible Assets, Accumulated Amortization (8.8) (2.6)
Finite-Lived Intangible Asset, Expected Amortization, Year One 6.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 6.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Four $ 6.1  
Finite-Lived Intangible Assets, Remaining Amortization Period 13 years 7 months 6 days  
Finite-Lived Intangible Asset, Expected Amortization, Year Three $ 6.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Five 6.1  
Customer Contracts    
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
2014 8.1  
2015 8.1  
2016 8.1  
2017 8.1  
2018 8.1  
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) 137.2 124.1
Finite-Lived Intangible Assets, Accumulated Amortization (9.0) $ (1.3)
Finite-Lived Intangible Asset, Expected Amortization, Year One 8.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 8.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Four $ 8.1  
Finite-Lived Intangible Assets, Remaining Amortization Period 16 years 4 months 24 days  
Finite-Lived Intangible Asset, Expected Amortization, Year Three $ 8.1  
Finite-Lived Intangible Asset, Expected Amortization, Year Five $ 8.1  
v3.22.0.1
Advance Payments and Deferred Revenue/Credits (Details)
$ / ship_set in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
$ / ship_set
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Deferred Revenue Arrangement [Line Items]      
Increase (Decrease) in Customer Advances $ 2.7 $ (21.0) $ 120.8
Advance payments and deferred revenue/credits summarized      
Amortization Of Advances Per Ship Set (dollars per ship set) | $ / ship_set 450    
Customer advances- 787 program $ 212.1    
customer advances- 737 program 2019 MOA $ 123.0    
customer advances- 737 program- 2020 MOA   $ 225.0  
v3.22.0.1
Fair Value Measurements (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt $ 3,570.9 $ 3,658.9
Debt Instrument, Fair Value Disclosure 3,669.4 3,789.7
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 3,570.9 3,658.9
Long-term Debt, Fair Value 3,669.4 3,789.7
Senior Unsecured Notes Due 2021 [Member] [Domain]    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 0.0 299.7
Debt Instrument, Fair Value Disclosure 0.0 297.5
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 0.0 299.7
Long-term Debt, Fair Value 0.0 297.5
Senior Unsecured Notes Due 2028 [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 695.2 694.6
Debt Instrument, Fair Value Disclosure 697.4 689.2
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 695.2 694.6
Long-term Debt, Fair Value 697.4 689.2
Senior Secured Notes Due 2026 [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 298.4 298.1
Debt Instrument, Fair Value Disclosure 307.5 313.9
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 298.4 298.1
Long-term Debt, Fair Value 307.5 313.9
Senior Unsecured Notes Due 2023 [Member] [Domain]    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 299.3 298.8
Debt Instrument, Fair Value Disclosure 303.6 293.8
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 299.3 298.8
Long-term Debt, Fair Value 303.6 293.8
Secured Debt Term B [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 595.2 389.6
Debt Instrument, Fair Value Disclosure 595.2 395.0
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 595.2 389.6
Long-term Debt, Fair Value 595.2 395.0
Senior Secured Notes Due 2025    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 495.3 493.9
Debt Instrument, Fair Value Disclosure 513.3 521.2
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 495.3 493.9
Long-term Debt, Fair Value 513.3 521.2
Senior Secured Second Lien Notes Due 2025    
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]    
Long-term Debt 1,187.5 1,184.2
Debt Instrument, Fair Value Disclosure 1,252.4 1,279.1
Carrying amount and estimated fair value of long term debt    
Long-term Debt, Carrying Amount 1,187.5 1,184.2
Long-term Debt, Fair Value $ 1,252.4 $ 1,279.1
v3.22.0.1
Derivative and Hedging Activities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Interest Rate Swaps      
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months $ (2.0)    
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments (1.0) $ (10.5) $ (19.0)
Interest Rate Cash Flow Hedge Liability at Fair Value $ 0.0 1.2  
Maximum Length of Time Hedged in Cash Flow Hedge 9 months    
Derivative, Credit Risk Related Contingent Features, Existence and Nature Generally, the Company has agreements with its counterparties that contain a provision whereby if the Company defaults on its existing credit facilities and payment of the loans extended under such facilities is accelerated, the Company could be declared in default under its agreements, which may result in the early termination of the outstanding derivatives governed by such agreements and the payment of an early termination amount.    
Interest Rate Swap [Member]      
Interest Rate Swaps      
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) $ 0.0 14.3 0.8
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net 0.4 3.6 0.1
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring 0.7 10.4  
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments     16.7
Foreign Exchange Contract [Member]      
Derivative [Line Items]      
Derivative, Notional Amount $ 167.7 0.0  
Interest Rate Swaps      
Objectives for Using Cash Flow Hedging Instruments The Company has entered into currency forward contracts, each designated as a cash flow hedge upon the date of execution, for the purpose of reducing the variability of cash flows and hedging against the foreign currency exposure for forecasted payroll, pension and vendor disbursements that are expected to be made in the British pound sterling. The hedging program implemented is intended to reduce foreign currency exposure, and the associated forward currency contracts hedge forecasted transactions through September 2022.    
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 0.0 0.0  
Foreign Currency Cash Flow Hedge Liability at Fair Value (2.0) 0.0  
Unrealized Gain (Loss) on Cash Flow Hedging Instruments (2.0) 0.0 0.0
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion   $ 0.0 $ 0.0
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion $ (0.2)    
v3.22.0.1
Derivative and Hedging Activities (Details 2)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Foreign currency hedge contracts [Member]  
Effect of derivative instrument on statement of other comprehensive income  
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion) $ 0.2
v3.22.0.1
Derivative and Hedging Activities (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]      
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments $ (1.0) $ (10.5) $ (19.0)
Maximum Length of Time Hedged in Cash Flow Hedge 9 months    
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months $ (2.0)    
Interest Rate Swap [Member]      
Derivative [Line Items]      
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments     16.7
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) $ 0.0 $ 14.3 $ 0.8
v3.22.0.1
Debt (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Capital Lease Obligations, Current $ 42.2 $ 35.3
Capital Lease Obligations, Noncurrent 122.9 121.5
Other Long-term Debt, Current 1.4 1.8
Other Long-term Debt, Noncurrent 54.8 56.1
Long-term Debt and Lease Obligation, Current 49.5 340.7
Long-term Debt and Lease Obligation 3,742.7 3,532.9
Long-Term Debt, Maturity, Year One 6.0  
Long-Term Debt, Maturity, Year Two 306.0  
Long-Term Debt, Maturity, Year Three 6.0  
Long-Term Debt, Maturity, Year Four 2,280.5  
Long-Term Debt, Maturity, Year Five 300.0  
Debt, Long-term and Short-term, Combined Amount 3,792.2  
Senior Unsecured Notes Due 2021 [Member] [Domain]    
Debt Instrument [Line Items]    
Long-term Debt 0.0 299.7
Unsecured Long-term Debt, Noncurrent $ 0.0 0.0
Debt Instrument, Description of Variable Rate Basis three-month LIBOR, as determined in the case of the initial interest period, on May 25, 2018, and thereafter at the beginning of each quarterly period as described herein, plus 0.80 basis points  
Long-term Debt, Gross $ 0.0  
Debt, Long-term and Short-term, Combined Amount 0.0  
Secured Debt Term B [Member]    
Debt Instrument [Line Items]    
Secured Long-term Debt, Noncurrent 589.3 385.7
Long-term Debt 5.9 3.9
Long-term Debt, Gross 598.5  
Debt, Long-term and Short-term, Combined Amount $ 595.2  
Senior Unsecured Notes Due 2023 [Member] [Domain]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.95%  
Long-term Debt $ 0.0 0.0
Unsecured Long-term Debt, Noncurrent 299.3 298.8
Long-term Debt, Gross 300.0  
Debt, Long-term and Short-term, Combined Amount $ 299.3  
Senior Unsecured Notes Due 2028 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 4.60%  
Long-term Debt $ 0.0 0.0
Unsecured Long-term Debt, Noncurrent 695.2 694.6
Long-term Debt, Gross 700.0  
Debt, Long-term and Short-term, Combined Amount 695.2  
Senior Secured Notes Due 2026 [Member]    
Debt Instrument [Line Items]    
Secured Long-term Debt, Noncurrent $ 298.4 298.1
Debt Instrument, Interest Rate, Stated Percentage 3.85%  
Long-term Debt $ 0.0 0.0
Long-term Debt, Gross 300.0  
Debt, Long-term and Short-term, Combined Amount 298.4  
Senior Secured Notes Due 2025    
Debt Instrument [Line Items]    
Secured Long-term Debt, Noncurrent $ 495.3 493.9
Debt Instrument, Interest Rate, Stated Percentage 5.50%  
Long-term Debt $ 0.0 0.0
Long-term Debt, Gross 500.0  
Debt, Long-term and Short-term, Combined Amount 495.3  
Senior Secured Second Lien Notes Due 2025    
Debt Instrument [Line Items]    
Secured Long-term Debt, Noncurrent $ 1,187.5 1,184.2
Debt Instrument, Interest Rate, Stated Percentage 750.00%  
Long-term Debt $ 0.0 $ 0.0
Long-term Debt, Gross 1,200.0  
Debt, Long-term and Short-term, Combined Amount $ 1,187.5  
v3.22.0.1
Debt (Details Textual) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Senior Unsecured Notes Due 2023 [Member] [Domain]    
Debt Instrument [Line Items]    
Fixed interest rate 3.95%  
Senior Unsecured Notes Due 2028 [Member]    
Debt Instrument [Line Items]    
Fixed interest rate 4.60%  
Senior Secured Notes Due 2026 [Member]    
Debt Instrument [Line Items]    
Secured Long-term Debt, Noncurrent $ 298.4 $ 298.1
Fixed interest rate 3.85%  
v3.22.0.1
Pension and Other Post Retirement Benefits (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
uSDollarPerHour
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
IAM Level of Contribution per hour until June 2019 | uSDollarPerHour 1.75    
Amounts recognized in balance sheet      
Noncurrent assets $ 532,500,000 $ 455,900,000  
Noncurrent liabilities (74,800,000) (440,200,000)  
Information for pension plans with benefit obligations in excess of plan assets:      
Multiemployer Plan, Employer Contribution, Cost $ 23,000,000.0 $ 30,100,000 $ 40,700,000
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List] Yes    
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List] Red Red  
Pension and Other Post Retirement Benefit Plans Annual Expense
Annual Expense
The components of pension and other post-retirement benefit plans expense for the U.S. plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
 Pension BenefitsOther
Post-Retirement
Benefits
 Periods Ended
December 31,		Periods Ended
December 31,
U.S. Plans202120202019202120202019
Components of net periodic benefit cost (income):      
Service cost$— $— $— $0.8 $0.8 $0.9 
Interest cost18.7 24.4 36.5 0.3 1.0 1.2 
Expected return on plan assets(57.7)(64.2)(66.7)— — — 
Amortization of net (gain) loss— 0.2 0.5 (1.3)(1.7)(2.2)
Amortization of prior service costs— — — (0.8)(0.9)(0.9)
Settlement loss recognized(1)
11.0 9.8 3.4 — — — 
Curtailment loss/(gain) (2)
— 33.9 — — (0.2)— 
Special termination benefits(2)
— 31.0 5.2 — 12.0 3.9 
Net periodic benefit (income) cost(28.0)35.1 (21.1)(1.0)11.0 2.9 
Other changes recognized in OCI:      
Total recognized in other OCI (income) loss$(58.2)$(39.4)$(95.9)$3.2 $1.0 $4.9 
Total recognized in other net periodic benefit and OCI (income) loss$(86.2)$(4.3)$(117.0)$2.2 $12.0 $7.8 
Assumptions used to determine net periodic benefit costs:      
Discount rate2.31 %3.19 %4.21 %1.26 %2.55 %3.74 %
Expected return on plan assets4.00 %4.50 %5.00 %N/AN/AN/A
Salary increasesN/AN/AN/AN/AN/AN/A
Medical Assumptions:      
Trend assumed for the yearN/AN/AN/A5.56 %5.90 %6.24 %
Ultimate trend rateN/AN/AN/A4.50 %4.50 %4.50 %
Year that ultimate trend rate is reachedN/AN/AN/A203820382038

