Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Dec. 31, 2022	Feb. 22, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-31225
Entity Registrant Name	ENPRO INDUSTRIES, INC.
Entity Incorporation, State or Country Code	NC
Entity Tax Identification Number	01-0573945
Entity Address, Street Address	5605 Carnegie Boulevard
Entity Address, Suite	Suite 500
Entity Address, City	Charlotte
Entity Address, State	NC
Entity Address, Postal Zip Code	28209
City Area Code	704
Local Phone Number	731-1500
Title of each class	Common stock, $0.01 par value
Trading Symbol(s)	NPO
Name of each exchange on which registered	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,692,838,234
Entity Common Stock, Shares Outstanding		21,032,069
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for the 2023 annual meeting of shareholders are incorporated by reference into Part III.
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0001164863

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Firm ID	238
Auditor Location	Charlotte, North Carolina

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales	$ 1,099.2	$ 840.4	$ 800.0
Cost of sales	675.9	512.3	514.5
Gross profit	423.3	328.1	285.5
Operating expenses:
Selling, general and administrative	282.8	260.3	230.2
Goodwill impairment	65.2	0.0	0.0
Other	3.1	2.4	26.2
Total operating expenses	351.1	262.7	256.4
Operating income	72.2	65.4	29.1
Interest expense	(35.6)	(16.2)	(16.5)
Interest income	1.7	2.5	1.6
Other income (expense)	(10.0)	14.3	(37.7)
Income (loss) from continuing operations before income taxes	28.3	66.0	(23.5)
Income tax benefit (expense)	(24.4)	(8.7)	2.5
Income (loss) from continuing operations	3.9	57.3	(21.0)
Income from discontinued operations, including gain on sale, net of taxes	198.4	121.0	199.0
Net income	202.3	178.3	178.0
Less: net income (loss) attributable to redeemable non-controlling interests	(2.8)	0.4	0.4
Net income attributable to EnPro Industries, Inc.	205.1	177.9	177.6
Income (loss) attributable to EnPro Industries, Inc. common shareholders:
Income (loss) from continuing operations, net of tax	6.7	56.9	(21.4)
Income from discontinued operations, net of taxes	198.4	121.0	199.0
Net income attributable to EnPro Industries, Inc.	$ 205.1	$ 177.9	$ 177.6
Basic earnings (loss) per share attributable to EnPro Industries, Inc.:
Continuing operations (in dollars per share)	$ 0.32	$ 2.76	$ (1.05)
Discontinued operations (in dollars per share)	9.54	5.88	9.69
Net income per share (in dollars per share)	9.86	8.64	8.64
Diluted earnings (loss) per share attributable to EnPro Industries, Inc.:
Continuing operations (in dollars per share)	0.32	2.74	(1.05)
Discontinued operations (in dollars per share)	9.51	5.83	9.69
Net income per share (in dollars per share)	$ 9.83	$ 8.57	$ 8.64

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income attributable to EnPro Industries, Inc.	$ 205.1	$ 177.9	$ 177.6
Other comprehensive income:
Foreign currency translation adjustments	(34.1)	19.8	24.9
Pension and postretirement benefits adjustment (excluding amortization)	(17.0)	4.8	7.8
Pension settlements and curtailments	(1.0)	0.0	(0.8)
Amortization of pension and postretirement benefits included in net income	0.8	0.9	5.5
Other comprehensive income (loss), before tax	(51.3)	25.5	37.4
Income tax expense related to items of other comprehensive income	0.0	(5.6)	(2.9)
Other comprehensive income (loss), net of tax	(51.3)	19.9	34.5
Less: other comprehensive income (loss) attributable to non-controlling interests	(3.4)	0.4	3.0
Other comprehensive income (loss), net of tax attributable to EnPro Industries, Inc	(47.9)	19.5	31.5
Comprehensive income attributable to EnPro Industries, Inc.	$ 157.2	$ 197.4	$ 209.1

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$ 202.3	$ 178.3	$ 178.0
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Income from discontinued operations, net of taxes	(198.4)	(121.0)	(199.0)
Taxes related to sale of discontinued operations	(25.8)	0.0	(38.7)
Depreciation	25.5	18.2	19.2
Amortization	77.6	45.6	37.4
Goodwill impairment	65.2	0.0	0.0
Loss (gain) on sale of businesses	0.6	(17.6)	2.6
Asset impairments	1.3	0.1	26.5
Deferred income taxes	(14.0)	(5.5)	(9.0)
Stock-based compensation	6.5	5.0	5.4
Other non-cash adjustments	4.9	1.7	3.9
Change in assets and liabilities, net of effects of acquisitions and divestitures of businesses:
Accounts receivable, net	(0.1)	(16.9)	14.8
Inventories	(18.0)	(5.4)	12.6
Accounts payable	1.5	9.9	(0.4)
Income taxes, net	(14.6)	17.7	(16.7)
Other current assets and liabilities	(22.5)	13.6	(14.1)
Other non-current assets and liabilities	14.1	0.4	19.6
Net cash provided by operating activities of continuing operations	106.1	124.1	42.1
INVESTING ACTIVITIES OF CONTINUING OPERATIONS
Purchases of property, plant and equipment	(29.4)	(14.9)	(13.4)
Proceeds from sale of businesses	301.9	224.3	475.1
Payments for acquisitions, net of cash acquired	(31.2)	(856.8)	(238.3)
Receipt from settlement of derivative contract	27.4	0.0	0.0
Other	(0.1)	0.0	(2.0)
Net cash provided by (used in) investing activities of continuing operations	268.6	(647.4)	221.4
FINANCING ACTIVITIES OF CONTINUING OPERATIONS
Proceeds from debt	61.0	715.0	29.9
Repayments of debt, including premiums to par value	(398.0)	(79.0)	(168.2)
Issuance of common stock	0.0	10.0	0.0
Dividends paid	(23.4)	(22.4)	(21.7)
Other	(7.6)	(5.4)	(7.3)
Net cash provided by (used in) financing activities of continuing operations	(368.0)	618.2	(167.3)
CASH FLOWS OF DISCONTINUED OPERATIONS
Operating cash flows	21.3	17.9	8.5
Investing cash flows	(5.1)	(3.8)	(4.5)
Net cash provided by discontinued operations	16.2	14.1	4.0
Effect of exchange rate changes on cash and cash equivalents	(26.6)	(0.4)	8.1
Net increase (decrease) in cash and cash equivalents	(3.7)	108.6	108.3
Cash and cash equivalents at beginning of year	338.1	229.5	121.2
Cash and cash equivalents at end of year	334.4	338.1	229.5
Cash paid during the year for:
Interest	31.5	14.9	16.1
Income taxes, net of refunds received	80.8	6.4	67.2
Non-cash investing and financing activities
Non-cash acquisitions of property, plant and equipment	$ 0.7	$ 0.7	$ 1.6

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 334.4	$ 338.1
Accounts receivable, less allowance for doubtful accounts of $2.9 in 2022 and of $2.1 in 2021	137.1	145.0
Inventories	151.9	135.9
Prepaid expenses and other current assets	44.9	35.8
Current assets of discontinued operations	15.9	149.9
Total current assets	684.2	804.7
Property, plant and equipment, net	185.2	184.3
Goodwill	863.8	948.0
Other intangible assets, net	799.8	894.2
Other assets	114.8	143.4
Total assets	2,647.8	2,974.6
Current liabilities
Current maturities of long-term debt	15.6	12.7
Short-term debt	0.0	149.3
Accounts payable	73.4	72.0
Accrued expenses	120.2	116.5
Current liabilities of discontinued operations	2.3	35.8
Total current liabilities	211.5	386.3
Long-term debt	775.1	963.9
Deferred taxes and non-current income taxes payable	136.5	166.1
Other liabilities	111.7	137.9
Total liabilities	1,234.8	1,654.2
Commitments and contingent liabilities
Redeemable non-controlling interest	17.9	50.1
Shareholders’ equity
Common stock – $.01 par value; 100,000,000 shares authorized; issued 20,996,739 shares at December 31, 2022 and 20,915,793 shares at December 31, 2021	0.2	0.2
Additional paid-in capital	299.2	303.6
Retained earnings	1,130.2	953.1
Accumulated other comprehensive income (loss)	(33.3)	14.6
Common stock held in treasury, at cost – 179,345 shares at December 31, 2022 and 180,848 shares at December 31, 2021	(1.2)	(1.2)
Total shareholders’ equity	1,395.1	1,270.3
Total liabilities and equity	$ 2,647.8	$ 2,974.6

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts and notes receivable, allowance for doubtful accounts	$ 2.9	$ 2.1
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	20,996,739	20,915,793
Treasury stock, common, shares (in shares)	179,345	180,848

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Adjustment	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2019	$ 896.6	$ (0.1)	$ 0.2	$ 292.1	$ 641.9	$ (0.1)	$ (36.4)	$ (1.2)
Balance (in shares) at Dec. 31, 2019			20.6
Increase (Decrease) in Stockholders' Equity
Net income (loss)	177.6				177.6
Other comprehensive income (loss)	31.5						31.5
Dividends	(21.7)				(21.7)
Share repurchases	$ (5.3)			(5.3)
Shares repurchases (in shares)	(0.1)		(0.1)
Incentive plan activity	$ 4.8			4.8
Other	(2.0)			(2.0)
Ending balance at Dec. 31, 2020	1,081.4		$ 0.2	289.6	797.7		(4.9)	(1.2)
Balance (in shares) at Dec. 31, 2020			20.5
Beginning balance at Dec. 31, 2019	28.0
Redeemable non-controlling interest
Temporary Equity, Increase from Business Combination	16.9
Net income	0.4
Other comprehensive income (loss)	3.0
Other	0.1
Ending balance at Dec. 31, 2020	48.4
Increase (Decrease) in Stockholders' Equity
Net income (loss)	177.9				177.9
Other comprehensive income (loss)	19.5						19.5
Dividends	(22.6)				(22.6)
Incentive plan activity (in shares)			0.1
Incentive plan activity	5.0			5.0
Other (in shares)			0.1
Other	9.1			9.0	0.1
Ending balance at Dec. 31, 2021	1,270.3		$ 0.2	303.6	953.1		14.6	(1.2)
Balance (in shares) at Dec. 31, 2021			20.7
Redeemable non-controlling interest
Net income	0.4
Other comprehensive income (loss)	0.4
Other	0.9
Ending balance at Dec. 31, 2021	50.1
Increase (Decrease) in Stockholders' Equity
Net income (loss)	205.1				205.1
Other comprehensive income (loss)	(47.9)						(47.9)
Dividends	(23.4)				(23.4)
Incentive plan activity (in shares)			0.1
Other	(9.0)			(4.4)	(4.6)
Ending balance at Dec. 31, 2022	1,395.1		$ 0.2	$ 299.2	$ 1,130.2		$ (33.3)	$ (1.2)
Balance (in shares) at Dec. 31, 2022			20.8
Redeemable non-controlling interest
Net income	(2.8)
Other comprehensive income (loss)	(3.4)
Acquisition of LeanTeq minority ownership	(35.0)
Other	9.0
Ending balance at Dec. 31, 2022	$ 17.9

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends per share (in dollars per share)	$ 1.12	$ 1.08	$ 1.04

Overview, Basis of Presentation, and Significant Accounting Policies

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Overview, Basis of Presentation, and Significant Accounting Policies


1.			Overview, Basis of Presentation, and Significant Accounting Policies

Overview

EnPro Industries, Inc. (“we,” “us,” “our,” “EnPro,” or the “Company”) is a leading-edge industrial technology company focused on critical applications across a diverse group of growing end markets such as semiconductor, photonics, industrial process, aerospace, food, biopharma and life sciences. EnPro is a leader in applied engineering and designs, develops, manufactures, and markets proprietary, value-added products and solutions that safeguard a variety of critical environments.

Over the past several years, we have executed several strategic initiatives to focus the portfolio of businesses where we offer proprietary, industrial technology-related products and solutions with high barriers to entry, compelling margins, strong cash flow, and perpetual recurring/aftermarket revenue in markets with favorable secular tailwinds.

Basis of Presentation

The Consolidated Financial Statements reflect the accounts of the Company and our majority-owned and controlled subsidiaries. All intercompany accounts and transactions between our consolidated operations have been eliminated.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the amounts of assets and liabilities and the disclosures regarding contingent assets and liabilities at period end and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Summary of Significant Accounting Policies

Inventory – Effective July 1, 2022, we changed our method of determining cost for certain inventories from a LIFO basis to a FIFO basis for all of our inventories that were still accounted for under LIFO. We concluded the FIFO basis of accounting is the preferable method for determining inventory cost for our businesses because it improves comparability with our peers, harmonizes our accounting for inventory across all locations, more accurately reflects the current value and physical flow of inventory, and aligns operationally with how management views the performance of the business. Inventories are recorded at the lower of cost or net realizable value.

We retrospectively applied this change in accounting principle to all prior periods, including discontinued operations; and recorded a cumulative effect adjustment to increase the January 1, 2020 inventory balance by $2.7 million, an increase to the January 1, 2020 current assets of discontinued operations balance by $10.0 million, and an increase to retained earnings by $9.7 million (net of tax). The Consolidated Statement of Operations for the quarter and year ended December 31, 2021 and 2020, Consolidated Statement of Cash flows for the year ended December 31, 2021 and 2020, and the Consolidated Balance Sheet at December 31, 2021 have been retrospectively adjusted to reflect the change in accounting principle. Had we continued to apply LIFO, cost of sales for the year ended December 31, 2022, would have been $4.0 million higher, inventory would have been $7.8 million lower. At December 31, 2022, income from discontinued operations, including gain on sale, net of tax, would have been approximately $0.1 million lower for the fiscal year ended December 31, 2022, and current assets of discontinued operations at December 31, 2022 would have been unchanged.

The impact of our change in accounting method for valuing certain inventories on our previously issued financial statements is presented in the following tables:


Consolidated Statement of Operations
(in millions)	Year Ended December 31, 2021
	As Reported 1		Effect of Change		As Adjusted
Cost of sales	$	511.8	$	0.5	$	512.3
Gross profit	328.6		(0.5)		328.1
Operating income	65.9		(0.5)		65.4
Income from continuing operations before income taxes	66.5		(0.5)		66.0
Income tax expense	(8.8)		0.1		(8.7)
Income from continuing operations	57.7		(0.4)		57.3
Income from discontinued operations, including gain on sale, net of tax	121.4		(0.4)		121.0
Net income	179.1		(0.8)		178.3
Net income attributable to EnPro Industries, Inc.	$	178.7	$	(0.8)	$	177.9


Consolidated Statement of Operations
(in millions)	Year Ended December 31, 2020
	As Reported 1		Effect of Change		As Adjusted
Cost of sales	$	514.0	$	0.5	$	514.5
Gross profit	286.0		(0.5)		285.5
Operating income	29.6		(0.5)		29.1
Income from continuing operations before income taxes	(23.0)		(0.5)		(23.5)
Income tax benefit	2.4		0.1		2.5
Income from continuing operations	(20.6)		(0.4)		(21.0)
Income from discontinued operations, net of tax	206.3		(7.3)		199.0
Net income	185.7		(7.7)		178.0
Net income attributable to EnPro Industries, Inc.	$	185.3	$	(7.7)	$	177.6


Consolidated Balance Sheet
(in millions)	December 31, 2021
	As Reported 1		Effect of Change		As Adjusted
Inventories	$	132.1	$	3.8	$	135.9
Current assets of discontinued operations	148.9		1.0		149.9
Total current assets	799.9		4.8		804.7
Total assets	$	2,969.8	$	4.8	$	2,974.6

Current liabilities of discontinued operations	$	35.5	$	0.3	$	35.8
Total current liabilities	386.0		0.3		386.3
Deferred taxes and non-current income taxes payable	165.2		0.9		166.1
Total liabilities	1,653.0		1.2		1,654.2
Retained earnings	949.5		3.6		953.1
Total shareholders' equity	1,266.7		3.6		1,270.3
Total liabilities and equity	$	2,969.8	$	4.8	$	2,974.6


Consolidated Statement of Cash Flows
(in millions)	Year Ended December 31, 2021
	As Reported 1		Effect of Change		As Adjusted
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$	179.1	$	(0.8)	$	178.3
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Deferred income taxes	(5.4)		(0.1)		(5.5)
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories	(5.9)		0.5		(5.4)

Net cash provided by operating activities of continuing operations	$	123.7	$	(0.4)	$	124.1

CASH FLOW OF DISCONTINUED OPERATIONS
Operating cash flows	17.5		0.4		17.9
Net cash provided by discontinued operations	$	13.7	$	0.4	$	14.1


Consolidated Statement of Cash Flows
(in millions)	Year Ended December 31, 2020
	As Reported 1		Effect of Change		As Adjusted
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$	185.7	$	(7.7)	$	178.0
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Income from discontinued operations, net of taxes	(206.3)		7.3		(199.0)
Deferred income taxes	(8.9)		(0.1)		(9.0)
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories	12.1		0.5		12.6
Net cash provided by operating activities of continuing operations	$	42.1	$	—	$	42.1

1 As Reported represents the consolidated financial statement balances that have been recast for discontinued operations exclusive of the impact of our change in accounting method from LIFO to FIFO.

Revenue Recognition – The largest stream of revenue is product revenue for shipments of the various products discussed further in Note 19, "Business Segment Information," along with a smaller amount of revenue from services that typically take place over a short period of time. We recognize revenue at a point in time following the transfer of control, which typically occurs when a product is shipped or delivered, depending on the terms of the sale agreement, or when services are rendered. Shipping costs billed to customers are recognized as revenue and expensed in cost of goods sold as a fulfillment cost when control of the product transfers to the customer. Payment from customers is typically due within 30 days of the sale for sales in the U.S. For sales outside of the U.S., payment terms may be longer based upon local business customs, but are typically due no later than 90 days after the sale.

At December 31, 2022, we had a backlog of orders of continuing operations valued at $310.7 million of which $123.9 million related to Sealing Technologies and $186.8 million related to Advanced Surface Technologies compared with $274.7 million at December 31, 2021 of which $102.8 million related to Sealing Technologies and $171.9 million related to Advanced Surface Technologies. Approximately 7% of the backlog is expected to be filled beyond 2023. Backlog represents orders on hand we believe to be firm. However, there is no certainty the backlog orders will result in actual sales at the times or in the amounts ordered.

Redeemable Non-Controlling Interests – Non-controlling interests in subsidiaries that are redeemable for cash or other assets outside of the our control are classified as mezzanine equity, outside of equity and liabilities, at the greater of the carrying value or the redemption value. The increases or decreases in the estimated redemption amount are recorded with corresponding adjustments against equity and are reflected in the computation of earnings per share. At December 31, 2022, the redeemable non-controlling interest relates solely to Alluxa.

Foreign Currency Translation – The financial statements of those operations whose functional currency is a foreign currency are translated into U.S. dollars using the current rate method. Under this method, all assets and liabilities are translated into U.S. dollars using current exchange rates, and income statement activities are translated using average exchange rates. The foreign currency translation adjustment is included in accumulated other comprehensive income (loss) in the Consolidated Balance Sheets. Gains and losses on foreign currency transactions are included in operating income. Foreign currency transaction losses (gains) totaled $(4.8) million, $1.7 million, and $3.0 million, respectively, in 2022, 2021, and 2020.

Research and Development Expense – Costs related to research and development activities are expensed as incurred. We perform research and development primarily under Company-funded programs for commercial products. Research and development expenditures in 2022, 2021, and 2020 were $10.1 million, $9.8 million, and $9.4 million, respectively, and are included in selling, general and administrative expenses in the Consolidated Statements of Operations.

Income Taxes – We use the asset and liability method of accounting for income taxes. Temporary differences arising between the tax basis of an asset or liability and its carrying amount on the Consolidated Balance Sheet are used to calculate future income tax assets or liabilities. This method also requires the recognition of deferred tax benefits, such as net operating loss carryforwards. Valuation allowances are recorded as appropriate to reduce deferred tax assets to the amount considered likely to be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to the taxable income (losses) in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the date of enactment of the change. A tax benefit from an uncertain tax position is recognized only if we believe it is more likely than not that the position will be sustained on its technical merits. If the recognition threshold for the tax position is met, only the portion of the tax benefit that we believe is greater than 50 percent likely to be realized is recorded. Our future results may include favorable or unfavorable adjustments to our estimated tax liabilities due to closure of income tax examinations, statute expirations, new regulatory or judicial pronouncements, changes in tax laws, changes in projected levels of taxable income, future tax planning strategies, or other relevant events.

The Tax Cuts and Jobs Act (the "Tax Act") provides for a territorial tax system, that includes the global intangible low-taxed income (“GILTI”) provision beginning in 2018. The GILTI provisions require us to include in our U.S. income tax return certain current year foreign subsidiary earnings net of foreign tax credits, subject to limitation. We elected to account for the GILTI tax in the period in which it is incurred.

Cash and Cash Equivalents – Cash and cash equivalents include cash on hand, demand deposits and highly liquid investments with a maturity of three months or less at the time of purchase.

Receivables – Accounts receivable are stated at the historical carrying amount net of write-offs and allowance for doubtful accounts. We establish an allowance for doubtful accounts receivable based on historical experience and any specific

customer collection issues we have identified. Doubtful accounts receivable are written off when a settlement is reached for an amount less than the outstanding historical balance or when we have determined the balance will not be collected.

Property, Plant and Equipment – Property, plant and equipment are recorded at cost. Depreciation of plant and equipment is determined on the straight-line method over the following estimated useful lives of the assets: buildings and improvements, 5 to 25 years; machinery and equipment, 3 to 10 years.

Goodwill and Other Intangible Assets – Goodwill represents the excess of the purchase price over the estimated fair value of the net assets of acquired businesses. Goodwill is not amortized, but instead is subject to impairment testing that is conducted at least annually each calendar year in the fourth quarter. We transitioned from an October 1 annual testing date to a November 1 annual testing date in the fourth quarter of 2021. In making the transition, we performed annual impairment testing for our intangibles on both dates in the fourth quarter of 2021.

The goodwill asset impairment test involves comparing the fair value of a reporting unit to its carrying amount. An impairment charge is recognized when the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized would not exceed the total amount of goodwill allocated to that reporting unit. Interim tests during the year may be required if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

To estimate the fair value of our five reporting units, we use both a discounted cash flow and a market valuation approach. The discounted cash flow approach uses cash flow projections and a discount rate to calculate the fair value of each reporting unit while the market approach relies on market multiples of similar companies. The key assumptions used for the discounted cash flow approach include projected revenues and profit margins, projected capital expenditures, changes in working capital, and the current discount and tax rates. For the market approach, we select a group of peer companies that we believe are best representative of each reporting unit. We used a 75% weighting for the discounted cash flow valuation approach and a 25% weighting for the market valuation approach, reflecting our belief that the discounted cash flow valuation approach is a better indicator of a reporting unit's value since it reflects the specific cash flows anticipated to be generated in the future by the business.

In the second quarter of 2022, we determined the performance of our Alluxa reporting unit to be a triggering event for an interim goodwill impairment test and, as a result, we performed an assessment as of June 30, 2022. The fair value of our Alluxa reporting unit, which is included in our Advanced Surface Technologies segment, and is allocated $126.0 million of goodwill, exceeded its carrying value by approximately 21% as of the interim testing date.

At the time of our annual test as of November 1, 2022, our updated forecast and projections based upon our annual strategic plan indicated that Alluxa’s cash flows were below the June 30, 2022 assessment estimates, and the discount rate to determine fair value utilizing the income approach was significantly higher. The projection and analysis indicated that the book value of the Alluxa reporting unit exceeded fair value by $65.2 million which has been recognized as an impairment charge in the fourth quarter of 2022. The discount rate to determine the fair value of Alluxa increased from 12.0% as of November 1, 2021 to 14.6% as of November 1, 2022, resulting in a $50 million decline in the fair value of the Alluxa reporting unit utilizing the income approach. A 1% increase in the discount rate as of November 1, 2022 to 15.6% would decrease the fair value of the Alluxa reporting unit and result in an increase in the amount of the impairment being recognized by $11.2 million.