(1) Due to settlement accounting during the fiscal years ending 2021, 2020, and 2019, the Company recognized charges of $11.0, $9.8 and $3.4, respectively, that was recorded to Other income (expense).

(2) Special termination benefits and curtailment loss as of December 31, 2020 and December 31, 2019 is a combination of pension value plan, post-retirement medical plan, offset by a reduction in the Company’s net benefit obligation. The increase is due to voluntary retirement programs in 2020 and 2019.
The Company records the service component of net periodic benefit cost in operating profit and the non-service components of net periodic benefit cost (i.e., interest cost, expected return on plan assets, amortization of prior service cost, special termination benefits, and net actuarial gains or losses) as part of non-operating income.
The components of the pension benefit plan expense for the U.K. plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
 Pension Benefits
 Periods Ended
December 31,
U.K. Prestwick Plan202120202019
Components of net periodic benefit cost (income):   
Service cost$1.2 $0.9 $0.9 
Interest cost1.0 1.2 1.7 
Expected return on plan assets(1.4)(1.7)(2.4)
Settlement gain(0.2)(0.4)(0.2)
Net periodic benefit cost (income)$0.6 $— $— 
Other changes recognized in OCI:   
Total cost (income) recognized in OCI$1.2 $(0.9)$(3.2)
Total recognized in net periodic benefit cost and OCI$1.8 $(0.9)$(3.2)
Assumptions used to determine net periodic benefit costs:   
Discount rate1.45 %2.10 %3.00 %
Expected return on plan assets1.40 %2.00 %3.10 %
Salary increases3.10 %3.15 %3.40 %
The estimated net (gain) loss that will be amortized from other comprehensive income into net periodic benefit cost over the next fiscal year for the U.K. plan is zero.
The components of the pension benefit plan expense for the Belfast plans and the assumptions used to determine benefit obligations for each of the periods ended December 31, 2021, 2020, and 2019 are as follows:
Pension BenefitsOther Post-Retirement Benefits
Periods Ended
December 31,		Periods Ended
December 31,
U.K. Belfast Plans202120202019202120202019
Components of net periodic benefit cost (income):
Service cost$39.3 $6.3 $— $0.1 $— $— 
Interest cost36.3 5.9 — — — — 
Curtailment (gain)/loss recognized(1)
(61.0)— — — — — 
Expected return on plan assets(95.2)(14.0)— — — — 
Net periodic benefit cost (income)$(80.6)$(1.8)$— $0.1 $— $— 
Other changes recognized in OCI:
Total (income) recognized in OCI$(98.1)$96.6 $— $— $— $— 
Total recognized in net periodic benefit cost and OCI$(178.7)$94.8 $— $0.1 $— $— 
Assumptions used to determine net periodic benefit costs:
Discount rate1.45 %1.75 %— %1.45 %1.75 %N/A
Expected return on plan assets4.20 %4.20 %— %N/AN/AN/A
Salary increases2.90 %2.75 %— %N/AN/AN/A
Medical Assumptions:
Trend assumed for the yearN/AN/AN/A5.75 %5.50 %N/A
Ultimate trend rateN/AN/AN/A5.75 %5.50 %N/A
Year that ultimate trend rate is reachedN/AN/AN/AN/AN/AN/A
(1) In the fourth quarter of 2021, the Shorts Pension Defined Benefit plan was closed out and a new defined contribution plan was opened for affected employees. This closure resulted in a curtailment gain of $61.0.

Assumptions
The Company sets the discount rate assumption annually for each of its retirement-related benefit plans as of the measurement date, based on a review of projected cash flow and a long-term high-quality corporate bond yield curve. The discount rate determined on each measurement date is used to calculate the benefit obligation as of that date, and is also used to calculate the net periodic benefit (income)/cost for the upcoming plan year. During 2015, the mortality assumption for the U.S. plans was updated to Mercer’s MRP-2007 generational mortality tables for non-annuitants and Mercer’s MILES-2010 generational tables for the Auto, Industrial Goods and Transportation group for annuitants both reflecting Mercer’s MMP-2007 improvement scale. In 2018, the Company incorporated the MMP-2018 improvement scale. MMP-2018 is a Mercer-developed scale that uses the same basic model as the Society of Actuaries MP-2018 scale, but with different parameters and adjustments for actual experience since 2006. In 2019, the Company incorporated the MMP-2019 improvement scale which was utilized in 2020. In 2021, the Company incorporated the MMP-2021 improvement scale. MMP-2021 is a Mercer-developed scale that uses the same basic model as the Society of Actuaries MP-2019 scale, but with different parameters and adjustments for actual experience since 2006. A blue collar adjustment is reflected for the hourly union participants and a white collar adjustment is reflected for all other participants. Actuarial gains and losses are amortized using the corridor method over the average working lifetimes of active participants/membership.

The pension expected return on assets assumption is derived from the long-term expected returns based on the investment allocation by class specified in the Company’s investment policy. The expected return on plan assets determined on each measurement date is used to calculate the net periodic benefit (income)/cost of the upcoming plan year.