The fair value of our semiconductor reporting unit, included in the Advanced Surface Technologies segment, exceeded book value by 21.8% as of November 1, 2022. A 1% increase in the discount rate as of November 1, 2022 would result in a decrease in the cushion in the test to 12.7%. Separately, a 1% decline in the year-over-year revenue growth rates over the projection period would lower the cushion to 17.3%. The combination of a 1% increase in the discount rate and a 1% decline in the year-over-year revenue growth rates would lower the cushion to 8.8%.

The fair value of the three reporting units of our Sealing Technologies segment all exceeded their respective carrying values by more than 60% as of November 1, 2022. We completed our annual impairment tests of goodwill as of November 1, 2021, October 1, 2021 and 2020 with no impairment indicated.

Annual assessments are conducted in the context of information that was reasonably available to us as of the date of the assessment including our best estimates of future sales volumes and prices; material and labor cost and availability; operational efficiency including the impact of projected capital asset additions, and the then current discount rates and tax rates. We will perform our next annual goodwill impairment tests as of November 1, 2023; or earlier, if adverse changes in circumstances result in our assessment that a triggering event has occurred at any of our reporting units and an interim test is required.

Other intangible assets are recorded at cost or, when acquired as a part of a business combination, at estimated fair value. These assets include customer relationships, patents and other technology-related assets, trademarks, licenses, and non-compete agreements. Intangible assets that have definite lives are amortized using a method that reflects the pattern in which the economic benefits of the assets are consumed or the straight-line method over estimated useful lives of 1 to 21 years. Intangible assets with indefinite lives are subject to at least annual impairment testing, which were conducted as of November 1 in 2022 and 2021, and as of October 1, 2021 and 2020. The impairment testing compares the fair value of the intangible asset with its carrying amount using the relief from royalty method. The test completed as of November 1, 2022 and 2021, indicated no impairment. Interim tests may be required if an event occurs or circumstances change that would more likely than not reduce the fair value below the carrying value or change the useful life of the asset.

In 2020, sales declines by businesses utilizing two of the indefinite-lived trademarks within our Sealing Technologies segment were determined to be triggering events for an interim impairment analysis. Based on the results of this analysis, we recorded a $16.1 million impairment of indefinite-lived trademarks in the third quarter of 2020.

Debt – Debt issuance costs associated with our senior secured revolving credit facility are presented as an asset and subsequently amortized into interest expense ratably over the term of the revolving debt arrangement. Debt issuance costs associated with any of our other debt instruments that are incremental third-party costs of issuing the debt are recognized as a reduction in the carrying value of the debt and amortized into interest expense over the time period to maturity using the interest method.

Derivative Instruments – We use derivative financial instruments to manage our exposure to various risks. The use of these financial instruments modifies the exposure with the intent of reducing our risk. We do not use financial instruments for trading purposes, nor do we use leveraged financial instruments. The counterparties to these contractual arrangements are major financial institutions. We use multiple financial institutions for derivative contracts to minimize the concentration of credit risk. The current accounting rules require derivative instruments, excluding certain contracts that are issued and held by a reporting entity that are both indexed to its own stock and classified in shareholders’ equity, be reported in the Consolidated Balance Sheets at fair value and that changes in a derivative’s fair value be recognized currently in earnings unless specific hedge accounting criteria are met.

Fair Value Measurements – Fair value is defined 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.

We utilize a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

•Level 1: Observable inputs such as quoted prices in active markets for identical assets or liabilities.

•Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

•Level 3: Unobservable inputs that reflect our own assumptions.

The fair value of intangible assets associated with acquisitions is determined using an income valuation approach. Projecting discounted future cash flows requires us to make significant estimates regarding projected revenues and profit margins, projected capital expenditures, changes in working capital, discount rates, attrition rates, royalty rates, obsolescence rates and tax rates. This non-recurring fair value measurement would be classified as Level 3 due to the absence of quoted market prices or observable inputs for assets of a similar nature.

We review the carrying amounts of long-lived assets when certain events or changes in circumstances indicate that the carrying amounts may not be recoverable. An impairment loss is recognized when the carrying amount of the asset group is not recoverable and exceeds its fair value. We estimate the fair values of assets subject to long-lived asset impairment based on our own judgments about the assumptions that market participants would use in pricing the assets. In doing so, we use a market approach when available or an income approach based upon discounted cash flows. The key assumptions used for the discounted cash flow approach include expected cash flows based on internal business plans, projected growth rates, discount rates, and royalty rates for certain intangible assets. We classify these fair value measurements as Level 3.

Similarly, the fair value computations for the recurring impairment analyses of goodwill and indefinite-lived intangible assets would be classified as Level 3 due to the absence of quoted market prices or observable inputs. The key assumptions used for the discounted cash flow approach include projected revenues and profit margins, projected capital expenditures, changes in working capital, discount rates, tax rates and royalty rates for certain indefinite-lived intangible assets. Significant changes in any of those inputs could result in a significantly different fair value measurement.

Pensions and Postretirement Benefits - Amortization of the net gain or loss resulting from experience different from that assumed and from changes in assumptions is included as a component of benefit cost. If, as of the beginning of the year, that net gain or loss exceeds 10% of the greater of the projected benefit obligation or the market-related value of plan assets, the amortization is that excess divided by the average remaining service period of participating employees expected to receive benefits under the plan. We amortize prior service cost using the straight-line basis over the average future service life of active participants.For segment reporting purposes, we allocate service cost to each location generating those costs. All other components of net periodic pension cost are reported in other (non-operating) expense.

Discontinued Operation

12 Months Ended

Dec. 31, 2022

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operation


2.			Discontinued Operation

On January 30, 2023 we completed the sale of GPT for approximately $31 million resulting in a pretax gain of approximately $14 million to be recognized in the first quarter of 2023. Net cash proceeds after selling expenses was approximately $28 million.

In the third quarter of 2022, we entered into an agreement to sell our GGB business and announced our intention to sell Garlock Pipeline Technologies, Inc. (GPT). These businesses, along with Compressor Products International (CPI), which was divested on December 21, 2021, comprised our entire Engineered Materials segment ("Engineered Materials"). As a result of classifying the GGB and GPT businesses as held for sale in the third quarter of 2022, we determined Engineered Materials to be discontinued operations. Accordingly, we have reported, for all periods presented, the financial condition, results of operations, and cash flows of Engineered Materials as discontinued operations in the accompanying financial statements.

The sale of GGB closed on November 4, 2022 to The Timken Company for total proceeds of $305 million, subject to closing date purchase price adjustments. We recorded a pre-tax gain of $189.1 million as part of our discontinued operations in the fourth quarter of 2022. The sale of GGB included a subsidiary of our Sealing Technologies segment which is not part of the discontinued operations described above. We recorded a pre-tax loss of $0.4 million related to the sale of this subsidiary. The loss on sale as well as operating activity of this subsidiary are included in continuing operations for all periods being reported.

On December 21, 2021, we completed the sale of specified equity interests and assets of our CPI, which had been included in our Engineered Materials segment. We received $185.7 million, net of transaction fees and cash sold, resulting in a pre-tax book gain of $117.6 million as part of our discontinued operations.

During the fourth quarter of 2019, we entered into an agreement to sell the Fairbanks Morse division, which comprised our entire Power Systems segment. The sale of Fairbanks Morse to an affiliate of funds managed by private equity firm Arcline Investment Management closed on January 21, 2020 for a sales price of $450 million. The pre-tax gain on the disposition of Fairbanks Morse was $264.7 million. We have reported, for all periods presented, the results of operations and cash flows of the Power System segment as a discontinued operation in the accompanying financial statements.

The results of our discontinued operations were as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Net sales	$	188.9	$	301.4	$	281.6
Cost of sales	124.6		192.1		190.8
Gross profit	64.3		109.3		90.8
Operating expenses:
Selling, general, and administrative expenses	43.8		76		71.1
Other	0.2		3.6		16.4
Total operating expenses	44.0		79.6		87.5
Operating income from discontinued operations	20.3		29.7		3.3
Other expense	—		—		(7.5)
Income (loss) from discontinued operations before income taxes	20.3		29.7		(4.2)
Income tax benefit (expense)	1.8		(13.9)		1.3
Income (loss) from discontinued operations, net of taxes before gain from sale of discontinued operations	22.1		15.8		(2.9)
Gain from sale of discontinued operations, net of taxes	176.3		105.2		201.9
Income from discontinued operations, net of taxes	$	198.4	$	121.0	$	199.0

The major classes of assets and liabilities for our discontinued Engineered Materials segment are shown below:


(in millions)	December 31, 2022		December 31, 2021
Assets:
Accounts receivable	$	3.8	$	32.0
Inventories	3.1		28.8
Property, plant and equipment	7.6		52.4
Goodwill	—		5.1
Other intangible assets	1.2		19.2
Other assets	0.2		12.4
Current assets of discontinued operations	$	15.9	$	149.9

Liabilities
Accounts payable	$	1.4	$	9.9
Accrued expenses	0.9		18.8
Other liabilities	—		7.1
Current liabilities of discontinued operations	$	2.3	$	35.8

Pursuant to applicable accounting guidance for the reporting of discontinued operations, allocations to our Engineered Materials segment for corporate services not expected to continue at the divested business subsequent to closing have not been reflected in the above financial statements of discontinued operations and have been reclassified to income from continuing operations in our accompanying consolidated financial statements for all periods. In addition, divestiture-related costs previously not allocated to our Engineered Materials segment that were incurred as a result of the divestiture of Engineered

Materials have been reflected in the financial results of discontinued operations. As a result, income (loss) from discontinued operations before income taxes of Engineered Materials has been decreased by $1.7 million for the year ended December 31, 2022 and increased $2.4 million, and $3.9 million, respectively, for the years ended December 31, 2021, and 2020 with offsetting changes in corporate expenses of continuing operations.

Acquisitions and Dispositions

12 Months Ended

Dec. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Acquisitions and Dispositions


3.			Acquisitions and Dispositions

Acquisitions

On December 17, 2021, our subsidiary, EnPro Holdings, Inc. ("EnPro Holdings"), completed the acquisition of all issued and outstanding membership interests of TCFII NxEdge LLC (“NxEdge”). Based in Boise, Idaho, NxEdge serves customers across the semiconductor supply chain, including top tier global integrated device manufacturers and original equipment manufacturers from six main facilities located in Idaho and California. With vertically integrated capabilities across the semiconductor value chain, including a robust aftermarket business, NxEdge is a leading supplier offering a set of integrated capabilities with unique processes resulting in a broad range of qualifications at top customers. NxEdge is included in our Advanced Surface Technologies segment.

The acquisition was paid for with $853.9 million in cash, net of cash acquired. We funded the payment with available cash on hand, borrowings under our revolving credit facility and borrowings under new term loan facilities. Additionally, there were $15.0 million of acquisition-related costs recorded during the year ended December 31, 2021, which were expensed when incurred and included in selling, general and administrative expense in the accompanying Consolidated Statement of Operations for the year then ended.

On October 26, 2020, a subsidiary of EnPro formed for this purpose (the "Alluxa Acquisition Subsidiary") acquired all of the equity securities of Alluxa, Inc. ("Alluxa"), a privately held, California-based company. Alluxa is an industrial technology company that provides specialized optical filters and thin-film coatings for the most challenging applications in the industrial technology, life sciences, and semiconductor markets. Alluxa's products are developed through a proprietary coating process using state-of-the-art advanced equipment. Alluxa is included with the Advanced Surface Technologies segment.

Alluxa works in collaboration with customers across major end markets to provide customized, complex precision coating solutions through its specialized technology platform and proprietary processes. Alluxa has cultivated long-standing customer relationships across its diversified customer base. Alluxa’s global distribution capabilities support the company’s international reach, serving customers across the Americas, Europe, and Asia. Founded in 2007, Alluxa has two locations in California and is headquartered in Santa Rosa, California.

The acquisition was paid for with $238.4 million, net of cash acquired, plus rollover equity from three Alluxa executives (the “Alluxa Executives”). Additionally, there were $5.0 million of acquisition-related costs recorded during the year ended December 31, 2020 related to this transaction which were expensed during the period and included in selling, general and administrative expense in the accompanying Consolidated Statement of Operations.

In connection with the completion of the transaction, we entered into a limited liability operating agreement (the “Alluxa LLC Agreement”) with respect to the “Alluxa Acquisition Subsidiary” in connection with the rollover transaction with the Alluxa Executives receiving approximately 7% of the equity interests of the Alluxa Acquisition Subsidiary in return for their contribution of the rollover shares of Alluxa. Pursuant to the Alluxa LLC Agreement, each Alluxa Executive has the right to sell to us, and we have the right to purchase from each Alluxa Executive (collectively, the “Put and Call Rights”), one-third of the Alluxa Executive equity interests in the Alluxa Acquisition Subsidiary during each of three exercise periods in 2024, 2025 and 2026, with any amount not sold or purchased in a prior exercise period being carried forward to the subsequent exercise periods (although for one Alluxa Executive who transitioned to a consulting role on January 1, 2023, the full amount of his equity interests are subject to the Company’s right to purchase on June 30, 2024, with two-thirds of the equity interests purchasable at the fixed value of the equity interests as set forth in the Alluxa LLC Agreement). The Alluxa LLC Agreement also provides for the purchase by us of all of an Alluxa Executive's equity interests in the Alluxa Acquisition Subsidiary in connection with the termination of employment of the Alluxa Executive under specified circumstances, with payments in certain circumstances to be made in annual installments. In certain cases involving the termination of an Alluxa Executive's employment, the consideration payable to an Alluxa Executive for the purchase of his equity interests is equal to the fixed value set forth in the Alluxa LLC Agreement (an aggregate of $17.85 million for all of the Alluxa Executives). In all other cases, including upon any exercise of the Alluxa Put and Call Rights, the consideration payable under the Alluxa LLC Agreement in connection with any such purchase by us of an Alluxa Executive's equity interests in the Alluxa Acquisition Subsidiary is equal to the greater of the fixed value of the equity interests as set forth in the Alluxa LLC Agreement or a price based upon a multiple of twelve-month adjusted EBITDA based upon certain financial metrics of the Alluxa Acquisition Subsidiary, plus

cash and less indebtedness of the Alluxa Acquisition Subsidiary prior to the relevant payment, and subject to certain adjustments dependent upon the circumstances of the purchase and sale.

On September 25, 2019, we acquired all of the equity securities of LeanTeq Co., Ltd. and its affiliate LeanTeq LLC (collectively referred to as “LeanTeq”). LeanTeq primarily provides refurbishment services for critical components and assemblies used in state-of-the-art semiconductor equipment. This equipment is used to produce the latest and most technologically advanced microchips for smartphones, autonomous vehicles, high-speed wireless connectivity, artificial intelligence, and other leading-edge applications. Founded in 2011 and headquartered in Taoyuan City, Taiwan, LeanTeq has two locations in Taiwan and one in the United States (Silicon Valley). LeanTeq is included within the Advanced Surface Technologies segment.

A limited liability company agreement (the "LeanTeq LLC Agreement") entered into with respect to Lunar as part of the LeanTeq acquisition, provided EnPro with the right to buy from each LeanTeq Executive (each a LeanTeq "Call Option”), and each LeanTeq Executive with the right to sell to EnPro (the "Put Option") such LeanTeq Executive's Rollover Equity as follows:

EnPro had the right to buy, and the LeanTeq Executive had the right to sell, such Rollover Equity within 90 days following the third anniversary of the closing and payable in two installments as follows (the "Put/Call Price"):

•Half of the price payable for the Rollover Equity is to be equal to a pro rata portion of a multiple of EBITDA (as defined) of Lunar (on a consolidated basis) during the last 12 months (“LTM”) ending on the closest month end prior to the last month end before the purchase or sale (the "First Measurement Date") less Lunar's consolidated net debt in excess of cash as of the First Measurement Date (the "First Exercise Price"). The applicable multiple depends on the future LTM EBITDA margin and revenue growth;

•The remaining half of the price payable for the Rollover Equity is to be equal to an amount that is the higher of the First Exercise Price and a pro rata portion of a multiple of EBITDA of Lunar (on a consolidated basis) during the LTM prior to the first anniversary of the First Measurement Date (the "Second Measurement Date") less Lunar's consolidated net debt in excess of cash as of the Second Measurement Date. The applicable multiple depends on the future LTM EBITDA margin and revenue growth.

•During the fourth quarter of 2022, EnPro acquired all the equity securities of Lunar owned by the LeanTeq Executives for an anticipated $42.8 million and became the sole owner of LeanTeq. As a result of this purchase transaction, $35.0 million of our Redeemable Non-Controlling Interests was reclassified as a liability. We entered into a subsequent agreement with the LeanTeq Executives where we agreed to pay the full Put/Call Price calculated at the First Measurement Date and paid $41.9 million in December 2022, which was the minimum purchase price for these equity securities, of which $7.8 million eliminated our outstanding deferred compensation liability and $34.1 million reduced the liability attributable to the redeemable non-controlling interest acquisition. We anticipate an additional $0.8 million payment in December of 2023 based on Put/Call Price determined at the Second Measurement Date, which is subject to the financial performance of LeanTeq through November 2023. We have recorded this anticipated $0.8 million payment as a liability included in accrued expenses on our consolidated balance sheet as of December 31, 2022.

The fair value of the Alluxa Executives' equity interests and the LeanTeq Executives' Rollover Equity was estimated as of the closing date of those transactions. Due to the presence of the put arrangements and thus that redemption is not solely within our control, the Alluxa Executives' equity interests is, and, prior to December 2022, the LeanTeq Executives' Rollover Equity had been, presented as redeemable non-controlling interests. We initially recognized the amount at fair value, inclusive of the put-call provisions. We adjust the redeemable non-controlling interests when the redemption value exceeds the carrying value with changes recognized as an adjustment to equity.

Sales of $8.6 million and a pre-tax loss of $1.9 million for NxEdge are included in our Consolidated Statement of Operations for the year ended December 31, 2021. Sales of $5.7 million and a pre-tax loss of $6.1 million for Alluxa are included in our Consolidated Statement of Operations for the year ended December 31, 2020. The following unaudited pro forma condensed consolidated financial results of operations for the years ended December 31, 2022, 2021, and 2020 are presented as if these acquisitions had been completed before January 1, 2020:



	2022		2021		2020

Pro forma net sales	$	1,099.2	$	1,318.2	$	1,275.2
Pro forma net income (loss) from continuing operations	16.2		202.4		(19.5)

These amounts have been calculated after applying our accounting policies and adjusting the results of NxEdge and Alluxa to reflect the additional depreciation and amortization that would have been charged assuming the fair value adjustments to inventory, property, plant and equipment and intangible assets had been applied prior to January 1, 2020 as well as additional interest expense to reflect financing required, together with the corresponding tax effects. The supplemental pro forma net income for the year ended December 31, 2021 was adjusted to exclude $15.0 million of pre-tax acquisition-related costs. The supplemental pro forma net income for the year ended December 31, 2020 was adjusted to exclude $5.0 million of pre-tax acquisition-related costs. These pro forma financial results have been prepared for comparative purposes only and do not reflect the effect of synergies that would have been expected to result from the integration of these acquisitions. The pro forma information does not purport to be indicative of the results of operations that actually would have resulted had the acquisitions occurred prior to January 1, 2020, or of future results of the consolidated entities.

Dispositions

On September 2, 2021, we sold certain assets and liabilities of our polymer components business unit, which was principally located in Houston, Texas and had been included in our Sealing Technologies segment. As a result of the sale, we recorded a pre-tax gain of $19.5 million in other income (expense) on our Consolidated Statement of Operations.

On December 31, 2020, we sold the shares of Technetics Group UK Limited ("Technetics Group UK"), a manufacturer of elastomeric components primarily for use in the aerospace industry, which had been included in our Sealing Technologies segment, for a nominal cash purchase price. As part of the agreement with the buyer, we delivered to the buyer £148,000 of cash to fund value added tax ("VAT") payments due for VAT liabilities already incurred and £50,000 for working capital. We incurred a loss upon the sale of approximately £976,000 ($1.3 million). Upon the resolution of all remaining open items, we recorded an additional gain of $0.1 million in the first quarter of 2021.

On November 20, 2020, we completed the sale of the Air Springs portion of our heavy-duty trucking business for $23.1 million in cash, net of an estimated working capital adjustment and fees, and a long-term promissory note with a fair-value of $6.4 million (face value of $7.5 million). As part of the agreement with the buyer, we retained the U.S. accounts receivable for the business, which created a large working capital adjustment at closing. The amount of retained accounts receivable in the U.S. was approximately $8.6 million. We recorded a $0.1 million loss on sale of this business, which had been included in our Sealing Technologies segment in the fourth quarter of 2020. Upon the resolution of all remaining open items, we recorded an additional loss of $2.1 million in the first quarter of 2021.

In August of 2020, subsequent to announcing the exit of our Motor Wheel® brake drum and Crewson® brake adjuster brands in the second quarter of 2020, we identified a buyer and entered into a definitive agreement to sell the assets related to the businesses. On September 2, 2020, we completed the sale for $8.9 million, net of transaction fees. This transaction resulted in a $3.1 million loss on sale of the business in other income (expense) on our Consolidated Statement of Operations, comprised of a $3.0 million non-cash loss on the sale of assets and a $0.1 million loss on other expenses. Prior to finding a buyer of the brands, we determined the assets were impaired and recorded restructuring and impairment charges of $7.4 million in other operating (income) expense on our Consolidated Statement of Operations. Total losses on the exit of our Motor Wheel® brake drum and Crewson® brake adjuster brands, which had been included in our Sealing Technologies segment, recorded in 2020 were $10.5 million.

In the second quarter of 2020 we entered into an agreement to sell the Lunar® air disc brake business located in both the U.S. and in Shanghai, China. The sale of the U.S. assets of the business closed in the third quarter of 2020 for $0.3 million, resulting in a gain of $0.2 million recorded in other income (expense) on our Consolidated Statement of Operations. The sale of the Lunar® manufacturing facility located in Shanghai, China closed in the fourth quarter of 2020 for $0.9 million, resulting in a loss of $0.1 million. Prior to closing on the sale of the business, we determined the assets to be impaired and recorded a $2.1 million impairment charge, of which $1.6 million was related to impairment of long-lived assets and $0.5 million related to the impairment of inventory. The impairment of long-lived assets was recorded in other operating (income) expense and the impairment of inventory was recorded in cost of sales on our Consolidated Statement of Operations. Total net loss related to the exit of the Lunar® air disc brake business, which had been included in our Sealing Technologies segment, was $1.9 million.

For a further discussion of the impairment charges recorded in connection with the Motor Wheel® brake drum and Crewson® brake adjuster brands and the Lunar® air disc brake business, see Note 4, "Other Income (Expense)".

See Note 2, "Discontinued Operations," for information related to the disposition of our Engineered Materials segment and the Fairbanks Morse division, which comprised the entire Power Systems segment.

Other Income (Expense)

12 Months Ended

Dec. 31, 2022

Other Income and Expenses [Abstract]

Other Income (Expense)


4.			Other Income (Expense)

Operating

We incurred $3.0 million, $2.5 million and $30.4 million of restructuring and impairment costs, excluding goodwill impairment, for the years ended December 31, 2022, 2021 and 2020, respectively. See Note 1, "Overview, Basis of Presentation, and Significant Accounting Policies" for information related to a goodwill impairment charge incurred in 2022.

Of the restructuring and impairment costs incurred in 2022 we incurred $1.8 million of restructuring costs related to the reorganization of sites and functions, primarily in the United States and $1.2 million of non-cash impairment charges of long-lived assets. Workforce reductions associated with our restructuring activities totaled 25 administrative and manufacturing positions.

During 2021, we conducted a number of restructuring activities throughout our operations which was mostly comprised of targeted workforce reductions. All costs associated with such initiatives were incurred in 2021. Workforce reductions associated with our restructuring activities totaled 36 administrative and manufacturing positions.