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. To determine the health care cost trend rates the Company considers national health trends and adjusts for its specific plan design and locations. The trend and aging assumptions were updated during 2016 to reflect more current trends. These assumptions were reviewed in 2021 based on a review of updated national health trends.
    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 4.00%    
U.S. [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Contribution Plan, Cost $ 30,400,000 $ 32,500,000 35,900,000
U.K. [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Contribution Plan, Cost 3,900,000 4,100,000 4,100,000
U.K. - Belfast [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Contribution Plan, Cost $ 300,000 30,000.00  
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 8.00%    
U.K. - Belfast New 2021      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 4.00%    
Defined Contribution Plan, Employer Discretionary Contribution Amount, first 4 years 5.00%    
Defined Contribution Plan, Employer additional contribution percent 4.00%    
UNITED STATES      
Change in fair value of plan assets:      
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant $ 0 0  
Defined Benefit Plan, Plan Assets, Payment for Settlement $ (226,700,000) $ (175,500,000)  
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 100.00% 100.00%  
UNITED STATES | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 67.00% 69.00%  
UNITED STATES | Defined Benefit Plan, Real Estate      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 2.00% 2.00%  
UNITED STATES | Defined Benefit Plan, Equity Securities, US [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 22.00% 26.00%  
UNITED STATES | Defined Benefit Plan, Equity Securities, US [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 3.00% 3.00%  
UNITED STATES | Defined Benefit Plan, Cash and Cash Equivalents      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 6.00%    
UNITED STATES | Minimum [Member] | Defined Benefit Plan, Equity Securities      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 20.00%    
UNITED STATES | Minimum [Member] | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00%    
UNITED STATES | Minimum [Member] | Defined Benefit Plan, Real Estate      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%    
UNITED STATES | Maximum [Member] | Defined Benefit Plan, Equity Securities      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00%    
UNITED STATES | Maximum [Member] | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 80.00%    
UNITED STATES | Maximum [Member] | Defined Benefit Plan, Real Estate      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 7.00%    
Belfast      
Change in fair value of plan assets:      
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant $ 900,000 $ 100,000  
Belfast | Defined Benefit Plan, Equity Securities      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 3100.00%    
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 32.00% 32.00%  
Belfast | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 3500.00%    
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 34.00% 36.00%  
Belfast | Other Debt Obligations      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 1900.00%    
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 18.00% 15.00%  
Belfast | Defined Benefit Plan, Real Assets      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 1300.00%    
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 13.00% 13.00%  
Belfast | Money Market Fund [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 200.00%    
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 3.00% 4.00%  
UNITED KINGDOM      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 100.00% 100.00%  
UNITED KINGDOM | Defined Benefit Plan, Equity Securities      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 15.00% 15.00%  
UNITED KINGDOM | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 80.00% 80.00%  
UNITED KINGDOM | Defined Benefit Plan, Real Estate      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 5.00% 5.00%  
UNITED KINGDOM | Minimum [Member] | Defined Benefit Plan, Equity Securities      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 15.00%    
UNITED KINGDOM | Minimum [Member] | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 83.00%    
UNITED KINGDOM | Minimum [Member] | Defined Benefit Plan, Real Estate      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 1.00%    
UNITED KINGDOM | Maximum [Member] | Defined Benefit Plan, Equity Securities      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 17.00%    
UNITED KINGDOM | Maximum [Member] | Defined Benefit Plan, Debt Security      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 85.00%    
UNITED KINGDOM | Maximum [Member] | Defined Benefit Plan, Real Estate      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 1.00%    
Other Benefits [Member] | UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement $ 0 $ 0 0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 0 0  
Defined Benefit Plan, Amortization of Gain (Loss) (1,300,000) (1,700,000) (2,200,000)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment 0 2,300,000  
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax $ 2,200,000 $ (12,000,000.0) $ (7,800,000)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.26% 2.55% 3.74%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning balance $ 49,500,000 $ 41,800,000  
Service cost 800,000 800,000 $ 900,000
Interest cost 300,000 1,000,000.0 1,200,000
Actuarial loss (gain) (1,000,000.0) 1,800,000  
Special termination benefits(2) 0 12,000,000.0 3,900,000
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment 0 0  
Defined Benefit Plan, Benefit Obligation, Benefits Paid 10,400,000 7,800,000  
Projected benefit obligation at the end of the period 42,500,000 49,500,000 41,800,000
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant $ 1,300,000 $ 1,200,000  
Total recognized in other net periodic benefit and OCI (income) loss      
Discount rate 1.96% 1.26%  
Medical Assumptions:      
Trend assumed for the year 7.00% 5.56%  
Ultimate trend rate 4.00% 4.50%  
Year that ultimate trend rate is reached 2047 2038  
Change in fair value of plan assets:      
Beginning balance $ 0 $ 0  
Company contributions (9,100,000) (6,600,000)  
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant 1,300,000 1,200,000  
Defined Benefit Plan, Plan Assets, Benefits Paid 10,400,000 7,800,000  
Ending balance 0 0 0
Defined Benefit Plan, Plan Assets, Payment for Settlement 0 0  
Reconciliation of funded status to net amounts recognized:      
Funded status (deficit) (42,500,000) (49,500,000)  
Net amounts recognized (42,500,000) (49,500,000)  
Amounts recognized in balance sheet      
Noncurrent assets 0 0  
Current liabilities (9,700,000) (10,300,000)  
Noncurrent liabilities (32,800,000) (39,200,000)  
Net amounts recognized (42,500,000) (49,500,000)  
Amounts not yet reflected in net periodic benefit cost and included in AOCI:      
Accumulated gain (loss) 16,200,000 19,300,000  
Accumulated other comprehensive income (AOCI) 16,200,000 19,300,000  
Cumulative employer contributions in excess of net periodic benefit cost (58,700,000) (68,800,000)  
Net amount recognized in the balance sheet (42,500,000) (49,500,000)  
Information for pension plans with benefit obligations in excess of plan assets:      
Projected benefit obligation 42,500,000 49,500,000  
Accumulated benefit obligation 0 0  
Defined Benefit Plan, Expected Return (Loss) on Plan Assets 0 0 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) (1,000,000.0) 11,000,000.0 2,900,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax 3,200,000 1,000,000.0 4,900,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 (200,000) 0
Other Benefits [Member] | Belfast      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 0 0  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning balance 800,000 0  
Service cost 100,000 0  
Interest cost 0 0  
Actuarial loss (gain) 0 0  
Special termination benefits(2) 0 0  
Defined Benefit Plan, Benefit Obligation, Business Combination 0 700,000  
Exchange rate changes 0 100,000  
Projected benefit obligation at the end of the period 800,000 800,000 0
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant $ 0 $ 0  
Total recognized in other net periodic benefit and OCI (income) loss      
Discount rate 1.80% 1.45%  
Medical Assumptions:      
Trend assumed for the year 5.75% 5.50%  
Ultimate trend rate 5.75% 5.50%  
Change in fair value of plan assets:      
Beginning balance $ 0 $ 0  
Company contributions (100,000) 0  
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant 0 0  
Defined Benefit Plan, Plan Assets, Benefits Paid 100,000 0  
Defined Benefit Plan, Plan Assets, Administration Expense 0 0  
Ending balance 0 0 0
Defined Benefit Plan, Plan Assets, Business Combination 0 0  
Reconciliation of funded status to net amounts recognized:      
Funded status (deficit) (800,000) (800,000)  
Net amounts recognized (800,000) (800,000)  
Amounts recognized in balance sheet      
Current liabilities (100,000)    
Noncurrent liabilities (700,000) (800,000)  
Net amounts recognized (800,000) (800,000)  
Amounts not yet reflected in net periodic benefit cost and included in AOCI:      
Accumulated gain (loss) 0 (800,000)  
Accumulated other comprehensive income (AOCI) 0 (800,000)  
Cumulative employer contributions in excess of net periodic benefit cost (800,000) 0  
Net amount recognized in the balance sheet (800,000) (800,000)  
Information for pension plans with benefit obligations in excess of plan assets:      
Projected benefit obligation 800,000 0  
Accumulated benefit obligation 0 0  
Pension Plan [Member] | UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement (11,000,000.0) (9,800,000) (3,400,000)
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 66,300,000 218,400,000  
Defined Benefit Plan, Amortization of Gain (Loss) 0 200,000 500,000
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment 0 33,900,000  
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax $ (86,200,000) $ 4,300,000 $ 117,000,000.0
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.31% 3.19% 4.21%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning balance $ 1,099,100,000 $ 1,096,600,000  
Service cost 0 0 $ 0
Interest cost 18,700,000 24,400,000 36,500,000
Actuarial loss (gain) 38,700,000 (124,800,000)  
Special termination benefits(2) 0 31,000,000.0 5,200,000
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment (226,700,000) (175,500,000)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid 38,300,000 36,100,000  
Projected benefit obligation at the end of the period 814,100,000 1,099,100,000 1,096,600,000
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant $ 0 $ 0  
Total recognized in other net periodic benefit and OCI (income) loss      
Discount rate 2.72% 2.31%  
Change in fair value of plan assets:      
Beginning balance $ 1,526,300,000 $ 1,519,500,000  
Company contributions (9,000,000.0) (100,000)  
Defined Benefit Plan, Plan Assets, Benefits Paid 38,300,000 36,200,000  
Ending balance 1,318,600,000 1,526,300,000 1,519,500,000
Reconciliation of funded status to net amounts recognized:      
Funded status (deficit) 504,500,000 427,300,000  
Net amounts recognized 504,500,000 427,300,000  
Amounts recognized in balance sheet      
Noncurrent assets 505,800,000 428,700,000  
Current liabilities (100,000) (100,000)  
Noncurrent liabilities (1,200,000) (1,300,000)  
Net amounts recognized 504,500,000 427,300,000  
Amounts not yet reflected in net periodic benefit cost and included in AOCI:      
Accumulated gain (loss) 51,700,000 (6,500,000)  
Accumulated other comprehensive income (AOCI) 51,700,000 (6,500,000)  
Cumulative employer contributions in excess of net periodic benefit cost 452,800,000 433,800,000  
Net amount recognized in the balance sheet 504,500,000 427,300,000  
Information for pension plans with benefit obligations in excess of plan assets:      
Projected benefit obligation 1,300,000 1,400,000  
Accumulated benefit obligation 1,300,000 1,400,000  
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (57,700,000) (64,200,000) (66,700,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ (28,000,000.0) $ 35,100,000 $ (21,100,000)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 4.00% 4.50% 5.00%
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax $ (58,200,000) $ (39,400,000) $ (95,900,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 33,900,000 0
Pension Plan [Member] | Foreign Plan [Member]      
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year 0    
Pension Plan [Member] | Belfast      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 139,700,000 125,900,000  
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax $ (178,700,000) $ (94,800,000) 0
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.45% 1.75%  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning balance $ 2,661,400,000 $ 0  
Service cost 39,300,000 6,300,000 0
Interest cost 36,300,000 6,000,000.0 0
Actuarial loss (gain) 57,500,000 (183,900,000)  
Special termination benefits(2) 61,000,000.0 0  
Defined Benefit Plan, Benefit Obligation, Business Combination 0 2,311,800,000  
Exchange rate changes (22,200,000) 161,600,000  
Projected benefit obligation at the end of the period 2,528,000,000 2,661,400,000 0
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant $ 900,000 $ 0  
Total recognized in other net periodic benefit and OCI (income) loss      
Discount rate 1.80% 1.45%  
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase   2.90%  
Salary increases 2.90% 2.75%  
Change in fair value of plan assets:      
Beginning balance $ 2,262,700,000 $ 0  
Company contributions (180,900,000) (3,800,000)  
Exchange rate changes 26,900,000 (137,400,000)  
Defined Benefit Plan, Plan Assets, Benefits Paid 67,900,000 8,200,000  
Defined Benefit Plan, Plan Assets, Administration Expense (1,300,000) 0  
Ending balance 2,488,100,000 2,262,700,000 0
Defined Benefit Plan, Plan Assets, Business Combination 0 2,003,700,000  
Reconciliation of funded status to net amounts recognized:      
Funded status (deficit) (39,900,000) (398,800,000)  
Net amounts recognized (39,900,000) (398,800,000)  
Amounts recognized in balance sheet      
Noncurrent assets 600,000    
Noncurrent liabilities (40,500,000) (398,800,000)  
Net amounts recognized (39,900,000) (398,800,000)  
Amounts not yet reflected in net periodic benefit cost and included in AOCI:      
Accumulated gain (loss) 21,600,000 (404,700,000) 0
Accumulated other comprehensive income (AOCI) 21,600,000 (404,700,000) 0
Cumulative employer contributions in excess of net periodic benefit cost (61,500,000) 5,900,000  
Net amount recognized in the balance sheet (39,900,000) (398,800,000)  
Information for pension plans with benefit obligations in excess of plan assets:      
Projected benefit obligation 2,501,900,000 2,661,400,000  
Accumulated benefit obligation 2,501,900,000 2,594,500,000  
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Fair value of assets $ 2,461,200,000 $ 2,262,700,000  
Defined Benefit Plan, Expected Return (Loss) on Plan Assets     0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)     0
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 4.20% 4.20%  
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax $ (98,100,000) $ 96,600,000  
Pension Plan [Member] | UNITED KINGDOM      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 200,000 400,000 200,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) (900,000) 15,100,000  
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment (2,200,000) (5,900,000)  
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax $ 1,800,000 $ 900,000 $ 3,200,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.45% 2.10% 3.00%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning balance $ 75,900,000 $ 66,700,000  
Service cost 1,200,000 900,000 $ 900,000
Interest cost 1,000,000.0 1,200,000 1,700,000
Actuarial loss (gain) 1,300,000 (12,200,000)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid 1,100,000 800,000  
Expense paid (1,200,000) (900,000)  
Exchange rate changes (700,000) 2,500,000  
Projected benefit obligation at the end of the period $ 71,600,000 $ 75,900,000 66,700,000
Total recognized in other net periodic benefit and OCI (income) loss      
Discount rate 1.75% 1.45%  
Salary increases 3.50% 3.10%  
Change in fair value of plan assets:      
Beginning balance $ 103,100,000 $ 91,600,000  
Company contributions (1,900,000) (1,700,000)  
Expense paid (1,200,000) (900,000)  
Exchange rate changes (1,000,000.0) 3,300,000  
Defined Benefit Plan, Plan Assets, Benefits Paid 1,100,000 800,000  
Defined Benefit Plan, Plan Assets, Administration Expense (1,200,000) (900,000)  
Ending balance 98,300,000 103,100,000 91,600,000
Defined Benefit Plan, Plan Assets, Payment for Settlement (2,500,000) (6,900,000)  
Reconciliation of funded status to net amounts recognized:      
Funded status (deficit) 26,700,000 27,200,000  
Net amounts recognized 26,700,000 27,200,000  
Amounts recognized in balance sheet      
Noncurrent assets 26,700,000 27,200,000  
Net amounts recognized 26,700,000 27,200,000  
Amounts not yet reflected in net periodic benefit cost and included in AOCI:      
Accumulated gain (loss) 4,300,000 5,800,000  
Accumulated other comprehensive income (AOCI) 4,300,000 5,800,000  
Prepaid pension cost 22,400,000 21,400,000  
Net amount recognized in the balance sheet 26,700,000 27,200,000  
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (1,400,000) (1,700,000) (2,400,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ 600,000 $ 0 $ 0
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 1.40% 2.00% 3.10%
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax $ 1,200,000 $ (900,000) $ (3,200,000)
Annual Expense [Member] | Other Benefits [Member] | UNITED STATES      
Medical Assumptions:      
Trend assumed for the year 5.56% 5.90% 6.24%
Ultimate trend rate 4.50% 4.50% 4.50%
Year that ultimate trend rate is reached 2038 2038 2038
Annual Expense [Member] | Other Benefits [Member] | Belfast      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax $ 100,000    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.45% 1.75%  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Service cost $ 100,000    
Medical Assumptions:      
Trend assumed for the year 5.75% 5.50%  
Ultimate trend rate 5.75% 5.50%  
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ 100,000    
Annual Expense [Member] | Pension Plan [Member] | Belfast      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Service cost 39,300,000 $ 6,300,000  
Interest cost 36,300,000 5,900,000  
Information for pension plans with benefit obligations in excess of plan assets:      
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (95,200,000) (14,000,000.0)  
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) (80,600,000) $ (1,800,000)  
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment $ (61,000,000.0)    
Annual Expense [Member] | Pension Plan [Member] | UNITED KINGDOM      
Total recognized in other net periodic benefit and OCI (income) loss      
Salary increases 3.10% 3.15% 3.40%
v3.22.0.1
Pension and Other Post Retirement Benefits (Details 1)
 12 Months Ended
Dec. 31, 2021
USD ($)
uSDollarPerHour
Dec. 31, 2020
USD ($)
uSDollarPerHour
Dec. 31, 2019
USD ($)
Multiemployer Plans [Line Items]      
IAM Level of Contribution per hour until June 2019 1.75    
IAM Level of Contribution per hour Effective July 2019 1.95    
EIN/Pensions plan number 51-60321295    
FIP RP Status Yes    
Year Company Contributions Exceed 5 Percent 2019, 2020    
Multiple-Employer Plan Accounted for as Multiemployer Plan, Plan Name IAM National Pension Fund    
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List] Red Red  
Multiemployer Plan, Employer Contribution, Cost | $ $ 23,000,000.0 $ 30,100,000 $ 40,700,000
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List] Yes    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date IAM June 24, 2023UAW December 7, 2025    
2019 [Member]      
Multiemployer Plans [Line Items]      
UAW Level of Contribution per hour   1.70  
2020 [Member]      
Multiemployer Plans [Line Items]      
UAW Level of Contribution per hour 1.75    
Other Benefits [Member]      
Multiemployer Plans [Line Items]      
Description of Multiemployer Plan Other Post-Retirement Benefit PlansThe Company also has post-retirement health care coverage for eligible U.S. retirees and qualifying dependents prior to age 65. Eligibility for employer-provided benefits is limited to those employees who were employed at the date of the Boeing Acquisition and retire on or after attainment of age 62 and 10 years of service. Employees who do not satisfy these eligibility requirements can retire with post-retirement medical benefits at age 55 and 10 years of service, but they must pay the full cost of medical benefits provided.On October 30, 2020, as part of the Bombardier Acquisition, the Company acquired a post-retirement medical plan for certain former employees at the Belfast location. Eligibility for this plan is closed and no further participants in the plan are expected.    
v3.22.0.1
Pension and Other Post Retirement Plans (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
UNITED STATES | Other Benefits [Member]      
Components of net periodic benefit cost (income):      
Service cost $ 0.8 $ 0.8 $ 0.9
Interest cost 0.3 1.0 1.2
Expected return on plan assets 0.0 0.0 0.0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 0.8 0.9 0.9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 0.0 0.0 0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0.0 (0.2) 0.0
Special termination benefits(2) 0.0 12.0 3.9
Net periodic benefit cost (income) (1.0) 11.0 2.9
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax 3.2 1.0 4.9
Defined Benefit Plan, Amortization of Gain (Loss) 1.3 1.7 2.2
Other changes recognized in OCI:      
Total recognized in net periodic benefit cost and OCI $ (2.2) $ 12.0 $ 7.8
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.26% 2.55% 3.74%
Medical Assumptions:      
Trend assumed for the year 7.00% 5.56%  
Ultimate trend rate 4.00% 4.50%  
Year that ultimate trend rate is reached 2047 2038  
UNITED STATES | Pension Plan [Member]      
Components of net periodic benefit cost (income):      
Service cost $ 0.0 $ 0.0 $ 0.0
Interest cost 18.7 24.4 36.5
Expected return on plan assets (57.7) (64.2) (66.7)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 0.0 0.0 0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 11.0 9.8 3.4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0.0 33.9 0.0
Special termination benefits(2) 0.0 31.0 5.2
Net periodic benefit cost (income) (28.0) 35.1 (21.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax (58.2) (39.4) (95.9)
Defined Benefit Plan, Amortization of Gain (Loss) 0.0 (0.2) (0.5)
Other changes recognized in OCI:      
Total recognized in net periodic benefit cost and OCI $ 86.2 $ (4.3) $ (117.0)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.31% 3.19% 4.21%
Total recognized in other net periodic benefit and OCI (income) loss      
Expected return on plan assets 4.00% 4.50% 5.00%
Foreign Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year $ 0.0    
UNITED KINGDOM | Pension Plan [Member]      
Components of net periodic benefit cost (income):      
Service cost 1.2 $ 0.9 $ 0.9
Interest cost 1.0 1.2 1.7
Expected return on plan assets (1.4) (1.7) (2.4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement (0.2) (0.4) (0.2)
Net periodic benefit cost (income) 0.6 0.0 0.0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax 1.2 (0.9) (3.2)
Other changes recognized in OCI:      
Total recognized in net periodic benefit cost and OCI $ (1.8) $ (0.9) $ (3.2)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.45% 2.10% 3.00%
Total recognized in other net periodic benefit and OCI (income) loss      
Expected return on plan assets 1.40% 2.00% 3.10%
Salary increases 3.50% 3.10%  
v3.22.0.1
Pension and Other Post Retirement Plans (Details 3) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 100.00% 100.00%  
UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months $ 69.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 40.0    
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 40.7    
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 41.4    
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 42.0    
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 214.7    
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 0.0 $ 0.0 $ 0.0
UNITED STATES | Other Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 9.7    
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 8.7    
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 6.2    
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 4.3    
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 3.3    
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 11.2    
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) $ 0.8 $ 0.9 $ 0.9
UNITED STATES | Defined Benefit Plan, Equity Securities, US [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 22.00% 26.00%  
UNITED STATES | Defined Benefit Plan, Equity Securities, US [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 3.00% 3.00%  
UNITED STATES | Defined Benefit Plan, Debt Security      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 67.00% 69.00%  
UNITED STATES | Defined Benefit Plan, Real Estate      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 2.00% 2.00%  
Belfast | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months $ 69.3    
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 70.6    
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 71.9    
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 73.3    
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 74.7    
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 395.1    