In the fourth quarter of 2020, we decided to exit the manufacturing of metallic gaskets. As a result of this decision, we evaluated the product line and determined the assets were impaired. We recorded a $1.5 million impairment, of which $1.4 million was related to the impairment of long-lived assets and $0.1 million was related to inventory.

In the third quarter of 2020, sales declines by businesses utilizing two of the indefinite-lived trademarks within our Sealing Technologies segment were determined to be triggering events for an interim impairment analysis. Based on the results of this analysis, we recorded a $16.1 million impairment of indefinite-lived trademarks in the third quarter.

The exit from our Motor Wheel® brake drum and Crewson® brake adjuster brands resulted in restructuring and impairment charges of $7.4 million in 2020, of which $3.6 million was related to inventory impairment charges, $3.5 million was impairment of intangible assets, and $0.3 million related to severance, contract cancellation costs, and other expenses. million.

In the second quarter of 2020, we entered into an agreement to sell the Lunar® air disc brake business. As a result of this agreement, we incurred $1.9 million in impairment charges, of which $1.4 million related to impairment of long-lived assets and $0.5 million related to impairment of inventory.

In addition to the above mentioned restructuring and impairment charges, we undertook various other smaller restructuring and impairment action in 2020 that resulted in recording $3.3 million of restructuring related to severance and other exit costs and $0.2 million of impairment related to inventory of discontinued product lines.

Workforce reductions in 2020 associated with the aforementioned restructuring actions totaled 101 administrative and manufacturing positions.

Restructuring and impairment costs by reportable segment are as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Sealing Technologies	$	0.7	$	2.4	$	30.3
Advanced Surface Technologies	1.3		—		0.1
Corporate	1.0		0.1		—
	$	3.0	$	2.5	$	30.4

Also included in other operating income (expense) for the year ended December 31, 2022, 2021, and 2020 were $0.1 million, $(0.1) million, and $0.2 million of other costs, respectively.

Non-Operating

During 2022, 2021 and 2020, we recorded expense of $5.1 million, $8.3 million and $36.0 million, respectively, due to environmental reserve increases based on additional information at several specific sites and other ongoing obligations of previously owned businesses. Refer to Note 20, "Commitments and Contingencies - Environmental," for additional information about our environmental liabilities.

We report the service cost component of pension and other postretirement benefits expense in operating income in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are presented in other income (expense). For the years ended December 31, 2022, 2021 and 2020, we reported approximately $3.6 million, $8.5 million and $3.1 million, respectively, of income on the Consolidated Statements of Operations related to the components of net benefit cost other than service cost. Refer to Note 15, "Pensions and Postretirement Benefits," for additional information regarding net benefit costs.

In connection with the sale of GGB, accounted for as a discontinued operation, in the fourth quarter of 2022, we issued a note between a domestic and foreign entity that was denominated in a foreign currency. As a result, we recorded a $3.8 million loss due to the change in exchange rate in December 2022. In January 2023, we hedged the outstanding notes and expect the future gains or losses to be minimal.

In 2022, we evaluated our outstanding long-term receivable related to anticipated receipts from legacy asbestos insurance claims and adjusted the receivable down by $2.8 million.

In connection with the acquisition of Aseptic in 2019, we recognized a liability for uncertain tax positions and a related indemnification asset for the portion of that liability recoverable from the seller. We determined the statute of limitations expired on some of the uncertain tax positions in 2022 and 2021 and, accordingly, removed a portion of the liability and receivable. For the year ended December 31, 2022 and 2021, the release of the related liability was recorded as part of our tax expense and we recorded a $0.9 million and $3.0 million expense, respectively, related to the reversal of the receivable in other non-operating income (expense) on our consolidated statement of operations.

In 2021, we recorded a pre-tax gain of $17.5 million primarily related to the sale of our polymer components business unit, which was principally located in Houston, Texas and included in our Sealing Technologies segment. Sales reported for this business included in our net sales for the years ended December 31, 2021 and 2020 were $21.4 million and $26.4 million, respectively.

In 2020, we recorded a pretax loss of $2.7 million related to the sale of several businesses, including the Technetics Group UK Limited business, the Air Springs portion of our heavy-duty trucking business, our Motor Wheel® brake drum and Crewson® brake adjuster brands, and our Lunar ® air disc brake business located in our Sealing Technologies segment. Sales reported for the divested businesses included in our net sales for the year ended December 31, 2020 $110.1 million. For a further discussion on businesses disposed of, see Note 3, "Acquisitions and Dispositions."

Additional disclosures are not presented since the assets, liabilities and results of our disposed operations are not significant to our consolidated financial position or results of operations.

Income Taxes

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income (loss) from continuing operations before income taxes as shown in the Consolidated Statements of Operations consists of the following:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Domestic	$	(77.2)	$	(1.8)	$	(85.9)
Foreign	105.5		67.8		62.4
Total	$	28.3	$	66.0	$	(23.5)

A summary of income tax expense (benefit) from continuing operations in the Consolidated Statements of Operations is as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Current:
Federal	$	15.0	$	(3.7)	$	(15.1)
Foreign	23.2		17.8		21.5
State	0.2		0.1		0.1
	38.4		14.2		6.5
Deferred:
Federal	(8.9)		2.4		(5.1)
Foreign	(6.4)		(6.8)		(2.6)
State	1.3		(1.1)		(1.3)
	(14.0)		(5.5)		(9.0)
Total	$	24.4	$	8.7	$	(2.5)

The GILTI provisions require us to include in our U.S. income tax return certain current foreign subsidiary earnings net of foreign tax credits, subject to limitation. We elected to account for the GILTI tax in the period in which it is incurred. As a result of these provisions, our effective tax rate was increased by 5.2% due to GILTI.

Significant components of deferred income tax assets and liabilities are as follows:


	As of December 31,
	2022		2021
	(in millions)
Deferred income tax assets:
Net operating losses and tax credits	$	18.5	$	22.8
Environmental reserves	10.2		11.4
Accruals and reserves	2.4		2.9
Operating leases	10.8		12.5


Interest	7.1		8.8
Compensation and benefits	8.6		8.9
Inventories	2.9		—
Retained liabilities of previously owned businesses	0.5		0.7
Postretirement benefits other than pensions	0.3		0.3
Other	2.5		—
Gross deferred income tax assets	63.8		68.3
Valuation allowance	(10.7)		(8.9)
Total deferred income tax assets	53.1		59.4
Deferred income tax liabilities:
Depreciation and amortization	(160.6)		(183.7)
Operating leases	(10.8)		(12.5)
Cross currency swap	(2.1)		(2.1)
Inventories	—		(1.8)
Pension obligations	(1.6)		(5.3)
Other	—		(0.6)

Total deferred income tax liabilities	(175.1)		(206.0)
Net deferred income tax liabilities	$	(122.0)	$	(146.6)

The net deferred income tax liabilities are reflected on a jurisdictional basis as a component of the December 31, 2022 and 2021 Consolidated Balance Sheet line items noted below:


	As of December 31,
	2022		2021
	(in millions)

Other assets (non-current)	$	12.8	$	17.6

Deferred taxes and non-current income taxes payable	(134.8)		(164.2)
Net deferred income tax liabilities	$	(122.0)	$	(146.6)

At December 31, 2022, we had $43.9 million of foreign net operating loss carryforwards, of which $36.8 million expire at various dates from 2027 through 2040 if unused, and $7.1 million have an indefinite carryforward period. We also had state net operating loss carryforwards with a tax effect of $3.9 million which expire at various dates from 2024 through 2042. These net operating loss carryforwards may be used to offset a portion of future taxable income and, thereby, reduce or eliminate our state or foreign income taxes otherwise payable.

Because of the transition tax, GILTI, and Subpart F provisions, undistributed earnings of our foreign subsidiaries totaling $225.1 million at December 31, 2021 have been subjected to U.S. income tax or are eligible for the 100 percent dividends-received deduction under Section 245A of the Internal Revenue Code ("IRC") provided in the Tax Cuts and Jobs Act. Additional undistributed earnings are estimated to be $66.7 million as of December 31, 2022. Whether through the application of the 100 percent dividends received deduction, or distribution of these previously-taxed earnings, we do not intend to distribute foreign earnings that will be subject to any significant incremental U.S. or foreign tax. During 2022, we repatriated $298.3 million of earnings from our foreign subsidiaries, resulting in $2.0 million of withholding taxes net of refunds to be received. We have determined that estimating any tax liability on our investment in foreign subsidiaries is not practicable. Therefore, we have not recorded any deferred tax liability on undistributed earnings of foreign subsidiaries.

We determined, based on the available evidence, that it is uncertain whether certain entities in various jurisdictions will generate sufficient future taxable income to recognize certain of these deferred tax assets. As a result, valuation allowances of $10.7 million and $8.9 million have been recorded as of December 31, 2022 and 2021, respectively. Valuation allowances recorded relate to certain state and foreign net operating losses and other net deferred tax assets in jurisdictions where future taxable income is uncertain. In addition, a valuation allowance of $2.0 million has been recorded against $3.2 million of general foreign tax credit carryforwards due to uncertainty around the ability to generate the requisite foreign source income to utilize that portion of the foreign tax credits. Valuation allowances may arise associated with deferred tax assets recorded in purchase accounting. In accordance with applicable accounting guidelines, any reversal of a valuation allowance that was recorded in purchase accounting reduces income tax expense.

The effective income tax rate from continuing operations varied from the statutory federal income tax rate as follows:


	Percent of Pretax Income Years Ended December 31,
	2022		2021		2020
Statutory federal income tax rate	21.0	%	21.0	%	21.0	%
U.S. taxation of foreign profits, net of foreign tax credits	—		(5.6)		(0.5)
Research and employment tax credits	(2.2)		(1.1)		0.3
State and local taxes	1.5		(1.2)		4.0


Foreign tax rate differences	8.4		10.1		(34.2)

Statutory changes in tax rates	(1.1)		0.2		(1.3)
Valuation allowance	8.1		(5.1)		2.1
Changes in uncertain tax positions	(3.4)		(9.4)		(2.3)
Goodwill impairment	48.4		—		—
Nondeductible expenses	2.3		4.1		(7.6)

GILTI and FDII	4.0		(0.4)		25.4

Other items, net	(0.8)		0.8		3.5
Effective income tax rate	86.2	%	13.4	%	10.4	%

The effective tax rate for 2022 was primarily driven by the goodwill impairment not being deductible for tax, the foreign rate differential related to certain foreign earnings that were subject to higher tax rates, and establishing a valuation allowance on certain tax attributes. The effect of these items resulted in a net $19.9 million increase in income tax expense. Additionally, the effective tax rate was increased by GILTI and decreased by the release of uncertain tax positions associated with audit closures and statute expirations, resulting in a net increase to tax expense of $0.5 million.

As of December 31, 2022 and 2021, we had $4.5 million and $5.5 million, respectively, of gross unrecognized tax benefits. Of the gross unrecognized tax benefit balances as of December 31, 2022 and 2021, $4.1 million and $5.1 million, respectively, would have an impact on our effective tax rate if ultimately recognized.

We record interest and penalties related to unrecognized tax benefits in income tax expense. In addition to the gross unrecognized tax benefits above, we had $1.2 million and $1.5 million accrued for interest and penalties at December 31, 2022 and 2021, respectively. Income tax expense for the year ended December 31, 2022 includes $(0.2) million for interest and penalties related to unrecognized tax benefits. Income tax expense for the years ended December 31, 2021 and 2020 included $(1.7) million and $0.4 million, respectively, for interest and penalties related to unrecognized tax benefits.

A reconciliation of the beginning and ending amount of the gross unrecognized tax benefits (excluding interest) is as follows:


(in millions)	2022		2021		2020
Balance at beginning of year	$	5.5	$	12.2	$	10.1
Additions based on tax positions related to the current year	0.2		0.9		1.9
Additions for tax positions of prior years	(0.2)		(0.2)		0.2

Reductions as a result of a lapse in the statute of limitations	(1.0)		(2.9)		—
Reductions as a result of audit/other settlements	—		(4.5)		—

Balance at end of year	$	4.5	$	5.5	$	12.2

U.S. federal income tax returns for tax years 2019 and forward remain open to examination. We and our subsidiaries are also subject to income tax in multiple state, local and foreign jurisdictions. Various state and foreign tax returns are currently under examination. Substantially all significant state, local and foreign income tax returns for the years 2018 and forward are open to examination. We expect that some of these examinations may conclude within the next twelve months, however, the final outcomes are not yet determinable. In addition, gross unrecognized tax benefits may be reduced by $0.4 million within the next twelve months as the applicable statute of limitation expire.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI https://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Earnings (Loss) Per Share


6.			Earnings (Loss) Per Share

Basic earnings (loss) per share is computed by dividing the income (loss) by the applicable weighted-average number of common shares outstanding for the period. Diluted earnings (loss) per share is calculated using the weighted-average number of shares of common stock as adjusted for any potentially dilutive shares as of the balance sheet date. The computation of basic and diluted earnings per share for calendar years 2022, 2021, and 2020 is as follows (in millions, except per share data):


	2022		2021		2020
Numerator (basic and diluted):
Income (loss) from continuing operations attributable to EnPro Industries, Inc.	$	6.7	$	56.9	$	(21.4)
Income from discontinued operations	198.4		121.0		199.0
Net income	$	205.1	$	177.9	$	177.6
Denominator:
Weighted-average shares – basic	20.8		20.6		20.5
Share-based awards	0.1		0.2		—
Weighted-average shares – diluted	20.9		20.8		20.5
Basic earnings (loss) per share:
Continuing operations	$	0.32	$	2.76	$	(1.05)
Discontinued operations	9.54		5.88		9.69
Net income per share	$	9.86	$	8.64	$	8.64
Diluted earnings (loss) per share:
Continuing operations	$	0.32	$	2.74	$	(1.05)
Discontinued operations	9.51		5.83		9.69
Net income per share	$	9.83	$	8.57	$	8.64

In the year ended December 31, 2020 there were losses attributable to continuing operations. As a result of these losses, there were 0.1 million of potentially dilutive shares excluded from the calculation of diluted earnings per share during that year since they were antidilutive.

Inventories

12 Months Ended

Dec. 31, 2022

Inventory Disclosure [Abstract]

Inventories


7.			Inventories


	As of December 31,
	2022		2021
	(in millions)
Finished products	$	51.5	$	45.0
Work in process	32.7		38.8
Raw materials and supplies	67.7		52.1
Total inventories	151.9		135.9

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment


8.			Property, Plant and Equipment


	As of December 31,
	2022		2021
	(in millions)
Land	$	6.7	$	6.8
Buildings and improvements	69.0		66.7
Machinery and equipment	232.3		231.5
Construction in progress	23.4		9.5
	331.4		314.5
Less accumulated depreciation	(146.2)		(130.2)
Total	$	185.2	$	184.3

Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets


9.			Goodwill and Other Intangible Assets

The changes in the net carrying value of goodwill by reportable segment for the years ended December 31, 2022 and 2021 are as follows:


	Sealing Technologies		Advanced Surface Technologies		Total
	(in millions)


Goodwill as of December 31, 2020	$	297.4	$	307.7	$	605.1
Foreign currency translation	(4.5)		1.4		(3.1)
Acquisition	—		359.5		359.5
Disposition	(13.5)		—		(13.5)


Goodwill as of December 31, 2021	279.4		668.6		948.0
Foreign currency translation	(2.6)		(10.9)		(13.5)
Acquisition	—		0.5		0.5
Disposition	(6.0)		—		(6.0)


Impairment	—		(65.2)		$	(65.2)
Goodwill as of December 31, 2022	$	270.8	$	593.0	$	863.8

The goodwill balances reflected above are net of accumulated impairment losses of $27.8 million for the Sealing Technologies segment as of December 31, 2022, 2021 and 2020 and $65.2 million for the Advanced Surface Technologies segment as of December 31, 2022.

Identifiable intangible assets are as follows:


	As of December 31, 2022				As of December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
	(in millions)
Amortized:
Customer relationships	$	484.5	$	157.6	$	503.4	$	132.9
Existing technology	463.7		71.3		464.9		37.3
Trademarks	64.8		24.0		63.9		19.5
Other	36.4		27.3		36.9		17.9
	1,049.4		280.2		1,069.1		207.6
Indefinite-Lived:
Trademarks	30.6		—		32.7		—
Total	$	1,080.0	$	280.2	$	1,101.8	$	207.6

Amortization expense for the years ended December 31, 2022, 2021 and 2020 was $76.8 million, $44.3 million and $35.6 million, respectively.

The estimated amortization expense for definite-lived (amortized) intangible assets for the next five years is as follows (in millions):


2023	$	69.7
2024	$	69.6
2025	$	68.6
2026	$	65.1
2027	$	64.5

Leases

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Leases


10.			Leases

We regularly enter into operating leases primarily for real estate, equipment, and vehicles. Operating lease arrangements are generally utilized to secure the use of assets if the terms and conditions of the lease or the nature of the asset makes the lease arrangement more favorable than a purchase. Leases with an initial term of 12 months or less are not recorded on the balance sheet. We have elected an accounting policy to combine lease and non-lease components.

Our building leases have remaining terms up to ten years, some of which contain options to renew up to five years, and some of which contain options to terminate. Some leases contain non-lease components, which may include items such as building common area maintenance, building parking, or general service and maintenance provided for leased assets by the lessor. Our vehicle, equipment, and other leases have remaining lease terms up to four years, some of which contain options to renew or become evergreen leases, with automatic renewing one-month terms, and some of which have options to terminate.

Our right of use assets and liabilities related to operating leases as of December 31, 2022 and December 31, 2021 are as follows:


		As of December 31,
	Balance Sheet Classification	2022		2021
		(in millions)
Right-of-use assets	Other assets	$	45.5	$	51.7

Current liability	Accrued expenses	$	9.2	$	9.5
Long-term liability	Other liabilities	38.1		43.9
Total liability		$	47.3	$	53.4

Approximately 98% of the dollar value of our operating lease assets and liabilities arise from real estate leases and approximately 2% arise from equipment and vehicle leases as of December 31, 2022. As of December 31, 2021, approximately

94% of the dollar value of our operating lease assets and liabilities arise from real estate leases and approximately 6% arise from equipment and vehicle leases.

We entered into additional operating leases, including leases acquired through business acquisitions, and renewed existing leases that resulted in new right-of-use assets totaling $5.7 million and $30.0 million for the years ended December 31, 2022 and December 31, 2021, respectively.

Most of our leases do not provide an implicit rate for calculating the right of use assets and corresponding lease liabilities. Accordingly, we determine the interest rate that we would have to pay to borrow on a collateralized basis over a similar term and amount equal to the lease payments in similar economic environments.

Our lease costs and cash flows for the years ended December 31, 2022 and December 31, 2021 were as follows:


	Year ended
	2022		2021
	(in millions)
Lease costs:
Operating lease costs	$	11.0	$	7.7
Short-term and variable lease costs	$	0.2	$	0.2

Cash flows:
Operating cash flows from operating leases	$	10.7	$	7.5

Our weighted average remaining lease term and discount rates at December 31, 2022 and December 31, 2021 were as follows:


	December 31, 2022		December 31, 2021
Weighted average remaining lease term (in years)	6.6		7.2
Weighted average discount rate	3.5	%	3.4	%

A maturity analysis of undiscounted operating lease liabilities is shown in the table below:


	Operating Lease Payments
	(in millions)
2023	$	10.7
2024	9.4
2025	7.4
2026	6.5
2027	5.1
Thereafter	13.9
Total lease payments	53.0
Less: interest	(5.7)
Present value of lease liabilities	$	47.3

The operating lease payments listed in the table above include all current leases. The payments also include all renewal periods that we are reasonably certain to exercise.

We rarely enter into finance leases or act as a lessor. Since finance lease amounts, lessor details, and finance lease related costs are not significant to our consolidated financial position or results of operations, additional disclosures regarding finance leases are not presented.

Accrued Expenses

12 Months Ended

Dec. 31, 2022

Payables and Accruals [Abstract]

Accrued Expenses


11.			Accrued Expenses


	As of December 31,
	2022		2021
	(in millions)
Salaries, wages and employee benefits	$	51.6	$	50.5
Interest	4.4		4.9
Environmental	10.4		11.0

Income taxes	10.7		9.3
Taxes other than income	4.6		7.0
Operating lease liability	9.2		9.5
Other	29.3		24.3
	$	120.2	$	116.5

Debt

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Debt


12.			Debt


	As of December 31,
	2022		2021
	(in millions)
Senior notes	$	347.2	$	346.5
Revolving credit facility	—		175.0
Term loan facilities	442.6		454.6
Other notes payable	0.9		0.5
	790.7		976.6
Less current maturities of long-term debt	15.6		12.7
	$	775.1	$	963.9

Short-term debt	$	—	$	149.3

Senior Secured Credit Facilities

On December 17, 2021, we entered into a Third Amended and Restated Credit Agreement (the “Amended Credit Agreement”) among the Company and EnPro Holdings, as borrowers, certain foreign subsidiaries of the Company from time to time party thereto, as designated borrowers, the guarantors party thereto, the lenders party thereto and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer. The Amended Credit Agreement amends, restates and replaces the Second Amended and Restated Credit Agreement dated as of June 28, 2018, as amended, among the Company and EnPro Holdings as borrowers, the guarantors party thereto, the lenders party thereto and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer.

The Amended Credit Agreement provides for credit facilities in the initial aggregate principal amount of $1,007.5 million, consisting of a five-year, senior secured revolving credit facility of $400.0 million (the “Revolving Credit Facility”), a $142.5 million senior secured term loan facility in replacement of the our existing senior secured term loan facility, maturing September 25, 2024 (the “Term Loan A-1 Facility”), a five-year, senior secured term loan facility of $315.0 million (the “Term Loan A-2 Facility”) and a 364-day, senior secured term loan facility of $150.0 million (the “364-Day Facility” and together with the Revolving Credit Facility, the Term Loan A-1 Facility and the Term Loan A-2 Facility, the “Facilities”). The Amended Credit Agreement also provides that we may seek incremental term loans and/or additional revolving credit commitments in an amount equal to the greater of $275.0 million and 100% of consolidated EBITDA for the most recently ended four-quarter period for which the we have reported financial results, plus additional amounts based on a consolidated senior secured leverage ratio. The Amended Credit Agreement became effective on December 17, 2021.

Borrowings under the 364-Day Facility bore interest at an annual rate of LIBOR plus 1.50% or base rate plus 0.50%. Initially, borrowings under the Facilities (other than the 364-Day Facility) bore interest at an annual rate of LIBOR plus 1.75% or base rate plus 0.75%, although these interest rates were subject to incremental increase or decrease based on a consolidated total net leverage ratio. On November 8, 2022, we entered into a First Amendment to the Amended Credit Agreement, which replaced the LIBOR-based interest rate option with an option based on Term SOFR ("Secured Overnight Financing Rate") plus

(i) a credit spread adjustment of 0.10% and (ii) 1.75%, again subject to incremental increase or decrease based on a consolidated total net leverage ratio. In addition, a commitment fee accrues with respect to the unused amount of the Revolving Credit Facility at an annual rate of 0.225%, which rate is also subject to incremental increase or decrease based on a consolidated total net leverage ratio.

The Term Loan A-1 Facility amortizes on a quarterly basis in an annual amount equal to 2.50% of the original principal amount of the Term Loan A-1 Facility ($150.0 million) in year one after the closing, 5.00% of such original principal amount in year two and 1.25% of such original principal amount in each of the first three quarters of year three, with the remaining outstanding principal amount payable at maturity. The Term Loan A-2 Facility amortizes on a quarterly basis in an annual amount equal to 2.5% of the original principal amount of the Term Loan A-2 Facility in each of years one through three, 5.0% of such original principal amount in year four and 1.25% of such original principal amount in each of the first three quarters of year five, with the remaining outstanding principal amount payable at maturity. The 364-Day Facility did not amortize and was repaid in full in the quarter ended September 30, 2022. The Facilities are subject to prepayment with the net cash proceeds of certain asset sales, casualty or condemnation events and non-permitted debt issuances.