Belfast | Other Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 0.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 0.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 0.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 0.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 0.1    
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter $ 0.5    
Belfast | Defined Benefit Plan, Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 32.00% 32.00%  
Belfast | Defined Benefit Plan, Debt Security      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 34.00% 36.00%  
Belfast | Defined Benefit Plan, Real Assets      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 13.00% 13.00%  
Belfast | Other Debt Obligations      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 18.00% 15.00%  
Belfast | Money Market Fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 3.00% 4.00%  
UNITED KINGDOM      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 100.00% 100.00%  
UNITED KINGDOM | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months $ 1.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 1.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 1.1    
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 1.2    
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 1.2    
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter $ 6.3    
UNITED KINGDOM | Defined Benefit Plan, Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 15.00% 15.00%  
UNITED KINGDOM | Defined Benefit Plan, Debt Security      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 80.00% 80.00%  
UNITED KINGDOM | Defined Benefit Plan, Real Estate      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 5.00% 5.00%  
v3.22.0.1
Pension and Other Post Retirement Plans (Details 4)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year, Description Required U.S. pension contributions under Employee Retirement Income Security Act (ERISA) regulations are expected to be zero in 2022 and discretionary contributions are not expected in 2022. SERP and post-retirement medical plan contributions in 2022 are expected to be $9.8. Expected contributions to the U.K. Prestwick plan for 2022 are zero. Expected contributions to the U.K. (Belfast) plans for 2022 are $19.0.
Pension Plan [Member] | UNITED STATES  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months $ 69.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 40.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 40.7
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 41.4
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 42.0
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 214.7
Pension Plan [Member] | UNITED KINGDOM  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 1.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 1.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 1.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 1.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 1.2
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 6.3
Pension Plan [Member] | Belfast  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 69.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 70.6
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 71.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 73.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 74.7
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 395.1
Other Benefits [Member] | UNITED STATES  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 9.7
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 8.7
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 6.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 4.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 3.3
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 11.2
Other Benefits [Member] | Belfast  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 0.1
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter $ 0.5
v3.22.0.1
Pension and Other Post Retirement Plans (Details 5) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) $ 0.0 $ 0.1
UNITED KINGDOM    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage 100.00% 100.00%
Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount $ 80.4 $ 6.4
Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 97.6 102.4
Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 3,700.1 3,735.0
Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 3,843.8  
Ending Fair Value 3,878.1 3,843.8
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 80.4 6.4
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 0.0 0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 0.0 0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 6.4  
Ending Fair Value 80.4 6.4
Significant Other Observable Inputs (Level 2) [Member] | Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 0.0 0.0
Significant Other Observable Inputs (Level 2) [Member] | Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 95.7 99.0
Significant Other Observable Inputs (Level 2) [Member] | Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 3,700.1 3,735.0
Significant Other Observable Inputs (Level 2) [Member] | Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 3,834.0  
Ending Fair Value 3,795.8 3,834.0
Significant Unobservable Inputs (Level 3) [Member] | Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 0.0 0.0
Significant Unobservable Inputs (Level 3) [Member] | Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 1.9 3.4
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 3.4 3.4
Purchases 0.0 0.0
Gain (loss) 0.2 (0.1)
Ending Fair Value 1.9 3.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) (1.7) 0.0
Significant Unobservable Inputs (Level 3) [Member] | Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 0.0 0.0
Significant Unobservable Inputs (Level 3) [Member] | Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 3.4 3.4
Purchases 0.0 0.0
Gain (loss) 0.2 (0.1)
Ending Fair Value 1.9 3.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) $ (1.7) $ 0.0
v3.22.0.1
Pension and Other Post Retirement Plans (Details 6) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Retirement Benefits [Abstract]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 75.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 4.00%    
Statement Defined Contribution Plans [Line Items]      
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date IAM June 24, 2023UAW December 7, 2025    
Multiple-Employer Plan Accounted for as Multiemployer Plan, Plan Name IAM National Pension Fund    
U.S. [Member]      
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract]      
Defined Contribution Plan, Cost $ 30,400 $ 32,500 $ 35,900
U.K. [Member]      
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract]      
Defined Contribution Plan, Cost $ 3,900 4,100 $ 4,100
U.K. - Belfast [Member]      
Retirement Benefits [Abstract]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 8.00%    
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract]      
Defined Contribution Plan, Cost $ 300 $ 30  
v3.22.0.1
Capital Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2019
Dec. 31, 2020
Class Of Stock [Line Items]      
Total Shares Authorized 210,000,000    
Preferred Stock, Shares Authorized 10,000,000   10,000,000
Preferred Stock, Par Value $ 0.01   $ 0.01
Phantom Stock Value Per Share $ 3.33    
SERP units 16,023 38,754 28,950
Stock Repurchased During Period, Value   $ (75.8)  
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 925.0    
Common Stock, Voting Rights one vote per share    
Class A [Member]      
Class Of Stock [Line Items]      
Common Stock, Shares Authorized 200,000,000   200,000,000
Common Stock, Par Value $ 0.01   $ 0.01
Class B [Member]      
Class Of Stock [Line Items]      
Common Stock, Shares Authorized 0   0
Common Stock, Par Value $ 0   $ 0
v3.22.0.1
Stock Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Company recognized total stock compensation expense, net of forfeitures $ 25.8 $ 24.2 $ 36.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested, beginning balance 1,500,000 1,400,000  
Nonvested, ending balance 700,000 1,500,000 1,400,000
Director Stock Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 1.5 $ 1.4 $ 1.4
Intrinsic value of the unvested $ 1,500,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 4 months    
Number of shares granted 36,000 65,000 17,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 0.5    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested, beginning balance 65,000 17,000 22,000
Vested during period (65,000) (17,000) (22,000)
Forfeited during period 0 0 0
Nonvested, ending balance 36,000 65,000 17,000
Restricted Share Activity [Roll Forward]      
Nonvested, beginning balance, value $ 1.2 $ 1.4 $ 1.6
Granted during period, value 1.6 1.3 1.5
Vested during period, value (1.2) (1.5) (1.7)
Forfeited during period, value 0.0 0.0 0.0
Nonvested, ending balance, value $ 1.6 $ 1.2 $ 1.4
Market Based LTIA [Member] | Class A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted   385,887 127,802
Grant Date Of Fair Value Of Shares Granted   $ 16.1 $ 13.4
Long Term Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Intrinsic value of the unvested $ 54,700,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 8 months 12 days    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 28.9    
Long Term Incentive Plan [Member] | Class A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 24.3 $ 22.8 $ 32.2
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested, beginning balance 1,479,000 1,304,000 1,391,000
Granted during period 763,000 940,000 431,000
Vested during period (305,000) (573,000) (393,000)
Forfeited during period (535,000) (192,000) (125,000)
Nonvested, ending balance 1,402,000 1,479,000 1,304,000
Restricted Share Activity [Roll Forward]      
Nonvested, beginning balance, value $ 80.5 $ 94.0 $ 86.0
Granted during period, value 36.7 39.6 40.6
Vested during period, value (20.6) (39.1) (24.2)
Forfeited during period, value (27.7) (14.0) (8.4)
Nonvested, ending balance, value $ 68.9 $ 80.5 $ 94.0
Service Based LTIA [Member] | Class A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted   515,788 303,638
Grant Date Of Fair Value Of Shares Granted   $ 21.0 $ 27.3
Restricted Stock Units (RSUs) [Member] | LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted 570,914    
Restricted Stock [Member] | LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted 30,024    
Share-based Payment Arrangement | LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Date Of Fair Value Of Shares Granted $ 26.9    
Performance Shares | LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted 162,102    
Grant Date Of Fair Value Of Shares Granted $ 9.8    
v3.22.0.1
Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]        
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired $ 13.6 $ 163.6 $ 0.0  
Valuation Allowances and Reserves, Corporate rate remeasurement 63.0      
Summary Pretax Income [Abstract]        
U.S. (553.3) (1,046.7) 552.4  
International (1.9) (39.2) 110.7  
(Loss) income before income taxes and equity in net (loss) income of affiliates (555.2) (1,085.9) 663.1  
Valuation Allowance, Deferred Tax Asset, Change in Amount 6.8 110.1 (3.2)  
Valuation Allowances and Reserves, Depreciation and Amortization 0.2 0.0 0.2  
Valuation Allowances and Reserves, Other (1.3) 19.4 0.0  
Valuation Allowances and Reserves, Other comprehensive income adjustment (21.8) 16.9 0.0  
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 536.8 340.9 10.2 $ 13.2
Valuation Allowances and Reserves, Net operating losses 135.4 20.7 0.0  
Current        
Federal (11.4) (301.0) 57.8  
State (0.2) (5.5) 0.7  
Foreign 0.9 (8.1) (12.8)  
Total current (10.7) (314.6) 45.7  
Deferred        
Federal (14.0) (16.2) 71.8  
State 15.9 106.9 (11.4)  
Foreign (8.4) 3.7 26.7  
Total Deferred (6.5) 94.4 87.1  
Total income tax provision (17.2) (220.2) 132.8  
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]        
Tax at U.S. Federal statutory rate (116.5) (228.1) 139.3  
State income taxes, net of Federal benefit (24.9) (28.1) 14.9  
State income tax credits, net of Federal benefit (7.4) (17.4) (22.6)  
Foreign rate differences (5.2) (3.3) (7.1)  
Research and experimentation (1.6) (0.1) 0.7  
Valuation Allowance - U.S. Deferred Tax Asset $ 204.2 $ 150.2    
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 1.00% 9.70%    
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount $ (5.3) $ (104.8)    
Other (5.3) (4.8) (0.6)  
Total income tax provision $ (17.2) $ (220.2) $ 132.8  
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Tax at U.S. Federal statutory rate 21.00% 21.00% 21.00%  
State income taxes, net of Federal benefit 4.50% 2.60% 2.30%  
State income tax credits, net of Federal benefit 1.30% 1.60% (3.40%)  
Foreign rate differences 0.90% 0.30% (1.10%)  
Research and experimentation (0.30%) 0.00% (0.10%)  
Valuation Allowance - U.S. Deferred Tax Asset (36.90%) (13.80%)    
Other 1.00% 0.50% (0.10%)  
Effective Income Tax Rate Reconciliation, Percent 3.10% 20.30% 20.00%  
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount $ (58.8) $ 1.7 $ (2.0)  