The Company and EnPro Holdings are the permitted borrowers under the Facilities. The Company may also from time to time designate any of its wholly owned foreign subsidiaries as a borrower under the Revolving Credit Facility. Each of the Company’s domestic subsidiaries (other than any subsidiaries that may be designated as “unrestricted” by the Company from time to time, and inactive subsidiaries) is required to guarantee the obligations of the borrowers under the Facilities, and each of the Company’s existing domestic subsidiaries (other than inactive subsidiaries) has entered into the Amended Credit Agreement to provide such a guarantee.

Borrowings under the Facilities are secured by a first-priority pledge of certain assets. The Amended Credit Agreement contains certain financial covenants and required financial ratios including a maximum consolidated total net leverage and a minimum consolidated interest coverage as defined in the Amended Credit Agreement. We were in compliance with all covenants of the Amended Credit Agreement as of December 31, 2022.

The borrowing availability under our Revolving Credit Facility at December 31, 2022 was $389.2 million after giving consideration to $10.8 million of outstanding letters of credit and no outstanding borrowings. The balance of our outstanding Term Loan A-1 Facility, Term Loan A-2 Facility and 364-Day Facility at December 31, 2022 was $137.0 million and $307.1 million, respectively. The 364-Day Facility had no outstanding balance at December 31, 2022.

Senior Notes

On October 17, 2018, we completed the offering of $350.0 million aggregate principal amount of 5.75% Senior Notes due 2026 (the "Senior Notes") and applied the net proceeds of that offering, together with borrowings under the Revolving Credit Facility, to redeem on October 31, 2018 the full $450.0 million aggregate principal amount of the outstanding 5.875% Senior Notes due 2022 (the "Old Notes").

The Senior Notes were issued to investors at 100% of the principal amount thereof. The Senior Notes are unsecured, unsubordinated obligations of EnPro and mature on October 15, 2026. Interest on the Senior Notes accrues at a rate of 5.75% per annum and is payable semi-annually in cash in arrears on April 15 and October 15 of each year. The Senior Notes are required to be guaranteed on a senior unsecured basis by each of EnPro’s existing and future direct and indirect domestic subsidiaries that is a borrower under, or guarantees, our indebtedness under the Revolving Credit Facility or guarantees any other Capital Markets Indebtedness (as defined in the indenture governing the Senior Notes) of EnPro or any of the guarantors.

Commencing on October 15, 2021, we may, on any one or more occasions, redeem all or a part of the Senior Notes at specified redemption prices plus accrued and unpaid interest. In addition, we may redeem a portion of the aggregate principal amount of the Senior Notes before October 15, 2021 with the net cash proceeds from certain equity offerings at a specified redemption price plus accrued and unpaid interest, if any, to, but not including, the redemption date. Prior to October 15, 2021, we could redeem some or all of the Senior Notes at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to, but not including, the redemption date, plus a “make whole” premium.

The indenture governing the Senior Notes includes covenants that restrict our ability to engage in certain activities, including incurring additional indebtedness, paying dividends and repurchasing shares of our common stock, subject in each case to specified exceptions and qualifications set forth in the indenture. The indenture further requires us to apply the net cash proceeds of certain asset sales not reinvested in acquisitions, or used to repay or otherwise reduce specified indebtedness within a specified period, in the event of the net proceeds exceeding a specified amount, to offer to repurchase the Senior Notes at a price equal to 100% of the principal amount thereof plus accrued and unpaid interest.

Scheduled Principal Payments

Future principal payments on long-term debt are as follows:


	(in millions)
2023	$	15.6
2024	137.5
2025	15.9
2026	625.9
2027	0.1
Thereafter	0.1
	$	795.1

The payments for long-term debt shown in the table above reflect the contractual principal amount for the Senior Notes and Term Loan A-2 Facility. In the Consolidated Balance Sheet as of December 31, 2022, these amounts are shown net of unamortized debt discounts aggregating $4.4 million pursuant to applicable accounting rules.

Debt Issuance Costs

During 2021, we capitalized $4.7 million of debt issuance costs in connection with the Amended Credit Agreement.

Derivatives and Hedging

12 Months Ended

Dec. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging


13.			Derivatives and Hedging

We are exposed to foreign currency risks that arise from normal business operations. These risks include the translation of local currency balances on our foreign subsidiaries’ balance sheets, intercompany loans with foreign subsidiaries and transactions denominated in foreign currencies. We strive to control our exposure to these risks through our normal operating activities and, where appropriate, through derivative instruments. We periodically enter into contracts to hedge forecasted transactions that are denominated in foreign currencies. In December 2022, we entered into a forward contract to hedge a 95 million Euro exposure on an intercompany note agreement related to proceeds from the GGB sale allocated to foreign subsidiaries. We expect this position to be resolved in 2023. The notional amount of foreign exchange contracts was $103.3 million and $3.3 million at December 31, 2022 and 2021, respectively. All foreign exchange contracts outstanding at December 31, 2022 expired in January of 2023.

The notional amounts of all of our foreign exchange contracts were recorded at their fair market value as of December 31, 2022 with changes in market value recorded in income. The earnings impact of any foreign exchange contract that is specifically related to the purchase of inventory is recorded in cost of sales and the changes in market value of all other contracts are recorded in selling, general and administrative expense in the Consolidated Statements of Operations. The balances of foreign exchange derivative assets are recorded in other current assets and the balances of foreign exchange derivative liabilities are recorded in accrued expenses in the Consolidated Balance Sheets.

In September 2018, we entered into cross currency swap agreements (the "Swap") with a notional amount of $200.0 million to manage foreign currency risk by effectively converting a portion of the interest payments related to our fixed-rate USD-denominated Old Notes, including the semi-annual interest payments thereunder, to interest payments on fixed-rate Euro-denominated debt of 172.8 million EUR with a weighted average interest rate of 2.8%, with interest payment dates of March 15 and September 15 of each year.

The Swap matured on September 15, 2022. At settlement, we received $30.8 million in cash, of which $27.4 million represented the fair value of the contracts as of the settlement date and $3.4 million represented interest receivable. Unrealized gains totaling $20.8 million, net of tax, as of the maturity date are included in accumulated other comprehensive income.

In May 2019, we entered into additional cross currency swap agreements (the "Additional Swap") with a notional amount of $100.0 million to manage an increased portion of our foreign currency risk by effectively converting a portion of the interest payments related to our fixed-rate USD-denominated Senior Notes, including the semi-annual interest payments thereunder, to interest payments on the fixed-rate Euro-denominated debt of 89.6 million EUR with a weighted average interest rate of 3.5%, with interest payment dates of April 15 and October 15 of each year. The Additional Swap agreement matures on October 15, 2026.

During the term of the Additional Swap agreement, we will receive semi-annual payments from the counterparties due to the difference between the interest rate on the Senior Notes and the interest rate on the Euro debt underlying the Additional Swap. There was no principal exchange at the inception of the arrangement, and there will be no exchange at maturity. At maturity (or earlier at our option), we and the counterparty will settle the Additional Swap agreement at its fair value in cash based on the aggregate notional amount and the then-applicable currency exchange rate compared to the exchange rate at the time the Additional Swap agreement was entered into.

We have designated the Additional Swap as a qualifying hedging instruments and are accounting for it as a net investment hedge. At December 31, 2022, the fair value of the Additional Swap equaled $8.5 million and was recorded within our other (non-current) assets on the Consolidated Balance Sheet. The gains and losses resulting from fair value adjustment to the Additional Swap agreement, excluding interest accruals related to the above receipts, are recorded in accumulated other comprehensive income within our cumulative foreign currency translation adjustment, as the Additional Swap is effective in hedging the designated risk. Cash flows related to the Additional Swap are included in operating activities in the Consolidated Statements of Cash Flows, aside from the ultimate settlement at maturity with the counterparty, which will be included in investing activities.

Fair Value Measurements

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurements


14.			Fair Value Measurements

Assets and liabilities measured at fair value on a recurring basis are summarized as follows:


	Fair Value Measurements as of
	December 31, 2022		December 31, 2021
	(in millions)
Assets





Foreign currency derivatives	$	8.5	$	8.7
Deferred compensation assets	9.8		10.9
	$	18.3	$	19.6
Liabilities
Deferred compensation liabilities	$	10.3	$	11.4

Our deferred compensation assets and liabilities are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices. Our foreign currency derivatives are classified as Level 2 as their value is calculated based upon observable inputs including market USD/Euro exchange rates and market interest rates.

The carrying values of our significant financial instruments reflected in the Consolidated Balance Sheets approximate their respective fair values, except for the following:


	December 31, 2022				December 31, 2021
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in millions)
Long-term debt	$	790.7	$	788.8	$	976.6	$	998.3

The fair values for long-term debt are based on quoted market prices for identical liabilities, but this would be considered a Level 2 computation because the market is not active.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Pensions and Postretirement Benefits

12 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Pensions and Postretirement Benefits


15.			Pensions and Postretirement Benefits

We have non-contributory defined benefit pension plans covering eligible employees in the United States, Mexico, Taiwan and several European countries. Salaried employees’ benefit payments are generally determined using a formula that is based on an employee’s compensation and length of service. We closed our defined benefit pension plan for new salaried employees in the United States who joined the Company after January 1, 2006, and, effective January 1, 2007, benefits were frozen for all salaried employees who were not age 40 or older as of December 31, 2006 and benefits for all remaining eligible salaried employees were frozen as of January 1, 2021. Hourly employees’ benefit payments are generally determined using stated amounts for each year of service.

Our employees also participate in voluntary contributory retirement savings plans for salaried and hourly employees maintained by us. Under these plans, eligible employees can receive matching contributions up to the first 6% of their eligible earnings. Effective January 1, 2007, those employees whose defined benefit pension plan benefits were frozen receive an

additional 2% company contribution each year. Beginning on August 1, 2016, this additional contribution ceased being provided to future hires at the company, but was retained for those employees already receiving it. We recorded $8.6 million, $8.3 million and $7.5 million in expenses in 2022, 2021 and 2020, respectively, for matching contributions under these plans.

Our general funding policy for qualified defined benefit pension plans historically has been to contribute amounts that are at least sufficient to satisfy regulatory funding standards. No contributions were made in 2022 or 2021 and in 2020, we contributed $4.0 million, in cash to our U.S. pension plans. The contribution was made in 2020 in order to meet a funding level sufficient to avoid variable fees from the PBGC on the underfunded portion of our pension liability. We do not anticipate making contributions in 2023 to our U.S. defined benefit pension plans and we expect to make total contributions of approximately $0.8 million in 2023 to the foreign pension plans.

The projected benefit obligation and fair value of plan assets for the defined benefit pension plans with projected benefit obligations in excess of plan assets were $6.1 million and $0.2 million at December 31, 2022, and $13.9 million and $1.0 million at December 31, 2021, respectively. The accumulated benefit obligation and fair value of plan assets for the defined benefit pension plans with accumulated benefit obligations in excess of plan assets were $4.3 million and $0.2 million at December 31, 2022, and $10.1 million and $1.0 million at December 31, 2021, respectively.

We provide, through non-qualified plans, supplemental pension benefits to a limited number of employees. Certain of our subsidiaries also sponsor unfunded postretirement plans that provide certain health-care and life insurance benefits to eligible employees. The health-care plans are contributory, with retiree contributions adjusted periodically, and contain other cost-sharing features, such as deductibles and coinsurance. The life insurance plans are generally noncontributory. The amounts included in “Other Benefits” in the following tables include the non-qualified plans and the other postretirement plans discussed above.

The following table sets forth the changes in projected benefit obligations and plan assets of our defined benefit pension and other non-qualified and postretirement plans as of and for the years ended December 31, 2022 and 2021.


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
	(in millions)
Change in Projected Benefit Obligations
Projected benefit obligations at beginning of year	$	335.7	$	350.7	$	3.1	$	3.8
Service cost	1.2		1.5		—		—
Interest cost	9.8		9.0		—		0.1
Actuarial loss (gain)	(77.6)		(10.7)		(0.4)		(0.6)

Settlements	—		—		—		(0.1)
Benefits paid	(15.9)		(14.4)		(0.3)		(0.3)
Curtailments	(1.0)		—		—		—
Plan combination (acquisitions/divestitures)	(3.9)		—		—		—
Other	(0.7)		(0.4)		—		0.2
Projected benefit obligations at end of year	247.6		335.7		2.4		3.1



Change in Plan Assets	2022	2021
Fair value of plan assets at beginning of year	351.4	353.4
Actual return on plan assets	(81.5)	12.2

Benefits paid	(15.9)	(14.4)

Company contributions	0.2	0.3
Plan combination (acquisitions/divestitures)	(0.8)	—
Other	(0.1)	(0.1)
Fair value of plan assets at end of year	253.3	351.4


Funded Status at End of Year			$	5.7					$	15.7					$	(2.4)					$	(3.1)


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
	(in millions)
Amounts Recognized in the Consolidated Balance Sheets
Long-term assets	$	11.7	$	28.6	$	—	$	—
Current liabilities	(0.5)		(0.9)		(0.1)		(0.1)

Long-term liabilities	(5.5)		(12.0)		(2.3)		(3.0)
	$	5.7	$	15.7	$	(2.4)	$	(3.1)

Pre-tax charges recognized in accumulated other comprehensive income (loss) as of December 31, 2022 and 2021 consist of:


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
	(in millions)
Net actuarial (gain) loss	$	59.6	$	41.7	$	(0.9)	$	(0.4)
Prior service cost	0.6		0.9		—		—
	$	60.2	$	42.6	$	(0.9)	$	(0.4)

The accumulated benefit obligation for all defined benefit pension plans was $245.9 million and $331.9 million at December 31, 2022 and 2021, respectively. The accumulated postretirement benefit obligation for all other postretirement benefit plans was $2.4 million and $3.1 million at December 31, 2022 and 2021, respectively.

The following table sets forth the components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for our defined benefit pension and other non-qualified and postretirement plans for the years ended December 31, 2022, 2021 and 2020.


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
	(in millions)
Net Periodic Benefit Cost
Service cost	$	1.2	$	1.5	$	4.5	$	—	$	—	$	—
Interest cost	9.8		9.0		10.4		—		0.1		0.1
Expected return on plan assets	(13.3)		(18.3)		(18.9)		—		—		—
Amortization of prior service cost	0.2		0.1		0.1		—		—		—
Amortization of net loss	0.5		0.7		5.2		0.1		0.1		0.2
Settlements	—		—		—		—		—		(1.1)
Curtailments	(1.0)		—		0.3		—		—		—
Net periodic benefit cost	(2.6)		(7.0)		1.6		0.1		0.2		(0.8)


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
	(in millions)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	17.2		(4.7)		(7.8)		(0.4)		(0.5)		0.3
Prior service cost	—		0.4		(0.3)		—		—		—
Amortization of net loss	(0.5)		(0.7)		(5.2)		(0.1)		(0.1)		(0.2)
Amortization of prior service cost	(0.2)		(0.1)		(0.1)		—		—		—
Settlements	—		—		—		—		—		1.1
Curtailments	1.0		—		(0.3)		—		—		—
Total recognized in other comprehensive income	17.5		(5.1)		(13.7)		(0.5)		(0.6)		1.2
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	$	14.9	$	(12.1)	$	(12.1)	$	(0.4)	$	(0.4)	$	0.4


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31
Discount rate	5.625	%	3.000	%	2.625	%	5.625	%	3.000	%	2.625	%
Rate of compensation increase	N/A		N/A		3.0	%	N/A		N/A		4.0	%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended December 31
Discount rate	3.000	%	2.625	%	3.375	%	3.000	%	2.625	%	3.375	%
Expected long-term return on plan assets	3.9	%	5.3	%	6.0	%	—		—		—
Rate of compensation increase	N/A		3.0	%	3.0	%	4.0	%	4.0	%	4.0	%

The discount rate reflects the current rate at which the pension liabilities could be effectively settled at the end of the year. The discount rate was determined with a model that uses a theoretical portfolio of high quality corporate bonds specifically selected to produce cash flows closely related to how we would settle our retirement obligations. This produced a discount rate of 5.6% at December 31, 2022. As of the date of these financial statements, there are no known or anticipated changes in our discount rate assumption that will impact our pension expense in 2023. A 25 basis point decrease (increase) in our discount rate, holding constant our expected long-term return on plan assets and other assumptions, would decrease (increase) pension expense by approximately $0.1 million per year.

The overall expected long-term rate of return on assets was determined based upon weighted-average historical returns over an extended period of time for the asset classes in which the plans invest according to our current investment policy.

We use the Pri-2012 base mortality table with the MP-2021 projection scale to value our domestic pension liabilities.


Assumed Health Care Cost Trend Rates at December 31	2022		2021
Health care cost trend rate assumed for next year	7.0	%	7.0	%
Rate to which the cost trend rate is assumed to decline (the ultimate rate)	4.5	%	4.5	%
Year that the rate reaches the ultimate trend rate	2028		2027

Plan Assets

The asset allocation for pension plans at the end of 2022 and 2021, and the target allocation for 2023, by asset category are as follows:


	Target Allocation		Plan Assets at December 31,
	2023		2022		2021
Asset Category
Equity securities	20	%	22	%	22	%
Fixed income	80	%	78	%	78	%
	100	%	100	%	100	%

Our investment goal is to maximize the return on assets, over the long term, by investing in equities and fixed income investments while diversifying investments within each asset class to reduce the impact of losses in individual securities. Equity investments include a mix of U.S. large capitalization equities, U.S. small capitalization equities and non-U.S. equities. Fixed income investments include a mix of treasury obligations and high-quality money market instruments. The asset allocation policy is reviewed and any significant variation from the target asset allocation mix is rebalanced periodically. The plans have no direct investments in EnPro common stock.

The plans invest exclusively in mutual funds whose holdings are marketable securities traded on recognized markets and, as a result, would be considered Level 1 assets. The investment portfolios of the various funds at December 31, 2022 and 2021 are summarized as follows:


	2022		2021
	(in millions)
Mutual funds – U.S. equity	$	32.6	$	46.2
Mutual funds – international equity	22.3		30.6
Mutual funds - fixed income treasury and money market	197.2		273.5

Cash equivalents	1.2		1.1
	$	253.3	$	351.4

Estimated Future Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid in the following calendar years:


	Pension Benefits		Other Benefits
	(in millions)
2023	$	16.3	$	0.1
2024	16.8		1.4
2025	17.9		0.1
2026	18.0		0.1
2027	18.4		0.1
Years 2027 – 2031	97.8		0.5

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section S99
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (o)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (p)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI https://asc.fasb.org/topic&trid=2235017

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(03)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (q)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (r)(1)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iii)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (r)(2)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

+ Details

Shareholders' Equity

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Stockholders' Equity


16.			Shareholders' Equity

We have a policy under which we intend to declare regular quarterly cash dividends on our common stock, as determined by our board of directors, after taking into account our cash flows, earnings, financial position and other relevant matters. In accordance with this policy, total dividend payments of $23.4 million, $22.4 million, and $21.7 million were made during the years ended December 31, 2022, 2021, and 2020, respectively.

In February 2023, our board of directors declared a cash dividend of $0.29 per share, commencing with the dividend to be paid on March 15, 2023 to all shareholders of record as of March 1, 2023.

In October 2018, our board of directors authorized a two-year program for expenditures of up to $50.0 million of our outstanding common shares. Prior to the expiration of this authorization in October 2020, we repurchased 0.1 million shares for $5.3 million during 2020.

In October 2022, our board of directors authorized a new two-year program of up to $50.0 million for the repurchase of our outstanding common shares through October 2024. We have not made any repurchases under the new authorization. The shares for all repurchase plans are retired upon purchase.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI https://asc.fasb.org/topic&trid=2208762

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 16
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496180-112644

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126731327&loc=SL126733271-114008

+ Details

Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)


17.			Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive Income (loss) by component (after tax) are as follows:


(in millions)	Unrealized Translation Adjustments		Pension and Other Postretirement Plans		Total
Balance at December 31, 2019	9.8		(46.2)		(36.4)


Other comprehensive income before reclassifications	21.5		6.0		27.5
Amounts reclassified from accumulated other comprehensive loss	3.4		3.6		7.0
Net current-period other comprehensive income	24.9		9.6		34.5
Less: other comprehensive income attributable to redeemable non-controlling interests	3.0		—		3.0
Net current-period other comprehensive income attributable to EnPro Industries, Inc.	21.9		9.6		31.5
Balance at December 31, 2020	31.7		(36.6)		(4.9)
Other comprehensive income before reclassifications	2.5		3.8		6.3
Amounts reclassified from accumulated other comprehensive loss	12.9		0.7		13.6
Net current-period other comprehensive income	15.4		4.5		19.9
Less: other comprehensive income attributable to redeemable non-controlling interests	0.4		—		0.4
Net current-period other comprehensive income attributable to EnPro Industries, Inc.	15.0		4.5		19.5
Balance at December 31, 2021	46.7		(32.1)		14.6
Other comprehensive loss before reclassifications	(39.7)		(12.8)		(52.5)
Amounts reclassified from accumulated other comprehensive loss	1.4		(0.2)		1.2
Net current-period other comprehensive income	(38.3)		(13.0)		(51.3)
Less: other comprehensive income attributable to redeemable non-controlling interests	(3.4)		—		(3.4)
Net current-period other comprehensive income (loss) attributable to EnPro Industries, Inc.	(34.9)		(13.0)		(47.9)
Balance at December 31, 2022	$	11.8	$	(45.1)	$	(33.3)

Reclassifications out of accumulated other comprehensive income (loss) are as follows:


Details about Accumulated Other Comprehensive Loss Components	Amount Reclassified from Accumulated Other Comprehensive Loss						Affected Statement of Operations Caption
	Years Ended December 31,
	2022		2021		2020
	(in millions)
Pension and other postretirement plans adjustments:
Amortization of actuarial losses	$	0.6	$	0.8	$	5.4	(1)
Amortization of prior service costs	0.2		0.1		0.1		(1)
Curtailments	(1.0)		—		0.3		(1)
Settlements	—		—		(1.1)		(1)
Total before tax	(0.2)		0.9		4.7		Income (loss) from continuing operations before income taxes
Tax benefit	—		(0.2)		(1.1)		Income tax expense
Net of tax	$	(0.2)	$	0.7	$	3.6	Income (loss) from continuing operations




Release of unrealized currency translation adjustment upon sale of investment in foreign entity, net of tax	$	1.4	$	12.9	$	3.4	Other (non-operating) income (expense); Income from discontinued operations, including gain on sale, net of taxes

(1) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost. Since these are components of net periodic pension cost other than service cost, the affected Consolidated Statement of Operations caption is other (non-operating) expense. (See Note 15, "Pensions and Postretirement Benefits" for additional details).

Equity Compensation Plan

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Equity Compensation Plan


18.			Equity Compensation Plan

We have equity compensation plans (the “Plans”) that provide for the delivery of shares pursuant to various market and performance-based incentive awards. As of December 31, 2022, there are 1.4 million shares available for future awards. Our policy is to issue new shares to satisfy share delivery obligations for awards made under the Plans.

The Plans permit awards of restricted share units to be granted to executives and other key employees. Generally, share units awarded prior to February 2020 vest in three years, while those awarded thereafter vest in equal annual increments over three years. Compensation expense related to the restricted share units is based upon the market price of the underlying common stock as of the date of the grant and is amortized over the applicable vesting period using the straight-line method. As of December 31, 2022, there was $6.8 million of unrecognized compensation cost related to restricted share units expected to be recognized over a weighted-average remaining amortization period of 1.8 years.

Under the terms of the Plans, performance share awards were granted to executives and other key employees during 2022, 2021 and 2020. Each grant will vest if EnPro achieves specific financial objectives at the end of each three-year performance period. Additional amounts under these awards are paid out if objectives are exceeded, but some or all the awards may be forfeited if objectives are not met.

Performance shares earned at the end of a performance period, if any, for shares issued prior to 2020 were paid in actual shares of our common stock, less the number of shares equal in value to applicable withholding taxes if the employee chooses. Performance shares earned at the end of a performance period, if any, for awards granted in 2022, 2021, and 2020, will be paid in cash, less applicable withholding taxes if the employee chooses. Awards are forfeited if a grantee terminates employment, during the performance period, except in the case of retirement.