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent 10.60% (0.20%) (0.30%)  
Effective Tax Reconciliation- GILTI $ 0.9 $ 3.9 $ 7.1  
Effective Income Tax Reconciliation, GILTI Tax, Percent (0.20%) (0.40%) 1.10%  
Effective Income Tax Rate Reconciliation, Excess Tax Benefit $ 0.8 $ 0.1 $ (2.5)  
EffectiveTaxRateRecon, ExcessTaxBenefit, Percentage (0.10%) 0.00% (0.40%)  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount $ 1.9 $ 10.5 $ 4.0  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent (0.30%) (1.00%) 0.60%  
Effective Income Tax Rate Reconciliation, Transition Tax, percent 0.00% 0.00% 0.20%  
Effective Income Tax Rate Reconciliation, Transition Tax $ 0.0 $ 0.0 $ 1.6  
Deferred Tax Assets, Tax Deferred Expense [Abstract]        
Depreciation and amortization 144.2 165.7    
Net operating loss carryforward 40.0 36.2    
Deferred Tax Liabilities, Other (78.3) (15.3)    
Accruals and reserves (159.6) (174.3)    
Employee compensation accruals 1.0 1.2    
Pension and other employee benefit plans 321.7 98.6    
Deferred Tax Asset, Interest Carryforward 27.1 22.7    
Deferred Tax Assets, State Taxes 130.1 122.8    
Interest expense limitation 47.8 50.3    
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other 10.2 11.8    
Deferred Tax Assets, Tax Deferred Expense, Other 30.7 8.0    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax 0.5 0.3    
Net deferred tax asset before valuation allowance 515.4 328.0    
Deferred Tax Liabilities, Net (21.4) (12.9)    
Components of Deferred Tax Assets and Liabilities [Abstract]        
Current deferred tax liabilities (21.4) (12.9)    
Non-current deferred tax assets 0.4 0.1    
Non-current deferred tax liabilities (21.8) (13.0)    
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]        
Beginning Balance 16.5 5.4 7.2  
Gross increases related to current period tax positions 0.4 0.4 0.4  
Gross decreases related to prior period tax positions 0.0 0.0 (2.2)  
Statute of limitations' expiration (0.6) (3.3) 0.0  
Ending Balance 18.3 16.5 5.4  
Unrecognized Tax Benefits, Increase Resulting from Acquisition 0.0 14.0    
Unrecognized Tax Benefits, Increase Resulting from remeasurement for tax rate change 2.0      
Tax Credit Carryforward [Line Items]        
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 17.1      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Unrecognized Tax Benefits 18.3 $ 16.5 $ 5.4 $ 7.2
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 17.1      
v3.22.0.1
Income Taxes (Details Textuals) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 17.1    
Effective Income Tax Rate Reconciliation, Percent 3.10% 20.30% 20.00%
Deferred Tax Liabilities, Net $ 21.4 $ 12.9  
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 17.1    
v3.22.0.1
Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Equity [Abstract]        
Accumulated Other Comprehensive Income (Loss) $ (23.7) $ (23.7) $ (154.1)  
Class of Stock [Line Items]        
Employee Stock Purchase Plan, Number of Allocated Shares 1,000,000 1,000,000    
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]        
Preferred Stock, Shares Authorized 10,000,000 10,000,000 10,000,000  
Equity, Class of Treasury Stock [Line Items]        
Common Stock, Dividends, Per Share, Declared $ 0.01 $ 0.04 $ 0.04 $ 0.48
Issued But Unvested Shares (in shares) 700,000 700,000 1,500,000 1,400,000
Noncontrolling interest $ 0.5 $ 0.5 $ 0.5  
Stock Repurchased During Period, Value       $ 75.8
Payments of Dividends   $ 4.3 $ 15.4 50.4
Basic EPS        
(Loss) income available to common shareholders       $ 529.7
(Loss) income available to common shareholders (in shares)   104,200,000 103,900,000 103,600,000
Earnings Per Share, Basic   $ (5.19) $ (8.38) $ 5.11
Income allocated to participating securities   $ 0.0 $ 0.0 $ 0.4
Income allocated to participating securities, shares   0 0 100,000
Net (loss) income   $ (540.8) $ (870.3) $ 530.1
Diluted potential common shares (in shares)   1,000,000.0
Diluted EPS        
Net income   $ (540.8) $ (870.3) $ 530.1
Shares   104,200,000 103,900,000 104,700,000
(Loss) earnings per share, diluted (in dollars per share)   $ (5.19) $ (8.38) $ 5.06
Common Class A [Member]        
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]        
Common Stock, Shares Authorized 200,000,000 200,000,000 200,000,000  
Class B [Member]        
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]        
Common Stock, Shares Authorized 0 0 0  
v3.22.0.1
Commitments, Contingencies and Guarantees (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Contingencies [Line Items]        
Valuation allowance $ (536.8) $ (340.9)    
Service warranty roll forward        
Charges to costs and expenses 12.3 3.3 $ (13.9)  
Product Warranty Accrual, Payments (17.7) (1.9) (1.7)  
Write-offs, net of recoveries   0.0 (25.0)  
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition 0.0 10.3    
Exchange rate (0.2) 0.5 0.5  
Product Warranty And Extraordinary Rework, Ending Balance 71.3 76.9 64.7  
Commitments Contingencies And Guarantees Textuals [Abstract]        
Capital Commitments 137.5 103.8    
Outstanding Amount Of Guarantees 15.9 19.6    
Restricted Cash and Investments, Noncurrent 19.5 19.5 $ 16.4 $ 20.2
Product Liability Accrual, Component Amount 2.3 8.1    
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate 3.4 12.1    
Industrial Revenue Bond [Member]        
Commitments Contingencies And Guarantees Textuals [Abstract]        
Tax Exempt Bonds $ 393.2 $ 380.2    
v3.22.0.1
Other Income (Expense), Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other Nonoperating Income (Expense) [Abstract]      
Kansas Development Finance Authority bond $ 2.8 $ 3.0 $ 3.7
Pension Income (Expense) without Service Cost 150.1 (36.8) 19.5
Interest Income, Other 1.8 10.0 12.9
Other Income (1.8) (7.6) 0.6
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments (1.0) (10.5) (19.0)
Gain (Loss) on Sale of Accounts Receivable (6.7) (8.9) (24.7)
Foreign currency losses 1.4 (27.0) (12.3)
Gain (Loss) Related to Litigation Settlement 0.0 0.0 13.5
Total Other Income (Expense), net $ 146.6 $ (77.8) $ (5.8)
v3.22.0.1
Significant Concentrations of Risk (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Boeing [Member] | Revenue [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 56.00% 60.00% 79.00%
Boeing [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 24.00% 16.00%  
Airbus [Member] | Revenue [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 24.00% 23.00% 16.00%
Airbus [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 27.00% 37.00%  
v3.22.0.1
Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Accrued Expenses other [Line Items]    
Other Accrued Liabilities, Current $ 82.4 $ 111.7
Accrued Liabilities, Current [Abstract]    
Accrued wages and bonuses 49.8 41.1
Accrued fringe benefits 104.3 103.0
Accrued Payroll Taxes, Current 24.0 23.7
Accrued interest 34.9 29.1
Workers' compensation 7.6 7.7
Property and sales tax 25.4 47.2
Warranty/extraordinary rework reserve — current 2.9 2.1
Other(1) 82.4 111.7
Total 376.1 365.6
Repayable Investment Agreement 301.9 307.2
Other Liabilities, Noncurrent [Abstract]    
Warranty/extraordinary rework reserve - non-current 68.4 74.8
Other(3) 53.6 55.0
Total 423.9 $ 437.0
Estimated Litigation Liability $ 44.8  
v3.22.0.1
Segment Information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
customer
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Segment Reporting [Abstract]      
Number Of Largest Customers | customer 2    
Segment Revenues      
Revenues $ 3,953.0 $ 3,404.8 $ 7,863.1
Segment Operating Income      
Business Segment Operating Income (126.0) (536.6) 1,076.7
Research and development (53.3) (38.8) (54.5)
Operating (loss) income (459.2) (812.8) 760.8
Textuals [Abstract]      
Excess Capacity Costs- B737MAX and A320 Production Schedules 217.5 278.9  
Abnormal Costs- COVID19 production suspension 12.0 33.7  
Restructuring Charges 8.2 73.0 0.0
Selling, General and Administrative Expense (279.9) (237.4) (261.4)
Commercial [Member]      
Segment Revenues      
Revenues 3,128.1 2,711.3 7,169.6
Segment Operating Income      
Business Segment Operating Income (220.6) (620.6) 968.4
Textuals [Abstract]      
Excess Capacity Costs- B737MAX and A320 Production Schedules 206.7 265.5  
Abnormal Costs- COVID19 production suspension 12.0 33.7  
Restructuring Charges 6.8 64.0  
Gain (Loss) on Disposition of Assets   (22.9)  
Aviation Manufacturing Jobs Protection Program grant $ 35.9    
Segment Reporting, Disclosure of Major Customers Approximately 60%, 64%, and 81% of Commercial segment net revenues came from the Company's contracts with Boeing for the twelve months ended December 31, 2021, 2020, and 2019, respectively. Approximately 30%, 28%, and 17% of Commercial segment net revenues came from the Company's contracts with Airbus for the twelve months ended December 31, 2021, 2020, and 2019, respectively.    
Defense & Space [Member]      
Segment Revenues      
Revenues $ 585.0 491.3 507.5
Segment Operating Income      
Business Segment Operating Income 44.3 47.0 73.5
Textuals [Abstract]      
Excess Capacity Costs- B737MAX and A320 Production Schedules 10.8 13.4  
Restructuring Charges 1.1 3.8  
Aviation Manufacturing Jobs Protection Program grant $ 3.0    
Segment Reporting, Disclosure of Major Customers Approximately 36%, 28%, and 53% of Defense & Space segment net revenues came from the Company's contracts with an individual customer for the twelve months ended December 31, 2021, 2020, and 2019, respectively. In addition, a customer accounted for approximately 39%, 44%, and 39% of Defense & Space segment net revenues for the twelve months ended December 31, 2021, 2020, and 2019, respectively.    
Aftermarket [Member]      
Segment Revenues      
Revenues $ 239.9 202.2 186.0
Segment Operating Income      
Business Segment Operating Income 50.3 37.0 $ 34.8
Textuals [Abstract]      
Restructuring Charges 0.3 $ 5.2  
Aviation Manufacturing Jobs Protection Program grant $ 2.2    
Segment Reporting, Disclosure of Major Customers Approximately 44%, 80%, and 85% of Aftermarket segment net revenues came from the Company's contracts with a single customer for the twelve months ended December 31, 2021, 2020, and 2019, respectively.    
v3.22.0.1
Segment Information (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net revenues $ 3,953.0 $ 3,404.8 $ 7,863.1
Total Percentage Revenues 100.00% 100.00% 100.00%
Total Percentage Long Lived Assets 100.00% 100.00% 100.00%
Property, plant and equipment, net $ 2,385.5 $ 2,503.8 $ 2,271.7
United States [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percent of Total Net Revenues, United States 71.00% 77.00% 84.00%
Long-Lived Assets $ 1,833.7 $ 1,931.0 $ 1,931.0
United States 77.00% 77.00% 77.00%
United Kingdom [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percent of Total Net Revenues, International 15.00% 13.00% 10.00%
Long-Lived Assets $ 451.3 $ 466.2 $ 466.2
Disclosure on Geographic Areas, Long Lived Assets from External Customers Attributed to Foreign Countries 19.00% 19.00% 19.00%
Other [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net revenues $ 550.4 $ 333.7 $ 524.9
Percent of Total Net Revenues, International 14.00% 10.00% 6.00%
Long-Lived Assets $ 100.5 $ 106.6 $ 106.6
Disclosure on Geographic Areas, Long Lived Assets from External Customers Attributed to Foreign Countries 4.00% 4.00% 4.00%
Total International [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percent of Total Net Revenues, International 29.00% 23.00% 16.00%
Long-Lived Assets $ 551.8 $ 572.8 $ 192.3
Disclosure on Geographic Areas, Long Lived Assets from External Customers Attributed to Foreign Countries 23.00% 23.00% 8.00%
v3.22.0.1
Restructuring and Related Activities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges $ 8.2 $ 73.0 $ 0.0
Commercial [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges 6.8 64.0  
Defense & Space [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges 1.1 3.8  
Aftermarket [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges $ 0.3 5.2  
Employee Severance [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges   51.4  
Other Restructuring [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges   $ 21.6  
v3.22.0.1
Acquisitions (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition, Contingent Consideration [Line Items]      
Goodwill $ 623.7 $ 565.3  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 15 years    
Revenues $ 3,953.0 3,404.8 $ 7,863.1
Net income $ (540.8) $ (870.3) $ 530.1
Earnings Per Share, Diluted $ (5.19) $ (8.38) $ 5.06
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 24.8    
Provision for Loss on Contracts 244.6 $ 184.6  
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles 4.9    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities 38.5    
Business Combination Provisional Information Initial Accounting Incomplete Adjustment Other non-current liabilities 4.3    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets 2.3    
Goodwill, Other Increase (Decrease) $ 40.2    
FMI Acquisition [Text Block]
FMI

On January 10, 2020, Spirit completed the acquisition of 100% of the outstanding equity of FMI using cash on hand. The acquisition-date fair value of consideration transferred was $121.4, which included cash payment to the seller, payment of closing indebtedness, and payment of selling expenses.

Acquiring FMI aligns with the Company's strategic growth objectives to diversify its customer base and expand the current defense business. FMI is an industry-leader in the design and manufacture of complex composite solutions that are primarily used in aerospace applications. FMI's main operations focus on multidirectional reinforced composites that enable high-temperature applications such as thermal protection systems, re-entry vehicle nose tips, and rocket motor throats and nozzles.

Acquisition-related expenses were $0.5 for the twelve months ended December 31, 2020, and are included in selling, general and administrative costs on the Consolidated Statement of Operations.

The purchase price has been allocated among assets acquired and liabilities assumed at fair value, with the excess purchase price recorded as goodwill. The Company has recorded purchase accounting entries, which the Company concluded were final as of the quarter ended October 1, 2020:
 At January 10, 2020
Cash and cash equivalents$3.5 
Accounts receivable5.3 
Inventory1.9 
Contract Assets, short-term5.6 
Prepaid and other current assets0.5 
Equipment and leasehold improvements12.3 
Intangible assets30.0 
Goodwill76.0 
Other noncurrent assets0.2 
Total assets acquired$135.3 
  