Compensation expense related to performance share awards payable in stock granted prior to 2020 was computed using the fair value of the awards at the date of grant. Potential shares to be issued for performance share awards granted prior to 2020 were subject to a market condition based on the performance of our stock, measured based upon a calculation of total shareholder return, compared to a group of peer companies The fair value of these awards was determined using a Monte Carlo

simulation methodology. Compensation expense for these awards was computed based upon this grant date fair value using the straight-line method over the applicable performance period.

Compensation expense related to the performance share awards payable in cash granted in 2022, 2021, and 2020 is computed using the fair value of the awards as of December 31, 2022. The fair value of these awards was determined using a Monte Carlo simulation methodology. Compensation issued for performance share awards is subject to a market conditions based on the performance of our stock, measured based upon a calculation of total shareholder return, compared to a group of peer companies. Compensation expense for these awards is computed based upon the calculated fair value at the end of the period using the straight-line method over the applicable performance period. The shares will be remeasured and compensation expense will be adjusted based on the current market-based estimate.

The Monte Carlo simulation model utilizes multiple input variables that determine the probability of satisfying the market condition stipulated in the award and calculates the fair value of each award. We issued performance share awards to eligible participants on February 15, 2022 and February 16, 2021,. We used the following assumptions in determining the fair value of these awards:


	Expected stock price volatility		Annual expected dividend yield		Risk free interest rate
Shares granted February 15, 2022
EnPro Industries, Inc.	33.1	%	1.01	%	4.26	%
S&P 600 Capital Goods Index	39.43	%	n/a		4.26	%
Shares granted February 16, 2021
EnPro Industries, Inc.	47.32	%	1.40	%	0.22	%
S&P 600 Capital Goods Index	50.86	%	n/a		0.22	%

The expected volatility assumption for us and each member of the peer group is based on each entity’s historical stock price volatility over a period equal to the length from the valuation date to the end of the performance cycle. The annual expected dividend yield is based on annual expected dividend payments and the stock price on the date of grant. The risk free rate equals the yield, as of the valuation date, on zero-coupon U.S. Treasury STRIPS that have a remaining term equal to the length of the remaining performance cycle.

As of December 31, 2022 there was $6.2 million of unrecognized compensation cost related to nonvested performance share awards to be paid in cash and is expected to be recognized over a weighted-average vesting period of 1.5 years. All performance share awards payable in stock had vested and been issued prior to calendar 2022.

A summary of award activity under the Plans is as follows:


	Restricted Share Units
	Shares	Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2021	183,158	70.07
Granted	61,330	107.94
Vested	(79,357)	69.51
Forfeited	(24,634)	74.29

Shares settled for cash	(15,900)	67.90
Nonvested at December 31, 2022	124,597	$	88.52

The maximum potential number of shares to be issued at December 31, 2022 is represented by the restricted share units nonvested balance at December 31, 2022. We account for forfeitures when they occur as opposed to estimating the number of awards that are expected to vest as of the grant date.

During the first quarter of calendar 2020, 2021 and 2022, the Company granted Performance Shares to certain key employees which are payable in cash after a three-year vesting period. Actual payments to be made to participating employees will be based on an initial target amount, which is adjusted based on the relative three-year performance of Enpro’s share price versus a set of peer companies. Expense related to each grant is recognized on a straight-line basis utilizing the best current estimate of the grant value at maturity. Expense recognized for calendar 2022, 2021 and 2020 was $7.8 million, $6.9 million and $1.7 million, respectively. The total liability related to this Performance Share cash plan was $15.6 million at December 31, 2022, of which $7.5 million is classified as current.

Non-qualified and incentive stock options were granted in 2020, 2021, and 2022. No stock option has a term exceeding 10 years from the date of grant. All stock options were granted at not less than 100% of fair market value (as defined) on the date of grant. As of December 31, 2022, there was $2.4 million of unrecognized compensation cost related to stock options.

The following table provides certain information with respect to stock options as of December 31, 2022:


Range of Exercise Price	Stock Options Outstanding	Stock Options Exercisable	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
Under $80.00	50,787	31,892	$	53.78	7.16
Over $80.00 and under $90.00	69,510	21,689	80.73		8.18
Over $90.00	64,633	3,418	106.47		9.11
Total	184,930	56,999	$	82.32	8.23

We determine the fair value of stock options using the Black-Scholes option pricing formula. Key inputs into this formula include expected term, expected volatility, expected dividend yield, and the risk-free interest rate. We use the closing stock price on the grant date for determining the fair value. This fair value is amortized on a straight line basis over the vesting period. All options issued vest in equal annual increments over three years with the exception of options granted on November 26, 2021 that vest equally at the end of one quarter years, one and one quarter years, and two and one quarter years.

The expected term represents the period that our stock options are expected to be outstanding, and is determined based on historical experience of similar awards, given the contractual terms of the awards, vesting schedules, and expectations of future employee behavior. The fair value of stock options reflects a volatility factor calculated using historical market data for EnPro's common stock. The dividend assumption is based on our current expectations for our dividend policy. We base the risk-free interest rate on the yield to maturity at the time of the stock option grant on zero-coupon U.S. government bonds having a remaining life equal to the option's expected life. When estimating forfeitures, we consider voluntary termination behaviors as well as analysis of actual option forfeitures.

The following assumptions were used to estimate the indicated fair value of the 2022 option awards:


	Grant Date
	February 15, 2022			February 24, 2022
Fair-value at grant date (per share)	$	38.86		$	39.07

Assumptions:
Average expected term	6 years			6 years
Expected volatility	39.85		%	39.88		%
Risk-free interest rate	1.99		%	1.89		%
Expected dividend yield	1.06		%	1.05		%

The following assumptions were used to estimate the indicated fair value of the 2021 option awards:


	Grant Date
	February 25, 2021			May 4, 2021			May 17, 2021			August 5, 2021			November 26, 2021
Fair-value at grant date (per share)	$	27.46		$	30.32		$	33.53		$	29.78		$	36.53

Assumptions:
Average expected term	6 years			6 years			6 years			6 years			5.6 years
Expected volatility	40.29		%	40.37		%	40.46		%	40.65		%	39.51		%
Risk-free interest rate	1.02		%	1.05		%	1.07		%	0.87		%	0.42		%
Expected dividend yield	1.35		%	1.24		%	1.14		%	1.26		%	1.74		%

The following assumptions were used to estimate the indicated fair value of the 2020 option awards:


	Grant Date
	February 27, 2020			August 27, 2020
Fair-value at grant date (per share)	$	13.64		$	18.67

Assumptions:
Average expected term	6 years			6 years
Expected volatility	31.53		%	39.51		%
Risk-free interest rate	1.17		%	0.42		%
Expected dividend yield	1.93		%	1.74		%

A summary of option activity under the Plans as of December 31, 2022, and changes during the year then ended, is presented below:


	Stock Options Outstanding	Weighted Average Exercise Price
Balance at December 31, 2021	155,036	$	70.46
Granted	57,018	106.54
Exercised	(17,648)	59.25
Forfeited	(9,476)	76.91
Balance at December 31, 2022	184,930	$	82.32

The year-end intrinsic value related to stock options is presented below:


	December 31,
(in millions)	2022		2021		2020
Options outstanding	$	4.9	$	6.1	$	4.0
Options exercisable	$	2.4	$	1.3	$	0.6

We recognized the following equity-based employee compensation expenses and benefits related to our Plan activity:


	Years Ended December 31,
(in millions)	2022		2021		2020
Compensation expense	$	6.0	$	5.0	$	5.4
Related income tax benefit	$	1.6	$	1.4	$	1.4

Each non-employee director received an annual grant of common stock (or, at the directors election, phantom shares) equal in value to $110,000 in the years ended December 31, 2022, 2021 and 2020. With respect to certain phantom shares awarded in prior years, we will pay each non-employee director in cash the fair market value of the director's phantom shares upon termination of service as a member of the board of directors. The remaining phantom shares granted will be paid out in the form of one share of our common stock for each phantom share, with the value of any fractional phantom shares paid in cash. Expense recognized in the years ended December 31, 2022, 2021 and 2020 related to these share and phantom share grants was $1.0 million, $1.0 million and $0.9 million, respectively. No cash payments were used to settle phantom shares in 2022, 2021 or 2020.

Business Segment Information

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Business Segment Information


19.			Business Segment Information

We aggregate our operating businesses into two reportable segments. The factors considered in determining our reportable segments are the economic similarity of the businesses, the nature of products sold, or solutions provided, the production processes and the types of customers and distribution methods. Our reportable segments are managed separately based on these differences.

Our Sealing Technologies segment designs and manufactures value-added products and solutions that safeguard a variety of critical environments, including: metallic, non-metallic and composite material gaskets, dynamic seals, compression packing, resilient metal seals, elastomeric seals, custom-engineered mechanical seals for applications in the aerospace industry and other markets, hydraulic components, expansion joints, sanitary gaskets, hoses and fittings for the hygienic process industries, fluid transfer products for the pharmaceutical and biopharmaceutical industries, and heavy-duty commercial vehicle parts used in wheel-end and suspension components that customers rely upon to ensure safety on our roadways. These products are used in a variety of markets, including chemical and petrochemical processing, nuclear energy, food and biopharmaceutical processing, primary metal manufacturing, mining, water and waste treatment, heavy-duty trucking, aerospace, medical, filtration and semiconductor fabrication. In all of these industries, performance and durability of our proprietary products and solutions are vital for the safety and environmental protection of our customers processes. Many of our products and solutions are used in highly demanding applications oftentimes in incredibly harsh environments, e.g., where extreme temperatures, extreme pressures, corrosive environments, strict tolerances, and/or worn equipment create challenges for product performance. Sealing Technologies offers customers widely recognized applied engineering, innovation, process know how and enduring reliability, driving a lasting aftermarket for many of our solutions.

Our Advanced Surface Technologies (AST) segment applies proprietary technologies, processes, and capabilities to deliver a highly differentiated suite of products and solutions for the most challenging applications in high growth markets. The segment’s products and solutions are used in highly demanding environments requiring performance, precision and repeatability, with a low tolerance for failure. The segment’s solutions include cleaning, coating, testing, refurbishment and verification for critical components and assemblies used in state-of-the-art advanced node semiconductor manufacturing equipment. It designs, manufactures and sells specialized optical filters and proprietary thin-film coatings for the most challenging applications in the industrial technology, life sciences, and semiconductor markets and complex front-end wafer processing sub-systems, new and refurbished electrostatic chuck pedestals, and edge-welded metal bellows for the semiconductor equipment industry and for critical applications in the space, aerospace and defense markets. In many instances, AST capabilities drive solutions that enable the maintenance of our customers’ processes through an entire life cycle.

We measure operating performance based on segment earnings before interest, income taxes, depreciation, amortization, and other selected items ("Adjusted Segment EBITDA"), which is segment revenue reduced by operating expenses and other costs identifiable with the segment, excluding acquisition and divestiture expenses, restructuring costs, impairment charges, non-controlling interest compensation, amortization of the fair value adjustment to acquisition date inventory, and depreciation and amortization. Adjusted Segment EBITDA is not defined under GAAP and may not be comparable to similarly-titled measures used by other companies. Corporate expenses include general corporate administrative costs. Expenses not directly attributable to the segments, corporate expenses, net interest expense, gains and losses related to the sale of assets, and income taxes are not included in the computation of Adjusted Segment EBITDA. The accounting policies of the reportable segments are the same as those for EnPro.

Non-controlling interest compensation allocation represents compensation expense associated with a portion of the rollover equity from the acquisitions of LeanTeq and Alluxa being subject to reduction for certain types of employment terminations of the sellers. This expense is recorded in selling, general, and administrative expenses on our Consolidated Statements of Operations and is directly related to the terms of the acquisitions. This expense will continue to be recognized as compensation expense over the term of the put and call options associated with the acquisitions unless certain employment terminations have occurred. In the fourth quarter of 2022, EnPro acquired all of the LeanTeq non-controlling interests.

Segment operating results and other financial data for the years ended December 31, 2022, 2021, and 2020 were as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Sales
Sealing Technologies	$	624.3	$	599.8	$	636.7
Advanced Surface Technologies	476.1		247.3		171.2
	1,100.4		847.1		807.9
Intersegment sales	(1.2)		(6.7)		(7.9)
Total sales	$	1,099.2	$	840.4	$	800.0

Adjusted Segment EBITDA
Sealing Technologies	$	159.1	$	141.9	$	131.5
Advanced Surface Technologies	141.5		73.2		47.1
Total Adjusted Segment EBITDA	$	300.6	$	215.1	$	178.6

Reconciliation of Adjusted Segment EBITDA to income (loss) from continuing operations before income taxes
Income (loss) from continuing operations before income taxes	$	28.3	$	66.0	$	(23.5)
Acquisition and divestiture expenses	0.5		0.4		9.6
Non-controlling interest compensation allocation	(0.6)		5.3		2.9
Amortization of fair value adjustment to acquisition date inventory	13.3		9.9		3.0
Restructuring and impairment expense	1.9		2.4		14.3
Depreciation and amortization expense	102.8		63.5		56.5
Corporate expenses	47.0		64.9		41.4
Interest expense, net	33.9		13.7		14.9
Goodwill impairment	65.2		—		—
Other income (expense), net	8.3		(11.0)		59.5
Adjusted Segment EBITDA	$	300.6	$	215.1	$	178.6


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Net Sales by Geographic Area
United States	$	687.4	$	445.7	$	477.7
Europe	139.7		132.7		117.5
Other foreign	272.1		262.0		204.8
Total	$	1,099.2	$	840.4	$	800.0

Net sales are attributed to countries based on location of the customer.

Due to the diversified nature of our business and the wide array of products that we offer, we sell into a number of end markets. Underlying economic conditions within these markets are a major driver of our segments' sales performance. Below is a summary of our third-party sales by major end market with which we did business for the years ended December 31, 2022, 2021 and 2020:


	Year Ended December 31, 2022
	(in millions)
	Sealing Technologies		Advanced Surface Technologies		Total
Aerospace	$	41.2	$	6.1	$	47.3

Chemical and material processing	77.6		—		77.6
Food and pharmaceutical	70.8		—		70.8
General industrial	162.3		28.4		190.7
Medium-duty/heavy-duty truck	191.2		—		191.2
Oil and gas	21.4		5.2		26.6
Power generation	43.1		0.1		43.2
Semiconductors	6.1		430.9		437.0
Other	9.7		5.1		14.8
Total third-party sales	$	623.4	$	475.8	$	1,099.2


	Year Ended December 31, 2021
	(in millions)
	Sealing Technologies		Advanced Surface Technologies		Total
Aerospace	$	32.1	$	9.8	$	41.9

Chemical and material processing	72.5		—		72.5
Food and pharmaceutical	65.1		—		65.1
General industrial	161.8		25.7		187.5
Medium-duty/heavy-duty truck	174.3		—		174.3
Oil and gas	19.0		4.6		23.6
Power generation	43.6		0.2		43.8
Semiconductors	14.6		203.6		218.2
Other	10.2		3.3		13.5
Total third-party sales	$	593.2	$	247.2	$	840.4


	Year Ended December 31, 2020
	(in millions)
	Sealing Technologies		Advanced Surface Technologies		Total
Aerospace	$	35.5	$	8.0	$	43.5

Chemical and material processing	53.0		—		53.0
Food and pharmaceutical	52.3		—		52.3
General industrial	160.7		2.9		163.6
Medium-duty/heavy-duty truck	241.7		—		241.7
Oil and gas	20.5		2.1		22.6
Power generation	43.6		—		43.6
Semiconductors	14.6		157.1		171.7
Other	7.0		1.0		8.0
Total third-party sales	$	628.9	$	171.1	$	800.0

Sales to one customer of our Sealing Technologies and Advanced Surface Technologies segments represented approximately $296.5 million, $166.4 million, and $132.3 million of our consolidated sales for the years ended December 31, 2022, 2021, and 2020, respectively.


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Capital Expenditures
Sealing Technologies	$	8.2	$	6.3	$	8.0
Advanced Surface Technologies	21.2		8.6		5.3
Corporate	—		—		0.1
Total capital expenditures	$	29.4	$	14.9	$	13.4

Depreciation and Amortization Expense
Sealing Technologies	$	26.1	$	30.6	$	36.5
Advanced Surface Technologies	76.7		32.9		20.0
Corporate	0.3		0.3		0.1
Total depreciation and amortization	$	103.1	$	63.8	$	56.6


	As of December 31,
	2022		2021
	(in millions)
Assets
Sealing Technologies	$	689.6	$	703.9
Advanced Surface Technologies	1,519.6		1,686.5
Corporate	422.7		434.3
Discontinued Operations	15.9		149.9

	$	2,647.8	$	2,974.6


Long-Lived Assets
United States	$	152.7	$	150.6
France	7.4		6.6
Other Europe	0.9		1.4
Other foreign	24.2		25.7
Total	$	185.2	$	184.3

Corporate assets include all of our cash and cash equivalents and long-term deferred income taxes. Long-lived assets consist of property, plant and equipment.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8657-108599

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI https://asc.fasb.org/topic&trid=2134510

+ Details

Commitments and Contingencies

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies


20.			Commitments and Contingencies

General

A description of certain environmental and other legal matters relating to certain of our subsidiaries is included in this section. In addition to the matters noted herein, we are from time to time subject to, and are presently involved in, other litigation and legal proceedings arising in the ordinary course of business. We believe the outcome of such other litigation and legal proceedings will not have a material adverse effect on our financial condition, results of operations and cash flows. Expenses for administrative and legal proceedings are recorded when incurred.

Environmental

Our facilities and operations are subject to federal, state and local environmental and occupational health and safety laws and regulations of the U.S. and foreign countries. We take a proactive approach in our efforts to comply with these laws and regulations as they relate to our manufacturing operations and in proposing and implementing any remedial plans that may be necessary. We also regularly conduct comprehensive environmental, health and safety audits at our facilities to maintain compliance and improve operational efficiency.

Although we believe past operations were in substantial compliance with the then applicable regulations, we or one or more of our subsidiaries are involved with various remediation activities or an investigation to determine responsibility for environmental conditions at 19 sites. At 12 of these sites, the future cost per site for us or our subsidiary is expected to exceed $100,000. Of these 19 sites, 18 are sites where we or one or more of our subsidiaries formerly conducted business operations but no longer do, and 1 is a site where we conduct manufacturing operations. Investigations have been completed for 16 sites. At 8 of these sites, remediation systems are operating while at the other 8 sites, our only obligation is to conduct periodic monitoring. Investigations are in progress at 3 sites. An investigation to determine responsibility for environmental conditions is ongoing at one site.

Our policy is to accrue environmental investigation and remediation costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. In general, due to uncertainties regarding, among other factors, changes to operating and monitoring requirements based on the ongoing performance of the remediation system and/or changes to applicable legal and regulatory requirements, we do not consider costs for remediation activities beyond five years to be reasonably estimable. To the extent that capital costs to be incurred more than five years out, such as costs for the construction or decommissioning of remediation systems, can be reasonable estimated such costs are included in our environmental reserves. For sites with multiple future projected cost scenarios for identified feasible investigation and remediation options where no one estimate is more likely than all the others, our policy is to accrue the lowest estimate among the range of estimates. The measurement of the liability is based on an evaluation of currently available facts with respect to each individual situation and takes into consideration factors such as existing technology, presently enacted laws and regulations and prior experience in the remediation of similar contaminated sites. Liabilities are established for all sites based on these factors. As assessments and remediation progress at individual sites, these liabilities are reviewed and adjusted to reflect additional technical data and legal information. As of December 31, 2022 and 2021, we had accrued liabilities aggregating $42.1 million and $46.6 million, respectively, for estimated future expenditures relating to environmental contingencies. The current portion of our aggregate environmental liability at December 31, 2022, was $10.4 million. These amounts have been recorded on an undiscounted basis in the Consolidated Balance Sheets. Given the uncertainties regarding the status of laws, regulations, enforcement policies, the impact of other parties potentially being fully or partially liable, technology and information related to individual sites, we do not believe it is possible to develop an estimate of the range of reasonably possible environmental loss in excess of our recorded liabilities.

We believe that our accruals for specific environmental liabilities are adequate based on currently available information. Based upon limited information regarding any incremental remediation or other actions that may be required at these sites, we cannot estimate any further loss or a reasonably possible range of loss related to these matters. Actual costs to be incurred in future periods may vary from estimates because of the inherent uncertainties in evaluating environmental exposures due to unknown and changing conditions, changing government regulations and legal standards regarding liability.

Lower Passaic River Study Area

Based on our prior ownership of Crucible Steel Corporation a/k/a Crucible, Inc. (“Crucible”), we may have additional contingent liabilities in one or more significant environmental matters. One such matter, which is included in the 19 sites referred to above, is the Lower Passaic River Study Area of the Diamond Alkali Superfund Site in New Jersey. Crucible operated a steel mill abutting the Passaic River in Harrison, New Jersey from the 1930s until 1974, which was one of many industrial operations on the river dating back to the 1800s. Certain contingent environmental liabilities related to this site were retained by a predecessor of EnPro Holdings when it sold a majority interest in Crucible Materials Corporation (the successor of Crucible) in 1985. The United States Environmental Protection Agency (the “EPA”) notified our subsidiary in September 2003 that it is a potentially responsible party (“PRP”) for Superfund response actions in the lower 17-mile stretch of the Passaic River known as the Lower Passaic River Study Area.

EnPro Holdings and approximately 70 of the numerous other PRPs, known as the Cooperating Parties Group, are parties to a May 2007 Administrative Order on Consent with the EPA to perform a Remedial Investigation/Feasibility Study (“RI/FS”) of the contaminants in the Lower Passaic River Study Area. In September 2018, EnPro Holdings withdrew from the Cooperating Parties Group but remains a party to the May 2007 Administrative Order on Consent. The RI/FS was completed and submitted to the EPA at the end of April 2015. The RI/FS recommends a targeted dredge and cap remedy with monitored natural recovery and adaptive management for the Lower Passaic River Study Area. The cost of such remedy is estimated to be $726 million. Previously, on April 11, 2014, the EPA released its Focused Feasibility Study (the “FFS”) with its proposed plan for remediating the lower eight miles of the Lower Passaic River Study Area. The FFS calls for bank-to-bank dredging and capping of the riverbed of that portion of the river and estimates a range of the present value of aggregate remediation costs of approximately $953 million to approximately $1.73 billion, although estimates of the costs and the timing of costs are inherently imprecise. On March 3, 2016, the EPA issued the final Record of Decision (ROD) as to the remedy for the lower eight miles of the Lower Passaic River Study Area, with the maximum estimated cost being reduced by the EPA from $1.73 billion to $1.38 billion, primarily due to a reduction in the amount of cubic yards of material that will be dredged. In October

2016, Occidental Chemical Corporation, the successor to the entity that operated the Diamond Alkali chemical manufacturing facility, reached an agreement with the EPA to develop the design for this proposed remedy at an estimated cost of $165 million. The EPA has estimated that it will take approximately four years to develop this design. On June 30, 2018, Occidental Chemical Corporation sued over 120 parties, including the Company, in the United States District Court for New Jersey seeking recovery of response costs under the Comprehensive Environmental Response, Compensation and Liability Act ("CERCLA").

No final allocations of responsibility have been made among the numerous PRPs that have received notices from the EPA, there are numerous identified PRPs that have not yet received PRP notices from the EPA, and there are likely many PRPs that have not yet been identified.

On April 14, 2021, the EPA issued its proposed remedy for the upper nine miles of the river, with an estimated present value cost of approximately $441 million. The proposed remedy would involve dredging and capping of the river sediment as an interim remedy followed by a period of monitoring to evaluate the response of the river system to the interim remedy.