Accounts payable and accrued liabilities1.8 
Income Tax Payable1.4 
Contract liabilities, short-term2.2 
Accrued payroll and employee benefits0.6 
Other current liabilities0.2 
Deferred income taxes, non-current7.5 
Other noncurrent liabilities0.2 
Total liabilities assumed13.9 
Net assets acquired$121.4 
The intangible assets included above consist of the following: 
 AmountAmortization Period
 (in years)
Developed technology asset$30.0 15
Total intangible assets$30.0 15

FMI has developed proprietary know-how over the past 50 years related to its densification and weaving processes. FMI's densification and weaving processes are used to develop specialized composites which can withstand high temperatures and meet the structural requirements set forth by FMI's customers. FMI has developed proprietary designs for 3D and 4D weaving of uncrimped carbon fibers. The densification process utilizes proprietary formulas of heat, pressure, materials, and time to create high density composite solutions at scale. FMI's developed technology results in high strength to weight composites with unmatched density, stability, and heat resistance, which are essential for the mission critical markets it serves. This developed technology is the primary driver of FMI's longstanding, competitive advantage in the markets.

FMI is typically engaged with government agencies through purchase orders and does not have any life of program commitments from customers. As a result of FMI’s existing developed technology and incumbent position on previous purchase orders, FMI is positioned to capture future government programs. As such, the developed technology and contract assets were subsumed into one consolidated intangible asset (collectively referred to as the developed technology asset).

The developed technology intangible asset is deemed to be the primary revenue-generating identifiable intangible asset acquired in the Transaction. The multi-period excess earnings method was used as the approach for estimating the fair value of the developed technology intangible asset which utilizes significant unobservable inputs, or Level 3 inputs, as defined by the fair value hierarchy. The principle behind this method is that the value of the intangible asset is equal to the present value of the after-tax cash flows attributable to the intangible asset only. The analysis included assumptions for projections of revenues and expenses, contributory asset charges, discount rates, and a tax impacts.
The goodwill amount of $76.0 recognized is attributable primarily to expected revenue synergies generated by the integration of the Company's products and technologies with those of FMI and intangible assets that do not qualify for separate recognition, such as the assembled workforce of FMI. None of the goodwill is expected to be deductible for income tax purposes. The goodwill is allocated $65.4 to the Commercial segment, $5.5 to the Defense & Space segment, and $5.1 to the Aftermarket segment. This allocation was based upon the fair value of the projected earnings as of the acquisition date. See Note 12, Other Assets, Goodwill, and Intangible Assets for more information on goodwill.

The Company’s consolidated income statement from the acquisition date to the period ending December 31, 2020 includes revenue and earnings of FMI of $58.8 and $7.7, respectively. The following summary, prepared on a pro forma basis, presents the unaudited consolidated results of operations for the twelve months ended December 31, 2020 and December 31, 2019 as if the acquisition of FMI had been completed as of the beginning of fiscal 2019, after including any post-acquisition adjustments directly attributable to the acquisition, and after including the impact of adjustments such as amortization of intangible assets, and interest expense on related borrowings and, in each case, the related income tax effects. These amounts have been calculated after substantively applying the Company’s accounting policies. This pro forma presentation does not include any impact of transaction synergies. The pro forma results are not necessarily indicative of the Company's results of operations had the Company owned FMI for the entire periods presented, nor does it purport to represent results for any future periods.
For the Twelve Months Ended
December 31,
2020		December 31,
2019
Revenue - as reported$3,404.8 $7,863.1 
Revenue - pro forma$3,405.6 $7,913.8 
Net (loss) income - as reported$(870.3)$530.1 
Net (loss) income - pro forma$(870.2)$534.9 
Earnings Per Share - Diluted - as reported$(8.38)$5.06 
Earnings Per Share - Diluted - pro forma(8.38)5.11
    
Commercial [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Goodwill $ 296.8 67.9  
Revenues 3,128.1 2,711.3 $ 7,169.6
Goodwill, Other Increase (Decrease) 228.8    
Defense & Space [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Goodwill 5.5 5.5  
Revenues 585.0 491.3 507.5
Goodwill, Other Increase (Decrease) 0.0    
Aftermarket [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Goodwill 321.4 5.1  
Revenues 239.9 202.2 186.0
Goodwill, Other Increase (Decrease) 298.2    
Asco [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Business Acquisition, Transaction Costs 0.1 20.0  
FMI [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Business Acquisition, Transaction Costs $ 0.5    
Business Acquisition, Effective Date of Acquisition Jan. 10, 2020    
Business Acquisition, Percentage of Voting Interests Acquired 10000.00%    
Business Acquisition, Name of Acquired Entity FMI using cash on hand    
Business Combination, Consideration Transferred $ 121.4    
Business Acquisition, Description of Acquired Entity FMI is an industry-leader in the design and manufacture of complex composite solutions that are primarily used in aerospace applications. FMI's main operations focus on multidirectional reinforced composites that enable high-temperature applications such as thermal protection systems, re-entry vehicle nose tips, and rocket motor throats and nozzles.    
Business Combination, Reason for Business Combination Acquiring FMI aligns with the Company's strategic growth objectives to diversify its customer base and expand the current defense business.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents $ 3.5    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables 5.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory 1.9    
business combination, recognized Identifiable Assets Acquired and Liabilities Assumed, Contract Assets 5.6    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets 0.5    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 12.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 30.0    
Goodwill 76.0    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 0.2    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets 135.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable 1.8    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Tax Payable 1.4    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contract Liabilities 2.2    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Payroll and Employee Benefits 0.6    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other 0.2    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities 7.5    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other 0.2    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities 13.9    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 121.4    
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   58.8  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   7.7  
Business Acquisition, Pro Forma Revenue   3,405.6 7,913.8
Business Acquisition, Pro Forma Net Income (Loss)   $ (870.2) $ 534.9
Business Acquisition, Pro Forma Earnings Per Share, Diluted   $ (8.38) $ 5.11
FMI [Member] | Defense & Space [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Goodwill 65.4    
Bombardier Acquisition [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Business Acquisition, Transaction Costs $ 3.3 $ 11.0  
Business Acquisition, Effective Date of Acquisition Oct. 30, 2020    
Business Combination, Consideration Transferred $ 895.0    
Business Acquisition, Description of Acquired Entity The Bombardier Acquired Businesses are global leaders in aerostructures and fabrication, delivering composite and metallic wing components, nacelles, fuselages and tail assemblies, along with high-value mechanical assemblies made out of aluminum, titanium and steel.    
Business Combination, Reason for Business Combination The acquisition is in line with the Company’s growth strategy of increasing Airbus content, developing low-cost country footprint, and growing the Company’s aftermarket business.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents $ 4.4    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables 91.9    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory 251.6    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets 11.4    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 373.6    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets, Right of Use 27.7    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 193.0    
Goodwill 527.0 486.8  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 11.7    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets 1,492.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable 90.4    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, forward loss provisions, short term 33.8    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other 31.5    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt 286.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other 317.7    
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation 27.5    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Retirement benefits 316.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities 1,217.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 275.0    
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual 93.4    
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual (26.5)    
Business Acquisition, Pro Forma Revenue   3,983.6 $ 8,804.2
Business Acquisition, Pro Forma Net Income (Loss)   $ (883.2) $ 596.3
Business Acquisition, Pro Forma Earnings Per Share, Diluted   $ (8.50) $ 5.70
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued payroll and employee benefits 113.8    
Business Combination, Consideration Transferred, Liabilities Incurred 316.0    
Business Combination, Consideration Transferred, Other 304.0    
Payments to Acquire Businesses, Gross 275.0    
Bombardier Acquisition [Member] | Technology-Based Intangible Assets      
Business Acquisition, Contingent Consideration [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 62.0    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 15 years    
Bombardier Acquisition [Member] | Customer relationships [Member]      
Business Acquisition, Contingent Consideration [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 131.0    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 18 years    
Applied Aerodynamics Acquisition      
Business Acquisition, Contingent Consideration [Line Items]      
Business Acquisition, Transaction Costs $ 0.6    
Business Combination, Consideration Transferred 29.6    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 3.0    
Goodwill 18.1    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other 2.3    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 6.2    
v3.22.0.1
Label Element Value
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents $ 794,100,000