When the EPA initiated the allocation process in 2017, it explained that a fair, carefully structured, information-based allocation was necessary to promote settlements. With the completion of the allocation process, in the second quarter of 2021 the EPA began settlement negotiations with the parties that participated in the allocation process, including EnPro. In September 2022, EnPro paid $5.9 million as part of a settlement between those parties and EPA. The payment will be held in escrow until court approval of the settlement. Our reserve for this site at December 31, 2022 was $0.7 million. Further adjustments to our reserve for this site are possible as new or additional information becomes available.

Except with respect to the Lower Passaic River Study Area, we are unable to estimate a reasonably possible range of loss related to any other contingent environmental liability based on our prior ownership of Crucible. See the section entitled “Crucible Steel Corporation a/k/a Crucible, Inc.” in this footnote for additional information.

Arizona Uranium Mines

EnPro Holdings has received notices from the EPA asserting that it is a potentially responsible party under the CERCLA as the successor to a former operator of eight uranium mines in Arizona. The former operator conducted operations at the mines from 1954 to 1957. In the 1990s, remediation work performed by others at these sites consisted of capping the exposed areas of the mines. We have previously reserved amounts of probable loss associated with these mines, principally including the cost of the investigative work to be conducted at such mines. We entered into an Administrative Settlement Agreement and Order on Consent for Interim Removal Action with the EPA effective November 7, 2017 for the performance of this work. In 2020, EPA initiated group discussions with EnPro Holdings and other potentially responsible parties to resolve various technical issues, including the development of cleanup standards. Based on these discussions and subsequent discussions with other responsible parties with similar sites, we have concluded that further remedial work beyond maintenance of and minor repairs to the existing caps is probable, and we have evaluated the feasibility of various remediation scenarios. Our reserve at December 31, 2022 for this site was $12.7 million, which reflects the low end of the range of our reasonably likely liability with respect to these sites. We are not able at this time to estimate the upper end of a range of liability with respect to these sites.

On October 18, 2021, the United States District Court for the District of Arizona approved and entered a Consent Decree pursuant to which the U.S government will reimburse the Company for 35% of necessary costs of response, as defined in 42 U.S.C. section 9601(25), previously or to be in the future incurred by the Company which arise out of or in connection with releases or threatened releases of hazardous substances at or emanating from the mine sites. As of December 31, 2022, we expect contributions of $3.3 million from the U.S. government towards remediation of the site. This amount was included in other assets in the accompanying consolidated balance sheet at December 31, 2022.

In addition to the two sites discussed above, we have additional reserves of $28.7 million, of which $14.6 million pertains to implementing and managing a solution to clean trichloroethylene soil and groundwater contamination at the location of a former operation in Water Valley, Mississippi. These amounts represent a reasonable estimate of our probable future costs to remediate these sites given the facts and circumstances known at December 31, 2022.

Crucible Steel Corporation a/k/a Crucible, Inc.

Crucible, which was engaged primarily in the manufacture and distribution of high technology specialty metal products, was a wholly owned subsidiary of EnPro Holdings until 1983 when its assets and liabilities were distributed to a new Coltec subsidiary, Crucible Materials Corporation. EnPro Holdings sold a majority of the outstanding shares of Crucible Materials Corporation in 1985 and divested its remaining minority interest in 2004. Crucible Materials Corporation filed for Chapter 11 bankruptcy protection in May 2009 and is no longer conducting operations.

We have certain ongoing obligations, which are included in other liabilities in our Consolidated Balance Sheets, including workers’ compensation, retiree medical and other retiree benefit matters, in addition to those mentioned previously related to EnPro Holdings' period of ownership of Crucible. Based on EnPro Holdings' prior ownership of Crucible, we may have certain additional contingent liabilities, including liabilities in one or more significant environmental matters included in the matters discussed in “Environmental” above. Except with respect to those matters for which we have an accrued liability as discussed in "Environmental" above, we are unable to estimate a reasonably possible range of loss related to these contingent liabilities.

Warranties

We provide warranties on many of our products. The specific terms and conditions of these warranties vary depending on the product and the market in which the product is sold. We record a liability based upon estimates of the costs we may incur under our warranties based upon a review of historical warranty experience and information regarding the number, nature, and dollar valuation of specific warranty claims being made by customers. Adjustments are made to the liability as claims data and historical experience necessitate.

Changes in the carrying amount of the product warranty liability for the years ended December 31, 2022, 2021 and 2020 are as follows:


	2022		2021		2020
	(in millions)
Balance at beginning of year	$	4.9	$	6.7	$	10.1
Charges to expense	2.2		0.7		1.4
Settlements made	(1.9)		(2.5)		(4.8)
Balance at end of year	$	5.2	$	4.9	$	6.7

Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2022

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)


21.			Selected Quarterly Financial Data (Unaudited)


	First Quarter				Second Quarter				Third Quarter				Fourth Quarter
(in millions, except per share data)	2022		2021		2022		2021		2022		2021		2022		2021
Net sales	$	270.1	$	199.2	$	277.1	$	218.8	$	280.1	$	209.7	$	271.9	$	212.7
Gross profit	94.7		78.5		112.3		87.2		110.8		83.7		105.5		78.7
Income (loss) from continuing operations	12.2		11.1		26.0		23.4		26.8		24.1		(61.1)		(1.3)
Income from discontinued operations, net of tax	4.9		7.0		8.3		6.0		0.7		3.9		184.5		104.1
Net income	17.1		18.1		34.3		29.4		27.5		28.0		123.4		102.8
Basic earnings (loss) per share:
Continuing operations	$	0.57	$	0.53	$	1.25	1.14		$	1.26	1.17		$	(2.76)	(0.08)
Discontinued operations	0.24		0.34		0.40		0.29		0.03		0.19		8.87		5.05
Net income per share	$	0.81	$	0.87	$	1.65	1.43		$	1.29	1.36		$	6.11	4.97
Diluted earnings (loss) per share:
Continuing operations	$	0.57	$	0.53	$	1.25	1.13		$	1.26	1.16		$	(2.76)	(0.08)
Discontinued operations	0.24		0.34		0.40		0.29		0.03		0.19		8.87		5.05
Net income per share	$	0.81	$	0.87	$	1.65	1.42		$	1.29	1.35		$	6.11	4.97

SCHEDULE II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SCHEDULE II - Valuation and Qualifying Accounts

SCHEDULE II

Valuation and Qualifying Accounts

For the Years Ended December 31, 2022, 2021 and 2020

(in millions)

Allowance for Doubtful Accounts


	Balance, Beginning of Year		Charge to Expense		Write-off of Receivables		Other (1)		Balance, End of Year
2022	$	2.1	$	1.0	$	(0.2)	$	—	$	2.9
2021	$	1.8	$	0.1	$	(0.2)	$	0.4	$	2.1
2020	$	1.5	$	0.8	$	(0.3)	$	(0.2)	$	1.8

(1)Consists primarily of the effect of changes in currency rates.

Deferred Income Tax Valuation Allowance


	Balance, Beginning of Year		Charge to Expense		Divestitures		Other (2)		Balance, End of Year
2022	$	8.9	$	2.3	$	—	$	(0.5)	$	10.7
2021	$	6.6	$	2.6	$	—	$	(0.3)	$	8.9
2020	$	7.0	$	1.1	$	(1.7)	$	0.2	$	6.6

(2)Consists primarily of the effects of changes in currency rates and statutory changes in tax rates.

Overview, Basis of Presentation, and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Consolidated Financial Statements reflect the accounts of the Company and our majority-owned and controlled subsidiaries. All intercompany accounts and transactions between our consolidated operations have been eliminated. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the amounts of assets and liabilities and the disclosures regarding contingent assets and liabilities at period end and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Inventory	Inventory – Effective July 1, 2022, we changed our method of determining cost for certain inventories from a LIFO basis to a FIFO basis for all of our inventories that were still accounted for under LIFO. We concluded the FIFO basis of accounting is the preferable method for determining inventory cost for our businesses because it improves comparability with our peers, harmonizes our accounting for inventory across all locations, more accurately reflects the current value and physical flow of inventory, and aligns operationally with how management views the performance of the business. Inventories are recorded at the lower of cost or net realizable value.We retrospectively applied this change in accounting principle to all prior periods, including discontinued operations; and recorded a cumulative effect adjustment to increase the January 1, 2020 inventory balance by
Revenue Recognition	Revenue Recognition – The largest stream of revenue is product revenue for shipments of the various products discussed further in Note 19, "Business Segment Information," along with a smaller amount of revenue from services that typically take place over a short period of time. We recognize revenue at a point in time following the transfer of control, which typically occurs when a product is shipped or delivered, depending on the terms of the sale agreement, or when services are rendered. Shipping costs billed to customers are recognized as revenue and expensed in cost of goods sold as a fulfillment cost when control of the product transfers to the customer. Payment from customers is typically due within 30 days of the sale for sales in the U.S. For sales outside of the U.S., payment terms may be longer based upon local business customs, but are typically due no later than 90 days after the sale.
Redeemable Non-Controlling Interests	Redeemable Non-Controlling Interests – Non-controlling interests in subsidiaries that are redeemable for cash or other assets outside of the our control are classified as mezzanine equity, outside of equity and liabilities, at the greater of the carrying value or the redemption value. The increases or decreases in the estimated redemption amount are recorded with corresponding adjustments against equity and are reflected in the computation of earnings per share. At December 31, 2022, the redeemable non-controlling interest relates solely to Alluxa.
Foreign Currency Translation	Foreign Currency Translation – The financial statements of those operations whose functional currency is a foreign currency are translated into U.S. dollars using the current rate method. Under this method, all assets and liabilities are translated into U.S. dollars using current exchange rates, and income statement activities are translated using average exchange rates. The foreign currency translation adjustment is included in accumulated other comprehensive income (loss) in the Consolidated Balance Sheets. Gains and losses on foreign currency transactions are included in operating income.
Research and Development Expense	Research and Development Expense – Costs related to research and development activities are expensed as incurred. We perform research and development primarily under Company-funded programs for commercial products.
Income Taxes	Income Taxes – We use the asset and liability method of accounting for income taxes. Temporary differences arising between the tax basis of an asset or liability and its carrying amount on the Consolidated Balance Sheet are used to calculate future income tax assets or liabilities. This method also requires the recognition of deferred tax benefits, such as net operating loss carryforwards. Valuation allowances are recorded as appropriate to reduce deferred tax assets to the amount considered likely to be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to the taxable income (losses) in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the date of enactment of the change. A tax benefit from an uncertain tax position is recognized only if we believe it is more likely than not that the position will be sustained on its technical merits. If the recognition threshold for the tax position is met, only the portion of the tax benefit that we believe is greater than 50 percent likely to be realized is recorded. Our future results may include favorable or unfavorable adjustments to our estimated tax liabilities due to closure of income tax examinations, statute expirations, new regulatory or judicial pronouncements, changes in tax laws, changes in projected levels of taxable income, future tax planning strategies, or other relevant events.The Tax Cuts and Jobs Act (the "Tax Act") provides for a territorial tax system, that includes the global intangible low-taxed income (“GILTI”) provision beginning in 2018. The GILTI provisions require us to include in our U.S. income tax return certain current year foreign subsidiary earnings net of foreign tax credits, subject to limitation. We elected to account for the GILTI tax in the period in which it is incurred.
Cash and Cash Equivalents	Cash and Cash Equivalents – Cash and cash equivalents include cash on hand, demand deposits and highly liquid investments with a maturity of three months or less at the time of purchase.
Receivables	Receivables – Accounts receivable are stated at the historical carrying amount net of write-offs and allowance for doubtful accounts. We establish an allowance for doubtful accounts receivable based on historical experience and any specific customer collection issues we have identified. Doubtful accounts receivable are written off when a settlement is reached for an amount less than the outstanding historical balance or when we have determined the balance will not be collected.
Property, Plant and Equipment	Property, Plant and Equipment – Property, plant and equipment are recorded at cost. Depreciation of plant and equipment is determined on the straight-line method over the following estimated useful lives of the assets: buildings and improvements, 5 to 25 years; machinery and equipment, 3 to 10 years.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets – Goodwill represents the excess of the purchase price over the estimated fair value of the net assets of acquired businesses. Goodwill is not amortized, but instead is subject to impairment testing that is conducted at least annually each calendar year in the fourth quarter. We transitioned from an October 1 annual testing date to a November 1 annual testing date in the fourth quarter of 2021. In making the transition, we performed annual impairment testing for our intangibles on both dates in the fourth quarter of 2021. The goodwill asset impairment test involves comparing the fair value of a reporting unit to its carrying amount. An impairment charge is recognized when the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized would not exceed the total amount of goodwill allocated to that reporting unit. Interim tests during the year may be required if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. To estimate the fair value of our five reporting units, we use both a discounted cash flow and a market valuation approach. The discounted cash flow approach uses cash flow projections and a discount rate to calculate the fair value of each reporting unit while the market approach relies on market multiples of similar companies. The key assumptions used for the discounted cash flow approach include projected revenues and profit margins, projected capital expenditures, changes in working capital, and the current discount and tax rates. For the market approach, we select a group of peer companies that we believe are best representative of each reporting unit. We used a 75% weighting for the discounted cash flow valuation approach and a 25% weighting for the market valuation approach, reflecting our belief that the discounted cash flow valuation approach is a better indicator of a reporting unit's value since it reflects the specific cash flows anticipated to be generated in the future by the business. In the second quarter of 2022, we determined the performance of our Alluxa reporting unit to be a triggering event for an interim goodwill impairment test and, as a result, we performed an assessment as of June 30, 2022. The fair value of our Alluxa reporting unit, which is included in our Advanced Surface Technologies segment, and is allocated $126.0 million of goodwill, exceeded its carrying value by approximately 21% as of the interim testing date. At the time of our annual test as of November 1, 2022, our updated forecast and projections based upon our annual strategic plan indicated that Alluxa’s cash flows were below the June 30, 2022 assessment estimates, and the discount rate to determine fair value utilizing the income approach was significantly higher. The projection and analysis indicated that the book value of the Alluxa reporting unit exceeded fair value by $65.2 million which has been recognized as an impairment charge in the fourth quarter of 2022. The discount rate to determine the fair value of Alluxa increased from 12.0% as of November 1, 2021 to 14.6% as of November 1, 2022, resulting in a $50 million decline in the fair value of the Alluxa reporting unit utilizing the income approach. A 1% increase in the discount rate as of November 1, 2022 to 15.6% would decrease the fair value of the Alluxa reporting unit and result in an increase in the amount of the impairment being recognized by $11.2 million. The fair value of our semiconductor reporting unit, included in the Advanced Surface Technologies segment, exceeded book value by 21.8% as of November 1, 2022. A 1% increase in the discount rate as of November 1, 2022 would result in a decrease in the cushion in the test to 12.7%. Separately, a 1% decline in the year-over-year revenue growth rates over the projection period would lower the cushion to 17.3%. The combination of a 1% increase in the discount rate and a 1% decline in the year-over-year revenue growth rates would lower the cushion to 8.8%. The fair value of the three reporting units of our Sealing Technologies segment all exceeded their respective carrying values by more than 60% as of November 1, 2022. We completed our annual impairment tests of goodwill as of November 1, 2021, October 1, 2021 and 2020 with no impairment indicated. Annual assessments are conducted in the context of information that was reasonably available to us as of the date of the assessment including our best estimates of future sales volumes and prices; material and labor cost and availability; operational efficiency including the impact of projected capital asset additions, and the then current discount rates and tax rates. We will perform our next annual goodwill impairment tests as of November 1, 2023; or earlier, if adverse changes in circumstances result in our assessment that a triggering event has occurred at any of our reporting units and an interim test is required. Other intangible assets are recorded at cost or, when acquired as a part of a business combination, at estimated fair value. These assets include customer relationships, patents and other technology-related assets, trademarks, licenses, and non-compete agreements. Intangible assets that have definite lives are amortized using a method that reflects the pattern in which the economic benefits of the assets are consumed or the straight-line method over estimated useful lives of 1 to 21 years. Intangible assets with indefinite lives are subject to at least annual impairment testing, which were conducted as of November 1 in 2022 and 2021, and as of October 1, 2021 and 2020. The impairment testing compares the fair value of the intangible asset with its carrying amount using the relief from royalty method. The test completed as of November 1, 2022 and 2021, indicated no impairment. Interim tests may be required if an event occurs or circumstances change that would more likely than not reduce the fair value below the carrying value or change the useful life of the asset.
Debt	Debt – Debt issuance costs associated with our senior secured revolving credit facility are presented as an asset and subsequently amortized into interest expense ratably over the term of the revolving debt arrangement. Debt issuance costs associated with any of our other debt instruments that are incremental third-party costs of issuing the debt are recognized as a reduction in the carrying value of the debt and amortized into interest expense over the time period to maturity using the interest method.
Derivative Instruments	Derivative Instruments – We use derivative financial instruments to manage our exposure to various risks. The use of these financial instruments modifies the exposure with the intent of reducing our risk. We do not use financial instruments for trading purposes, nor do we use leveraged financial instruments. The counterparties to these contractual arrangements are major financial institutions. We use multiple financial institutions for derivative contracts to minimize the concentration of credit risk. The current accounting rules require derivative instruments, excluding certain contracts that are issued and held by a reporting entity that are both indexed to its own stock and classified in shareholders’ equity, be reported in the Consolidated Balance Sheets at fair value and that changes in a derivative’s fair value be recognized currently in earnings unless specific hedge accounting criteria are met.
Fair Value Measurements	Fair Value Measurements – Fair value is defined 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. We utilize a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels: •Level 1: Observable inputs such as quoted prices in active markets for identical assets or liabilities. •Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. •Level 3: Unobservable inputs that reflect our own assumptions. The fair value of intangible assets associated with acquisitions is determined using an income valuation approach. Projecting discounted future cash flows requires us to make significant estimates regarding projected revenues and profit margins, projected capital expenditures, changes in working capital, discount rates, attrition rates, royalty rates, obsolescence rates and tax rates. This non-recurring fair value measurement would be classified as Level 3 due to the absence of quoted market prices or observable inputs for assets of a similar nature. We review the carrying amounts of long-lived assets when certain events or changes in circumstances indicate that the carrying amounts may not be recoverable. An impairment loss is recognized when the carrying amount of the asset group is not recoverable and exceeds its fair value. We estimate the fair values of assets subject to long-lived asset impairment based on our own judgments about the assumptions that market participants would use in pricing the assets. In doing so, we use a market approach when available or an income approach based upon discounted cash flows. The key assumptions used for the discounted cash flow approach include expected cash flows based on internal business plans, projected growth rates, discount rates, and royalty rates for certain intangible assets. We classify these fair value measurements as Level 3. Similarly, the fair value computations for the recurring impairment analyses of goodwill and indefinite-lived intangible assets would be classified as Level 3 due to the absence of quoted market prices or observable inputs. The key assumptions used for the discounted cash flow approach include projected revenues and profit margins, projected capital expenditures, changes in working capital, discount rates, tax rates and royalty rates for certain indefinite-lived intangible assets. Significant changes in any of those inputs could result in a significantly different fair value measurement.
Pensions and Postretirement Benefits	Pensions and Postretirement Benefits - Amortization of the net gain or loss resulting from experience different from that assumed and from changes in assumptions is included as a component of benefit cost. If, as of the beginning of the year, that net gain or loss exceeds 10% of the greater of the projected benefit obligation or the market-related value of plan assets, the amortization is that excess divided by the average remaining service period of participating employees expected to receive benefits under the plan. We amortize prior service cost using the straight-line basis over the average future service life of active participants.For segment reporting purposes, we allocate service cost to each location generating those costs. All other components of net periodic pension cost are reported in other (non-operating) expense

Overview, Basis of Presentation, and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Accounting Standards Update and Change in Accounting Principle

The impact of our change in accounting method for valuing certain inventories on our previously issued financial statements is presented in the following tables:


Consolidated Statement of Operations
(in millions)	Year Ended December 31, 2021
	As Reported 1		Effect of Change		As Adjusted
Cost of sales	$	511.8	$	0.5	$	512.3
Gross profit	328.6		(0.5)		328.1
Operating income	65.9		(0.5)		65.4
Income from continuing operations before income taxes	66.5		(0.5)		66.0
Income tax expense	(8.8)		0.1		(8.7)
Income from continuing operations	57.7		(0.4)		57.3
Income from discontinued operations, including gain on sale, net of tax	121.4		(0.4)		121.0
Net income	179.1		(0.8)		178.3
Net income attributable to EnPro Industries, Inc.	$	178.7	$	(0.8)	$	177.9


Consolidated Statement of Operations
(in millions)	Year Ended December 31, 2020
	As Reported 1		Effect of Change		As Adjusted
Cost of sales	$	514.0	$	0.5	$	514.5
Gross profit	286.0		(0.5)		285.5
Operating income	29.6		(0.5)		29.1
Income from continuing operations before income taxes	(23.0)		(0.5)		(23.5)
Income tax benefit	2.4		0.1		2.5
Income from continuing operations	(20.6)		(0.4)		(21.0)
Income from discontinued operations, net of tax	206.3		(7.3)		199.0
Net income	185.7		(7.7)		178.0
Net income attributable to EnPro Industries, Inc.	$	185.3	$	(7.7)	$	177.6


Consolidated Balance Sheet
(in millions)	December 31, 2021
	As Reported 1		Effect of Change		As Adjusted
Inventories	$	132.1	$	3.8	$	135.9
Current assets of discontinued operations	148.9		1.0		149.9
Total current assets	799.9		4.8		804.7
Total assets	$	2,969.8	$	4.8	$	2,974.6

Current liabilities of discontinued operations	$	35.5	$	0.3	$	35.8
Total current liabilities	386.0		0.3		386.3
Deferred taxes and non-current income taxes payable	165.2		0.9		166.1
Total liabilities	1,653.0		1.2		1,654.2
Retained earnings	949.5		3.6		953.1
Total shareholders' equity	1,266.7		3.6		1,270.3
Total liabilities and equity	$	2,969.8	$	4.8	$	2,974.6


Consolidated Statement of Cash Flows
(in millions)	Year Ended December 31, 2021
	As Reported 1		Effect of Change		As Adjusted
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$	179.1	$	(0.8)	$	178.3
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Deferred income taxes	(5.4)		(0.1)		(5.5)
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories	(5.9)		0.5		(5.4)

Net cash provided by operating activities of continuing operations	$	123.7	$	(0.4)	$	124.1

CASH FLOW OF DISCONTINUED OPERATIONS
Operating cash flows	17.5		0.4		17.9
Net cash provided by discontinued operations	$	13.7	$	0.4	$	14.1


Consolidated Statement of Cash Flows
(in millions)	Year Ended December 31, 2020
	As Reported 1		Effect of Change		As Adjusted
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$	185.7	$	(7.7)	$	178.0
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Income from discontinued operations, net of taxes	(206.3)		7.3		(199.0)
Deferred income taxes	(8.9)		(0.1)		(9.0)
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories	12.1		0.5		12.6
Net cash provided by operating activities of continuing operations	$	42.1	$	—	$	42.1

1 As Reported represents the consolidated financial statement balances that have been recast for discontinued operations exclusive of the impact of our change in accounting method from LIFO to FIFO.

Discontinued Operation (Tables)

12 Months Ended

Dec. 31, 2022

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations

The results of our discontinued operations were as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Net sales	$	188.9	$	301.4	$	281.6
Cost of sales	124.6		192.1		190.8
Gross profit	64.3		109.3		90.8
Operating expenses:
Selling, general, and administrative expenses	43.8		76		71.1
Other	0.2		3.6		16.4
Total operating expenses	44.0		79.6		87.5
Operating income from discontinued operations	20.3		29.7		3.3
Other expense	—		—		(7.5)
Income (loss) from discontinued operations before income taxes	20.3		29.7		(4.2)
Income tax benefit (expense)	1.8		(13.9)		1.3
Income (loss) from discontinued operations, net of taxes before gain from sale of discontinued operations	22.1		15.8		(2.9)
Gain from sale of discontinued operations, net of taxes	176.3		105.2		201.9
Income from discontinued operations, net of taxes	$	198.4	$	121.0	$	199.0

The major classes of assets and liabilities for our discontinued Engineered Materials segment are shown below:


(in millions)	December 31, 2022		December 31, 2021
Assets:
Accounts receivable	$	3.8	$	32.0
Inventories	3.1		28.8
Property, plant and equipment	7.6		52.4
Goodwill	—		5.1
Other intangible assets	1.2		19.2
Other assets	0.2		12.4
Current assets of discontinued operations	$	15.9	$	149.9

Liabilities
Accounts payable	$	1.4	$	9.9
Accrued expenses	0.9		18.8
Other liabilities	—		7.1
Current liabilities of discontinued operations	$	2.3	$	35.8

Pursuant to applicable accounting guidance for the reporting of discontinued operations, allocations to our Engineered Materials segment for corporate services not expected to continue at the divested business subsequent to closing have not been reflected in the above financial statements of discontinued operations and have been reclassified to income from continuing operations in our accompanying consolidated financial statements for all periods. In addition, divestiture-related costs previously not allocated to our Engineered Materials segment that were incurred as a result of the divestiture of Engineered

Materials have been reflected in the financial results of discontinued operations. As a result, income (loss) from discontinued operations before income taxes of Engineered Materials has been decreased by $1.7 million for the year ended December 31, 2022 and increased $2.4 million, and $3.9 million, respectively, for the years ended December 31, 2021, and 2020 with offsetting changes in corporate expenses of continuing operations.

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3A
-URI https://asc.fasb.org/extlink&oid=109226691&loc=SL51724579-110230

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=109222650&loc=d3e1474-107760

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5D
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721677-107760

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=109222160&loc=SL51721533-107759

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3A
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721659-107760

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4B
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721665-107760

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5C
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5A
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721671-107760

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4A
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721663-107760

+ Details

Acquisitions and Dispositions (Tables)

12 Months Ended

Dec. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Business Acquisition, Pro Forma Information

The following unaudited pro forma condensed consolidated financial results of operations for the years ended December 31, 2022, 2021, and 2020 are presented as if these acquisitions had been completed before January 1, 2020:



	2022		2021		2020

Pro forma net sales	$	1,099.2	$	1,318.2	$	1,275.2
Pro forma net income (loss) from continuing operations	16.2		202.4		(19.5)

Other Income (Expense) (Tables)

12 Months Ended

Dec. 31, 2022

Other Income and Expenses [Abstract]

Schedule of Restructuring and Impairment Costs By Reportable Segment

Restructuring and impairment costs by reportable segment are as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Sealing Technologies	$	0.7	$	2.4	$	30.3
Advanced Surface Technologies	1.3		—		0.1
Corporate	1.0		0.1		—
	$	3.0	$	2.5	$	30.4

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Income (Loss) Before Income Tax Domestic and Foreign

Income (loss) from continuing operations before income taxes as shown in the Consolidated Statements of Operations consists of the following:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Domestic	$	(77.2)	$	(1.8)	$	(85.9)
Foreign	105.5		67.8		62.4
Total	$	28.3	$	66.0	$	(23.5)

Summary of Income Tax Expense (Benefit) in Consolidated Statements of Operations From Continuing Operations

A summary of income tax expense (benefit) from continuing operations in the Consolidated Statements of Operations is as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Current:
Federal	$	15.0	$	(3.7)	$	(15.1)
Foreign	23.2		17.8		21.5
State	0.2		0.1		0.1
	38.4		14.2		6.5
Deferred:
Federal	(8.9)		2.4		(5.1)
Foreign	(6.4)		(6.8)		(2.6)
State	1.3		(1.1)		(1.3)
	(14.0)		(5.5)		(9.0)
Total	$	24.4	$	8.7	$	(2.5)

Schedule of Deferred Income Tax Assets and Liabilities

Significant components of deferred income tax assets and liabilities are as follows:


	As of December 31,
	2022		2021
	(in millions)
Deferred income tax assets:
Net operating losses and tax credits	$	18.5	$	22.8
Environmental reserves	10.2		11.4
Accruals and reserves	2.4		2.9
Operating leases	10.8		12.5


Interest	7.1		8.8
Compensation and benefits	8.6		8.9
Inventories	2.9		—
Retained liabilities of previously owned businesses	0.5		0.7
Postretirement benefits other than pensions	0.3		0.3
Other	2.5		—
Gross deferred income tax assets	63.8		68.3
Valuation allowance	(10.7)		(8.9)
Total deferred income tax assets	53.1		59.4
Deferred income tax liabilities:
Depreciation and amortization	(160.6)		(183.7)
Operating leases	(10.8)		(12.5)
Cross currency swap	(2.1)		(2.1)
Inventories	—		(1.8)
Pension obligations	(1.6)		(5.3)
Other	—		(0.6)

Total deferred income tax liabilities	(175.1)		(206.0)
Net deferred income tax liabilities	$	(122.0)	$	(146.6)

The net deferred income tax liabilities are reflected on a jurisdictional basis as a component of the December 31, 2022 and 2021 Consolidated Balance Sheet line items noted below:


	As of December 31,
	2022		2021
	(in millions)

Other assets (non-current)	$	12.8	$	17.6

Deferred taxes and non-current income taxes payable	(134.8)		(164.2)
Net deferred income tax liabilities	$	(122.0)	$	(146.6)

Schedule of Reconciliation of Effective Tax Rate

The effective income tax rate from continuing operations varied from the statutory federal income tax rate as follows:


	Percent of Pretax Income Years Ended December 31,
	2022		2021		2020
Statutory federal income tax rate	21.0	%	21.0	%	21.0	%
U.S. taxation of foreign profits, net of foreign tax credits	—		(5.6)		(0.5)
Research and employment tax credits	(2.2)		(1.1)		0.3
State and local taxes	1.5		(1.2)		4.0


Foreign tax rate differences	8.4		10.1		(34.2)

Statutory changes in tax rates	(1.1)		0.2		(1.3)
Valuation allowance	8.1		(5.1)		2.1
Changes in uncertain tax positions	(3.4)		(9.4)		(2.3)
Goodwill impairment	48.4		—		—
Nondeductible expenses	2.3		4.1		(7.6)

GILTI and FDII	4.0		(0.4)		25.4

Other items, net	(0.8)		0.8		3.5
Effective income tax rate	86.2	%	13.4	%	10.4	%

Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of the gross unrecognized tax benefits (excluding interest) is as follows:


(in millions)	2022		2021		2020
Balance at beginning of year	$	5.5	$	12.2	$	10.1
Additions based on tax positions related to the current year	0.2		0.9		1.9
Additions for tax positions of prior years	(0.2)		(0.2)		0.2

Reductions as a result of a lapse in the statute of limitations	(1.0)		(2.9)		—
Reductions as a result of audit/other settlements	—		(4.5)		—

Balance at end of year	$	4.5	$	5.5	$	12.2

Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share

The computation of basic and diluted earnings per share for calendar years 2022, 2021, and 2020 is as follows (in millions, except per share data):


	2022		2021		2020
Numerator (basic and diluted):
Income (loss) from continuing operations attributable to EnPro Industries, Inc.	$	6.7	$	56.9	$	(21.4)
Income from discontinued operations	198.4		121.0		199.0
Net income	$	205.1	$	177.9	$	177.6
Denominator:
Weighted-average shares – basic	20.8		20.6		20.5
Share-based awards	0.1		0.2		—
Weighted-average shares – diluted	20.9		20.8		20.5
Basic earnings (loss) per share:
Continuing operations	$	0.32	$	2.76	$	(1.05)
Discontinued operations	9.54		5.88		9.69
Net income per share	$	9.86	$	8.64	$	8.64
Diluted earnings (loss) per share:
Continuing operations	$	0.32	$	2.74	$	(1.05)
Discontinued operations	9.51		5.83		9.69
Net income per share	$	9.83	$	8.57	$	8.64

Inventories (Tables)

12 Months Ended

Dec. 31, 2022

Inventory Disclosure [Abstract]

Schedule of Inventories


	As of December 31,
	2022		2021
	(in millions)
Finished products	$	51.5	$	45.0
Work in process	32.7		38.8
Raw materials and supplies	67.7		52.1
Total inventories	151.9		135.9

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Schedule of Property Plant and Equipment


	As of December 31,
	2022		2021
	(in millions)
Land	$	6.7	$	6.8
Buildings and improvements	69.0		66.7
Machinery and equipment	232.3		231.5
Construction in progress	23.4		9.5
	331.4		314.5
Less accumulated depreciation	(146.2)		(130.2)
Total	$	185.2	$	184.3

Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Net Carrying Value of Goodwill by Reportable Segment

The changes in the net carrying value of goodwill by reportable segment for the years ended December 31, 2022 and 2021 are as follows:


	Sealing Technologies		Advanced Surface Technologies		Total
	(in millions)


Goodwill as of December 31, 2020	$	297.4	$	307.7	$	605.1
Foreign currency translation	(4.5)		1.4		(3.1)
Acquisition	—		359.5		359.5
Disposition	(13.5)		—		(13.5)


Goodwill as of December 31, 2021	279.4		668.6		948.0
Foreign currency translation	(2.6)		(10.9)		(13.5)
Acquisition	—		0.5		0.5
Disposition	(6.0)		—		(6.0)


Impairment	—		(65.2)		$	(65.2)
Goodwill as of December 31, 2022	$	270.8	$	593.0	$	863.8

Schedule of Finite-lived Intangible Assets

Identifiable intangible assets are as follows:


	As of December 31, 2022				As of December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
	(in millions)
Amortized:
Customer relationships	$	484.5	$	157.6	$	503.4	$	132.9
Existing technology	463.7		71.3		464.9		37.3
Trademarks	64.8		24.0		63.9		19.5
Other	36.4		27.3		36.9		17.9
	1,049.4		280.2		1,069.1		207.6
Indefinite-Lived:
Trademarks	30.6		—		32.7		—
Total	$	1,080.0	$	280.2	$	1,101.8	$	207.6

Schedule of Indefinite-Lived Intangible Assets

Identifiable intangible assets are as follows:


	As of December 31, 2022				As of December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
	(in millions)
Amortized:
Customer relationships	$	484.5	$	157.6	$	503.4	$	132.9
Existing technology	463.7		71.3		464.9		37.3
Trademarks	64.8		24.0		63.9		19.5
Other	36.4		27.3		36.9		17.9
	1,049.4		280.2		1,069.1		207.6
Indefinite-Lived:
Trademarks	30.6		—		32.7		—
Total	$	1,080.0	$	280.2	$	1,101.8	$	207.6

Schedule of Estimated Amortization Expense of Intangible Assets

The estimated amortization expense for definite-lived (amortized) intangible assets for the next five years is as follows (in millions):


2023	$	69.7
2024	$	69.6
2025	$	68.6
2026	$	65.1
2027	$	64.5

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=121556970&loc=SL108378252-109267

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 55
-Paragraph 24
-URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Leases (Tables)

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Schedule of Right of Use Assets and Liabilities

Our right of use assets and liabilities related to operating leases as of December 31, 2022 and December 31, 2021 are as follows:


		As of December 31,
	Balance Sheet Classification	2022		2021
		(in millions)
Right-of-use assets	Other assets	$	45.5	$	51.7

Current liability	Accrued expenses	$	9.2	$	9.5
Long-term liability	Other liabilities	38.1		43.9
Total liability		$	47.3	$	53.4

Schedule of Lease Cost and Cash Flows

Our lease costs and cash flows for the years ended December 31, 2022 and December 31, 2021 were as follows:


	Year ended
	2022		2021
	(in millions)
Lease costs:
Operating lease costs	$	11.0	$	7.7
Short-term and variable lease costs	$	0.2	$	0.2

Cash flows:
Operating cash flows from operating leases	$	10.7	$	7.5

Our weighted average remaining lease term and discount rates at December 31, 2022 and December 31, 2021 were as follows:


	December 31, 2022		December 31, 2021
Weighted average remaining lease term (in years)	6.6		7.2
Weighted average discount rate	3.5	%	3.4	%

Schedule of Maturities of Operating Lease Liabilities

A maturity analysis of undiscounted operating lease liabilities is shown in the table below:


	Operating Lease Payments
	(in millions)
2023	$	10.7
2024	9.4
2025	7.4
2026	6.5
2027	5.1
Thereafter	13.9
Total lease payments	53.0
Less: interest	(5.7)
Present value of lease liabilities	$	47.3

Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2022

Payables and Accruals [Abstract]

Schedule of Accrued Expenses


	As of December 31,
	2022		2021
	(in millions)
Salaries, wages and employee benefits	$	51.6	$	50.5
Interest	4.4		4.9
Environmental	10.4		11.0

Income taxes	10.7		9.3
Taxes other than income	4.6		7.0
Operating lease liability	9.2		9.5
Other	29.3		24.3
	$	120.2	$	116.5

Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Schedule of Long Term Debt


	As of December 31,
	2022		2021
	(in millions)
Senior notes	$	347.2	$	346.5
Revolving credit facility	—		175.0
Term loan facilities	442.6		454.6
Other notes payable	0.9		0.5
	790.7		976.6
Less current maturities of long-term debt	15.6		12.7
	$	775.1	$	963.9

Short-term debt	$	—	$	149.3

Schedule of Future Principal Payments on Long Term Debt

Future principal payments on long-term debt are as follows:


	(in millions)
2023	$	15.6
2024	137.5
2025	15.9
2026	625.9
2027	0.1
Thereafter	0.1
	$	795.1

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized as follows:


	Fair Value Measurements as of
	December 31, 2022		December 31, 2021
	(in millions)
Assets





Foreign currency derivatives	$	8.5	$	8.7
Deferred compensation assets	9.8		10.9
	$	18.3	$	19.6
Liabilities
Deferred compensation liabilities	$	10.3	$	11.4

Schedule of Carrying Value of Financial Instruments

The carrying values of our significant financial instruments reflected in the Consolidated Balance Sheets approximate their respective fair values, except for the following:


	December 31, 2022				December 31, 2021
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in millions)
Long-term debt	$	790.7	$	788.8	$	976.6	$	998.3

Pensions and Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Schedule of Change in Projected Benefit Obligations

The following table sets forth the changes in projected benefit obligations and plan assets of our defined benefit pension and other non-qualified and postretirement plans as of and for the years ended December 31, 2022 and 2021.


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
	(in millions)
Change in Projected Benefit Obligations
Projected benefit obligations at beginning of year	$	335.7	$	350.7	$	3.1	$	3.8
Service cost	1.2		1.5		—		—
Interest cost	9.8		9.0		—		0.1
Actuarial loss (gain)	(77.6)		(10.7)		(0.4)		(0.6)

Settlements	—		—		—		(0.1)
Benefits paid	(15.9)		(14.4)		(0.3)		(0.3)
Curtailments	(1.0)		—		—		—
Plan combination (acquisitions/divestitures)	(3.9)		—		—		—
Other	(0.7)		(0.4)		—		0.2
Projected benefit obligations at end of year	247.6		335.7		2.4		3.1

Schedule of Change in Plan Assets



Change in Plan Assets	2022	2021
Fair value of plan assets at beginning of year	351.4	353.4
Actual return on plan assets	(81.5)	12.2

Benefits paid	(15.9)	(14.4)

Company contributions	0.2	0.3
Plan combination (acquisitions/divestitures)	(0.8)	—
Other	(0.1)	(0.1)
Fair value of plan assets at end of year	253.3	351.4

Schedule of Change in Plan Assets Underfunded Status at End of Year


Funded Status at End of Year			$	5.7					$	15.7					$	(2.4)					$	(3.1)

Schedule Of Projected Benefit Obligations Amounts Recognized In Consolidated Balance Sheets


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
	(in millions)
Amounts Recognized in the Consolidated Balance Sheets
Long-term assets	$	11.7	$	28.6	$	—	$	—
Current liabilities	(0.5)		(0.9)		(0.1)		(0.1)

Long-term liabilities	(5.5)		(12.0)		(2.3)		(3.0)
	$	5.7	$	15.7	$	(2.4)	$	(3.1)

Schedule of Pre Tax Charges Recognized in Accumulated Other Comprehensive Income (Loss)

Pre-tax charges recognized in accumulated other comprehensive income (loss) as of December 31, 2022 and 2021 consist of:


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
	(in millions)
Net actuarial (gain) loss	$	59.6	$	41.7	$	(0.9)	$	(0.4)
Prior service cost	0.6		0.9		—		—
	$	60.2	$	42.6	$	(0.9)	$	(0.4)

Schedule Of Net Periodic Benefit Cost

The following table sets forth the components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for our defined benefit pension and other non-qualified and postretirement plans for the years ended December 31, 2022, 2021 and 2020.


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
	(in millions)
Net Periodic Benefit Cost
Service cost	$	1.2	$	1.5	$	4.5	$	—	$	—	$	—
Interest cost	9.8		9.0		10.4		—		0.1		0.1
Expected return on plan assets	(13.3)		(18.3)		(18.9)		—		—		—
Amortization of prior service cost	0.2		0.1		0.1		—		—		—
Amortization of net loss	0.5		0.7		5.2		0.1		0.1		0.2
Settlements	—		—		—		—		—		(1.1)
Curtailments	(1.0)		—		0.3		—		—		—
Net periodic benefit cost	(2.6)		(7.0)		1.6		0.1		0.2		(0.8)

Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
	(in millions)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	17.2		(4.7)		(7.8)		(0.4)		(0.5)		0.3
Prior service cost	—		0.4		(0.3)		—		—		—
Amortization of net loss	(0.5)		(0.7)		(5.2)		(0.1)		(0.1)		(0.2)
Amortization of prior service cost	(0.2)		(0.1)		(0.1)		—		—		—
Settlements	—		—		—		—		—		1.1
Curtailments	1.0		—		(0.3)		—		—		—
Total recognized in other comprehensive income	17.5		(5.1)		(13.7)		(0.5)		(0.6)		1.2
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	$	14.9	$	(12.1)	$	(12.1)	$	(0.4)	$	(0.4)	$	0.4

Schedule of Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31
Discount rate	5.625	%	3.000	%	2.625	%	5.625	%	3.000	%	2.625	%
Rate of compensation increase	N/A		N/A		3.0	%	N/A		N/A		4.0	%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended December 31
Discount rate	3.000	%	2.625	%	3.375	%	3.000	%	2.625	%	3.375	%
Expected long-term return on plan assets	3.9	%	5.3	%	6.0	%	—		—		—
Rate of compensation increase	N/A		3.0	%	3.0	%	4.0	%	4.0	%	4.0	%

Schedule of Assumed Health Care Cost Trend Rates

We use the Pri-2012 base mortality table with the MP-2021 projection scale to value our domestic pension liabilities.


Assumed Health Care Cost Trend Rates at December 31	2022		2021
Health care cost trend rate assumed for next year	7.0	%	7.0	%
Rate to which the cost trend rate is assumed to decline (the ultimate rate)	4.5	%	4.5	%
Year that the rate reaches the ultimate trend rate	2028		2027

Schedule of Asset Allocation for Pension Plans and Target Allocation By Asset Category

The asset allocation for pension plans at the end of 2022 and 2021, and the target allocation for 2023, by asset category are as follows:


	Target Allocation		Plan Assets at December 31,
	2023		2022		2021
Asset Category
Equity securities	20	%	22	%	22	%
Fixed income	80	%	78	%	78	%
	100	%	100	%	100	%

Schedule of Fair Value of Plan Assets

The investment portfolios of the various funds at December 31, 2022 and 2021 are summarized as follows:


	2022		2021
	(in millions)
Mutual funds – U.S. equity	$	32.6	$	46.2
Mutual funds – international equity	22.3		30.6
Mutual funds - fixed income treasury and money market	197.2		273.5

Cash equivalents	1.2		1.1
	$	253.3	$	351.4

Schedule of Benefit Payments Reflecting Expected Future Service as Appropriate Expected to Be Paid

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid in the following calendar years:


	Pension Benefits		Other Benefits
	(in millions)
2023	$	16.3	$	0.1
2024	16.8		1.4
2025	17.9		0.1
2026	18.0		0.1
2027	18.4		0.1
Years 2027 – 2031	97.8		0.5

Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive Income (loss) by component (after tax) are as follows:


(in millions)	Unrealized Translation Adjustments		Pension and Other Postretirement Plans		Total
Balance at December 31, 2019	9.8		(46.2)		(36.4)


Other comprehensive income before reclassifications	21.5		6.0		27.5
Amounts reclassified from accumulated other comprehensive loss	3.4		3.6		7.0
Net current-period other comprehensive income	24.9		9.6		34.5
Less: other comprehensive income attributable to redeemable non-controlling interests	3.0		—		3.0
Net current-period other comprehensive income attributable to EnPro Industries, Inc.	21.9		9.6		31.5
Balance at December 31, 2020	31.7		(36.6)		(4.9)
Other comprehensive income before reclassifications	2.5		3.8		6.3
Amounts reclassified from accumulated other comprehensive loss	12.9		0.7		13.6
Net current-period other comprehensive income	15.4		4.5		19.9
Less: other comprehensive income attributable to redeemable non-controlling interests	0.4		—		0.4
Net current-period other comprehensive income attributable to EnPro Industries, Inc.	15.0		4.5		19.5
Balance at December 31, 2021	46.7		(32.1)		14.6
Other comprehensive loss before reclassifications	(39.7)		(12.8)		(52.5)
Amounts reclassified from accumulated other comprehensive loss	1.4		(0.2)		1.2
Net current-period other comprehensive income	(38.3)		(13.0)		(51.3)
Less: other comprehensive income attributable to redeemable non-controlling interests	(3.4)		—		(3.4)
Net current-period other comprehensive income (loss) attributable to EnPro Industries, Inc.	(34.9)		(13.0)		(47.9)
Balance at December 31, 2022	$	11.8	$	(45.1)	$	(33.3)

Schedule of Reclassification out of Comprehensive Income (Loss)

Reclassifications out of accumulated other comprehensive income (loss) are as follows:


Details about Accumulated Other Comprehensive Loss Components	Amount Reclassified from Accumulated Other Comprehensive Loss						Affected Statement of Operations Caption
	Years Ended December 31,
	2022		2021		2020
	(in millions)
Pension and other postretirement plans adjustments:
Amortization of actuarial losses	$	0.6	$	0.8	$	5.4	(1)
Amortization of prior service costs	0.2		0.1		0.1		(1)
Curtailments	(1.0)		—		0.3		(1)
Settlements	—		—		(1.1)		(1)
Total before tax	(0.2)		0.9		4.7		Income (loss) from continuing operations before income taxes
Tax benefit	—		(0.2)		(1.1)		Income tax expense
Net of tax	$	(0.2)	$	0.7	$	3.6	Income (loss) from continuing operations




Release of unrealized currency translation adjustment upon sale of investment in foreign entity, net of tax	$	1.4	$	12.9	$	3.4	Other (non-operating) income (expense); Income from discontinued operations, including gain on sale, net of taxes

(1) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost. Since these are components of net periodic pension cost other than service cost, the affected Consolidated Statement of Operations caption is other (non-operating) expense. (See Note 15, "Pensions and Postretirement Benefits" for additional details).

Equity Compensation Plan (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Information With Respect to Stock Options

We used the following assumptions in determining the fair value of these awards:


	Expected stock price volatility		Annual expected dividend yield		Risk free interest rate
Shares granted February 15, 2022
EnPro Industries, Inc.	33.1	%	1.01	%	4.26	%
S&P 600 Capital Goods Index	39.43	%	n/a		4.26	%
Shares granted February 16, 2021
EnPro Industries, Inc.	47.32	%	1.40	%	0.22	%
S&P 600 Capital Goods Index	50.86	%	n/a		0.22	%

The following table provides certain information with respect to stock options as of December 31, 2022:


Range of Exercise Price	Stock Options Outstanding	Stock Options Exercisable	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
Under $80.00	50,787	31,892	$	53.78	7.16
Over $80.00 and under $90.00	69,510	21,689	80.73		8.18
Over $90.00	64,633	3,418	106.47		9.11
Total	184,930	56,999	$	82.32	8.23

Summary of Restricted Share Units Activity, Performance Share Activity and Restricted Stock Activity

A summary of award activity under the Plans is as follows:


	Restricted Share Units
	Shares	Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2021	183,158	70.07
Granted	61,330	107.94
Vested	(79,357)	69.51
Forfeited	(24,634)	74.29

Shares settled for cash	(15,900)	67.90
Nonvested at December 31, 2022	124,597	$	88.52

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Valuation Assumptions

The following assumptions were used to estimate the indicated fair value of the 2022 option awards:


	Grant Date
	February 15, 2022			February 24, 2022
Fair-value at grant date (per share)	$	38.86		$	39.07

Assumptions:
Average expected term	6 years			6 years
Expected volatility	39.85		%	39.88		%
Risk-free interest rate	1.99		%	1.89		%
Expected dividend yield	1.06		%	1.05		%

The following assumptions were used to estimate the indicated fair value of the 2021 option awards:


	Grant Date
	February 25, 2021			May 4, 2021			May 17, 2021			August 5, 2021			November 26, 2021
Fair-value at grant date (per share)	$	27.46		$	30.32		$	33.53		$	29.78		$	36.53

Assumptions:
Average expected term	6 years			6 years			6 years			6 years			5.6 years
Expected volatility	40.29		%	40.37		%	40.46		%	40.65		%	39.51		%
Risk-free interest rate	1.02		%	1.05		%	1.07		%	0.87		%	0.42		%
Expected dividend yield	1.35		%	1.24		%	1.14		%	1.26		%	1.74		%

The following assumptions were used to estimate the indicated fair value of the 2020 option awards:


	Grant Date
	February 27, 2020			August 27, 2020
Fair-value at grant date (per share)	$	13.64		$	18.67

Assumptions:
Average expected term	6 years			6 years
Expected volatility	31.53		%	39.51		%
Risk-free interest rate	1.17		%	0.42		%
Expected dividend yield	1.93		%	1.74		%

Schedule of Share-based Payment Arrangement, Option, Activity

A summary of option activity under the Plans as of December 31, 2022, and changes during the year then ended, is presented below:


	Stock Options Outstanding	Weighted Average Exercise Price
Balance at December 31, 2021	155,036	$	70.46
Granted	57,018	106.54
Exercised	(17,648)	59.25
Forfeited	(9,476)	76.91
Balance at December 31, 2022	184,930	$	82.32

Schedule Of Intrinsic Value Related to stock Options

The year-end intrinsic value related to stock options is presented below:


	December 31,
(in millions)	2022		2021		2020
Options outstanding	$	4.9	$	6.1	$	4.0
Options exercisable	$	2.4	$	1.3	$	0.6

Schedule of Equity Based Compensation

We recognized the following equity-based employee compensation expenses and benefits related to our Plan activity:


	Years Ended December 31,
(in millions)	2022		2021		2020
Compensation expense	$	6.0	$	5.0	$	5.4
Related income tax benefit	$	1.6	$	1.4	$	1.4

Business Segment Information (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Operating Results and Other Financial Data

Segment operating results and other financial data for the years ended December 31, 2022, 2021, and 2020 were as follows:


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Sales
Sealing Technologies	$	624.3	$	599.8	$	636.7
Advanced Surface Technologies	476.1		247.3		171.2
	1,100.4		847.1		807.9
Intersegment sales	(1.2)		(6.7)		(7.9)
Total sales	$	1,099.2	$	840.4	$	800.0

Adjusted Segment EBITDA
Sealing Technologies	$	159.1	$	141.9	$	131.5
Advanced Surface Technologies	141.5		73.2		47.1
Total Adjusted Segment EBITDA	$	300.6	$	215.1	$	178.6

Reconciliation of Adjusted Segment EBITDA to income (loss) from continuing operations before income taxes
Income (loss) from continuing operations before income taxes	$	28.3	$	66.0	$	(23.5)
Acquisition and divestiture expenses	0.5		0.4		9.6
Non-controlling interest compensation allocation	(0.6)		5.3		2.9
Amortization of fair value adjustment to acquisition date inventory	13.3		9.9		3.0
Restructuring and impairment expense	1.9		2.4		14.3
Depreciation and amortization expense	102.8		63.5		56.5
Corporate expenses	47.0		64.9		41.4
Interest expense, net	33.9		13.7		14.9
Goodwill impairment	65.2		—		—
Other income (expense), net	8.3		(11.0)		59.5
Adjusted Segment EBITDA	$	300.6	$	215.1	$	178.6

Schedule of Net Sales by Geographical Area


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Net Sales by Geographic Area
United States	$	687.4	$	445.7	$	477.7
Europe	139.7		132.7		117.5
Other foreign	272.1		262.0		204.8
Total	$	1,099.2	$	840.4	$	800.0

Schedule of Disaggregation of Revenue

Below is a summary of our third-party sales by major end market with which we did business for the years ended December 31, 2022, 2021 and 2020:


	Year Ended December 31, 2022
	(in millions)
	Sealing Technologies		Advanced Surface Technologies		Total
Aerospace	$	41.2	$	6.1	$	47.3

Chemical and material processing	77.6		—		77.6
Food and pharmaceutical	70.8		—		70.8
General industrial	162.3		28.4		190.7
Medium-duty/heavy-duty truck	191.2		—		191.2
Oil and gas	21.4		5.2		26.6
Power generation	43.1		0.1		43.2
Semiconductors	6.1		430.9		437.0
Other	9.7		5.1		14.8
Total third-party sales	$	623.4	$	475.8	$	1,099.2


	Year Ended December 31, 2021
	(in millions)
	Sealing Technologies		Advanced Surface Technologies		Total
Aerospace	$	32.1	$	9.8	$	41.9

Chemical and material processing	72.5		—		72.5
Food and pharmaceutical	65.1		—		65.1
General industrial	161.8		25.7		187.5
Medium-duty/heavy-duty truck	174.3		—		174.3
Oil and gas	19.0		4.6		23.6
Power generation	43.6		0.2		43.8
Semiconductors	14.6		203.6		218.2
Other	10.2		3.3		13.5
Total third-party sales	$	593.2	$	247.2	$	840.4


	Year Ended December 31, 2020
	(in millions)
	Sealing Technologies		Advanced Surface Technologies		Total
Aerospace	$	35.5	$	8.0	$	43.5

Chemical and material processing	53.0		—		53.0
Food and pharmaceutical	52.3		—		52.3
General industrial	160.7		2.9		163.6
Medium-duty/heavy-duty truck	241.7		—		241.7
Oil and gas	20.5		2.1		22.6
Power generation	43.6		—		43.6
Semiconductors	14.6		157.1		171.7
Other	7.0		1.0		8.0
Total third-party sales	$	628.9	$	171.1	$	800.0

Schedule of Segment Related Capital Expenditure, Depreciation and Amortization on those Expenditures


	Years Ended December 31,
	2022		2021		2020
	(in millions)
Capital Expenditures
Sealing Technologies	$	8.2	$	6.3	$	8.0
Advanced Surface Technologies	21.2		8.6		5.3
Corporate	—		—		0.1
Total capital expenditures	$	29.4	$	14.9	$	13.4

Depreciation and Amortization Expense
Sealing Technologies	$	26.1	$	30.6	$	36.5
Advanced Surface Technologies	76.7		32.9		20.0
Corporate	0.3		0.3		0.1
Total depreciation and amortization	$	103.1	$	63.8	$	56.6

Schedule of Total Assets Segment


	As of December 31,
	2022		2021
	(in millions)
Assets
Sealing Technologies	$	689.6	$	703.9
Advanced Surface Technologies	1,519.6		1,686.5
Corporate	422.7		434.3
Discontinued Operations	15.9		149.9

	$	2,647.8	$	2,974.6

Schedule of Long Lived Assets Segment


Long-Lived Assets
United States	$	152.7	$	150.6
France	7.4		6.6
Other Europe	0.9		1.4
Other foreign	24.2		25.7
Total	$	185.2	$	184.3

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Schedule Of Changes In Carrying Amount Of Product Warranty Liability

Changes in the carrying amount of the product warranty liability for the years ended December 31, 2022, 2021 and 2020 are as follows:


	2022		2021		2020
	(in millions)
Balance at beginning of year	$	4.9	$	6.7	$	10.1
Charges to expense	2.2		0.7		1.4
Settlements made	(1.9)		(2.5)		(4.8)
Balance at end of year	$	5.2	$	4.9	$	6.7

Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2022

Quarterly Financial Information Disclosure [Abstract]

Schedule of Selected Quarterly Financial Data (Unaudited)


	First Quarter				Second Quarter				Third Quarter				Fourth Quarter
(in millions, except per share data)	2022		2021		2022		2021		2022		2021		2022		2021
Net sales	$	270.1	$	199.2	$	277.1	$	218.8	$	280.1	$	209.7	$	271.9	$	212.7
Gross profit	94.7		78.5		112.3		87.2		110.8		83.7		105.5		78.7
Income (loss) from continuing operations	12.2		11.1		26.0		23.4		26.8		24.1		(61.1)		(1.3)
Income from discontinued operations, net of tax	4.9		7.0		8.3		6.0		0.7		3.9		184.5		104.1
Net income	17.1		18.1		34.3		29.4		27.5		28.0		123.4		102.8
Basic earnings (loss) per share:
Continuing operations	$	0.57	$	0.53	$	1.25	1.14		$	1.26	1.17		$	(2.76)	(0.08)
Discontinued operations	0.24		0.34		0.40		0.29		0.03		0.19		8.87		5.05
Net income per share	$	0.81	$	0.87	$	1.65	1.43		$	1.29	1.36		$	6.11	4.97
Diluted earnings (loss) per share:
Continuing operations	$	0.57	$	0.53	$	1.25	1.13		$	1.26	1.16		$	(2.76)	(0.08)
Discontinued operations	0.24		0.34		0.40		0.29		0.03		0.19		8.87		5.05
Net income per share	$	0.81	$	0.87	$	1.65	1.42		$	1.29	1.35		$	6.11	4.97

Overview, Basis of Presentation, and Significant Accounting Policies (Details) $ in Millions		3 Months Ended									12 Months Ended
	Nov. 01, 2022 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($) error	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Nov. 01, 2021	Jan. 01, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle
Number of errors identified \| error										2
Net income (loss)											$ 205.1	$ 177.9	$ 177.6
Net income		$ 123.4	$ 27.5	$ 34.3	$ 17.1	$ 102.8	$ 28.0	$ 29.4	$ 18.1		202.3	178.3	178.0
Inventories		151.9				135.9					151.9	135.9
Current assets of discontinued operations		15.9				149.9					15.9	149.9
Retained earnings		1,130.2				953.1					1,130.2	953.1
Cost of sales											675.9	512.3	514.5
Income from discontinued operations, net of taxes		(184.5)	$ (0.7)	(8.3)	$ (4.9)	(104.1)	$ (3.9)	$ (6.0)	$ (7.0)		(198.4)	(121.0)	(199.0)
Contract with customer, liability		310.7				274.7					310.7	274.7
Foreign currency transaction losses											(4.8)	1.7	3.0
Total research and development expenditures											10.1	9.8	9.4
Goodwill		863.8				948.0					863.8	948.0	605.1
Goodwill impairment											65.2	0.0	0.0
Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Inventories															$ 2.7
Current assets of discontinued operations															10.0
Retained earnings															$ 9.7
Adjustment \| Pro Forma
New Accounting Pronouncements or Change in Accounting Principle
Inventories		(7.8)									(7.8)
Cost of sales											4.0
Income from discontinued operations, net of taxes											$ 0.1
Alluxa Inc
New Accounting Pronouncements or Change in Accounting Principle
Goodwill				$ 126.0
Percentage above carrying value (percent)				21.00%
Goodwill impairment		65.2
Decline in fair value of reporting unit	$ 50.0
Alluxa Inc \| Pro Forma
New Accounting Pronouncements or Change in Accounting Principle
Goodwill impairment	$ 11.2
Other Reporting Units
New Accounting Pronouncements or Change in Accounting Principle
Percentage above carrying value (percent)	21.80%
Reporting unit, impact of one percent increase in discount rate	12.70%
Reporting unit, impact of one percent decrease in year over year revenue growth	17.30%
Other Reporting Units \| Pro Forma
New Accounting Pronouncements or Change in Accounting Principle
Percentage above carrying value (percent)	8.80%
Minimum
New Accounting Pronouncements or Change in Accounting Principle
Intangible assets estimated useful lives, in years											1 year
Minimum \| Alluxa Inc \| Measurement Input, Discount Rate
New Accounting Pronouncements or Change in Accounting Principle
Goodwill measurement input														12.00%
Maximum
New Accounting Pronouncements or Change in Accounting Principle
Intangible assets estimated useful lives, in years											21 years
Maximum \| Alluxa Inc
New Accounting Pronouncements or Change in Accounting Principle
Goodwill measurement input	14.60%
Reporting unit, impact of one percent increase in discount rate	15.60%
Building Improvements \| Minimum
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment useful life, in years											5 years
Building Improvements \| Maximum
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment useful life, in years											25 years
Sealing Technologies
New Accounting Pronouncements or Change in Accounting Principle
Contract with customer, liability		123.9				102.8					$ 123.9	102.8
Advanced Surface Technologies
New Accounting Pronouncements or Change in Accounting Principle
Contract with customer, liability		186.8				171.9					$ 186.8	171.9
Machinery and equipment \| Minimum
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment useful life, in years											3 years
Machinery and equipment \| Maximum
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment useful life, in years											10 years
Trade Names
New Accounting Pronouncements or Change in Accounting Principle
Impairment of intangible assets										$ 16.1
Sealing Technologies
New Accounting Pronouncements or Change in Accounting Principle
Goodwill		$ 270.8				$ 279.4					$ 270.8	$ 279.4	$ 297.4
Percentage above carrying value (percent)	60.00%
Goodwill impairment											$ 0.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Backlog orders expected percentage		7.00%									7.00%
Remaining performance obligations, expected timing		1 year									1 year

Overview, Basis of Presentation, and Significant Accounting Policies - Consolidate Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle
Cost of sales									$ 675.9	$ 512.3	$ 514.5
Gross profit	$ 105.5	$ 110.8	$ 112.3	$ 94.7	$ 78.7	$ 83.7	$ 87.2	$ 78.5	423.3	328.1	285.5
Operating income									72.2	65.4	29.1
Income from continuing operations before income taxes									28.3	66.0	(23.5)
Income tax benefit (expense)									(24.4)	(8.7)	2.5
Income (loss) from continuing operations	(61.1)	26.8	26.0	12.2	(1.3)	24.1	23.4	11.1	3.9	57.3	(21.0)
Income from discontinued operations, including gain on sale, net of taxes	184.5	0.7	8.3	4.9	104.1	3.9	6.0	7.0	198.4	121.0	199.0
Net income	$ 123.4	$ 27.5	$ 34.3	$ 17.1	$ 102.8	$ 28.0	$ 29.4	$ 18.1	202.3	178.3	178.0
Net income attributable to EnPro Industries, Inc.									$ 205.1	177.9	177.6
As Reported
New Accounting Pronouncements or Change in Accounting Principle
Cost of sales										511.8	514.0
Gross profit										328.6	286.0
Operating income										65.9	29.6
Income from continuing operations before income taxes										66.5	(23.0)
Income tax benefit (expense)										(8.8)	2.4
Income (loss) from continuing operations										57.7	(20.6)
Income from discontinued operations, including gain on sale, net of taxes										121.4	206.3
Net income										179.1	185.7
Net income attributable to EnPro Industries, Inc.										178.7	185.3
Effect of Change
New Accounting Pronouncements or Change in Accounting Principle
Cost of sales										0.5	0.5
Gross profit										(0.5)	(0.5)
Operating income										(0.5)	(0.5)
Income from continuing operations before income taxes										(0.5)	(0.5)
Income tax benefit (expense)										0.1	0.1
Income (loss) from continuing operations										(0.4)	(0.4)
Income from discontinued operations, including gain on sale, net of taxes										(0.4)	(7.3)
Net income										(0.8)	(7.7)
Net income attributable to EnPro Industries, Inc.										$ (0.8)	$ (7.7)

Overview, Basis of Presentation, and Significant Accounting Policies - Consolidate Statement of Balance sheet (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle
Inventories	$ 151.9	$ 135.9
Current assets of discontinued operations	15.9	149.9
Total current assets	684.2	804.7
Total assets	2,647.8	2,974.6
Current liabilities of discontinued operations	2.3	35.8
Total current liabilities	211.5	386.3
Deferred taxes and non-current income taxes payable	136.5	166.1
Total liabilities	1,234.8	1,654.2
Retained earnings	1,130.2	953.1
Total shareholders' equity	1,395.1	1,270.3	$ 1,081.4	$ 896.6
Total liabilities and equity	$ 2,647.8	2,974.6
As Reported
New Accounting Pronouncements or Change in Accounting Principle
Inventories		132.1
Current assets of discontinued operations		148.9
Total current assets		799.9
Total assets		2,969.8
Current liabilities of discontinued operations		35.5
Total current liabilities		386.0
Deferred taxes and non-current income taxes payable		165.2
Total liabilities		1,653.0
Retained earnings		949.5
Total shareholders' equity		1,266.7
Total liabilities and equity		2,969.8
Effect of Change
New Accounting Pronouncements or Change in Accounting Principle
Inventories		3.8
Current assets of discontinued operations		1.0
Total current assets		4.8
Total assets		4.8
Current liabilities of discontinued operations		0.3
Total current liabilities		0.3
Deferred taxes and non-current income taxes payable		0.9
Total liabilities		1.2
Retained earnings		3.6
Total shareholders' equity		3.6
Total liabilities and equity		$ 4.8

Overview, Basis of Presentation, and Significant Accounting Policies - Consolidate Statement of Cash flows (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$ 123.4	$ 27.5	$ 34.3	$ 17.1	$ 102.8	$ 28.0	$ 29.4	$ 18.1	$ 202.3	$ 178.3	$ 178.0
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Deferred income taxes									(14.0)	(5.5)	(9.0)
Income from discontinued operations, net of taxes	$ (184.5)	$ (0.7)	$ (8.3)	$ (4.9)	$ (104.1)	$ (3.9)	$ (6.0)	$ (7.0)	(198.4)	(121.0)	(199.0)
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories									(18.0)	(5.4)	12.6
Net cash provided by operating activities of continuing operations									106.1	124.1	42.1
CASH FLOW OF DISCONTINUED OPERATIONS
Operating cash flows									21.3	17.9	8.5
Net cash provided by discontinued operations									$ 16.2	14.1	4.0
As Reported
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income										179.1	185.7
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Deferred income taxes										(5.4)	(8.9)
Income from discontinued operations, net of taxes										(121.4)	(206.3)
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories										(5.9)	12.1
Net cash provided by operating activities of continuing operations										123.7	42.1
CASH FLOW OF DISCONTINUED OPERATIONS
Operating cash flows										17.5
Net cash provided by discontinued operations										13.7
Effect of Change
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income										(0.8)	(7.7)
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Deferred income taxes										(0.1)	(0.1)
Income from discontinued operations, net of taxes										0.4	7.3
Change in assets and liabilities, net of effects of divestitures of businesses:
Inventories										0.5	0.5
Net cash provided by operating activities of continuing operations										(0.4)	$ 0.0
CASH FLOW OF DISCONTINUED OPERATIONS
Operating cash flows										0.4
Net cash provided by discontinued operations										$ 0.4

Discontinued Operation - Additional Information (Details) - USD ($) $ in Millions				1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 04, 2022	Dec. 21, 2021	Jan. 21, 2020	Jan. 30, 2023	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain (loss) on disposal of business						$ (0.6)	$ 17.6	$ (2.6)
Proceeds from sale of businesses						301.9	224.3	475.1
Discontinued Operations, Disposed of by Sale \| Engineered Materials
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Cost of sales						124.6	192.1	190.8
Goodwill					$ 0.0	0.0	5.1
Income from discontinued operations before income taxes						20.3	29.7	(4.2)
Income tax benefit (expense)						1.8	(13.9)	1.3
Discontinued Operations, Disposed of by Sale \| Engineered Materials \| Scenario, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Income tax benefit (expense)						$ 1.7	$ (2.4)	$ (3.9)
Disposal by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain (loss) on disposal of business					(0.4)
Disposal by Sale \| GGB
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain (loss) on disposal of business					$ (189.1)
Proceeds from sale of businesses	$ 305.0
Disposal by Sale \| Compressor Products International
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain (loss) on disposal of business		$ 117.6
Proceeds from sale of businesses		$ 185.7
Disposal by Sale \| GPT \| Scenario, Plan \| Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Proceeds from sale of investment projects				$ 31.0
Gain (loss) on disposal of business				14.0
Proceeds from sale of businesses				$ 28.0
Disposal by Sale \| Fairbanks Morse
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Proceeds from sale of investment projects			$ 450.0
The pre-tax gain on the disposition			$ 264.7

Discontinued Operation - Results of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating expenses:
Income from discontinued operations, net of taxes	$ 198.4	$ 121.0	$ 199.0
Discontinued Operations, Disposed of by Sale \| Engineered Materials
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Net sales	188.9	301.4	281.6
Cost of sales	124.6	192.1	190.8
Gross profit	64.3	109.3	90.8
Operating expenses:
Selling, general, and administrative expenses	43.8	76.0	71.1
Other	0.2	3.6	16.4
Total operating expenses	44.0	79.6	87.5
Operating income from discontinued operations	20.3	29.7	3.3
Other expense	0.0	0.0	(7.5)
Income (loss) from discontinued operations before income taxes	20.3	29.7	(4.2)
Income tax adjustments	(1.8)	13.9	(1.3)
Income (loss) from discontinued operations, net of taxes before gain from sale of discontinued operations	22.1	15.8	(2.9)
Gain from sale of discontinued operations, net of taxes	176.3	105.2	201.9
Income from discontinued operations, net of taxes	$ 198.4	$ 121.0	$ 199.0

Discontinued Operation - Classes of Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]
Current assets of discontinued operations	$ 15.9	$ 149.9
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current [Abstract]
Current liabilities of discontinued operations	2.3	35.8
Engineered Materials \| Discontinued Operations, Disposed of by Sale
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]
Accounts receivable	3.8	32.0
Inventories	3.1	28.8
Property, plant and equipment	7.6	52.4
Goodwill	0.0	5.1
Other intangible assets	1.2	19.2
Other assets	0.2	12.4
Current assets of discontinued operations	15.9	149.9
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current [Abstract]
Accounts payable	1.4	9.9
Accrued expenses	0.9	18.8
Other liabilities	0.0	7.1
Current liabilities of discontinued operations	$ 2.3	$ 35.8

Acquisitions and Dispositions - Acquisitions Narrative (Details) $ in Thousands				1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 17, 2021 USD ($) location	Oct. 26, 2020 USD ($) location	Sep. 25, 2019 location installment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Nov. 20, 2020 USD ($)	Oct. 25, 2020
Business Acquisition
Payments to acquire business													$ 31,200	$ 856,800	$ 238,300
Acquisition-related costs														15,000	5,000
Deferred compensation liability					$ 7,800
Total third-party sales					271,900	$ 280,100	$ 277,100	$ 270,100	$ 212,700	$ 209,700	$ 218,800	$ 199,200	1,099,200	840,400	800,000
Disposal by Sale \| Air Springs
Business Acquisition
Retained account receivable																$ 8,600
United States
Business Acquisition
Total third-party sales													687,400	445,700	477,700
NxEdge
Business Acquisition
Number of locations \| location	6
Payments to acquire business	$ 853,900
Total third-party sales														8,600
Income before income taxes														$ 1,900
Alluxa Inc
Business Acquisition
Payments to acquire business		$ 238,400
Acquisition-related costs															5,000
Total third-party sales															5,700
Income before income taxes															$ 6,100
LeanTeq
Business Acquisition
Payments to acquire business					41,900
Rollover equity right term following third anniversary of closing			90 days
Rollover equity rights payable installments \| installment			2
Payments to acquire entity					42,800
Redeemable non controlling interest reclassified to liability					35,000								35,000
Noncontrolling interest					34,100
Accrued business acquisition cost					$ 800								$ 800
LeanTeq \| Forecast
Business Acquisition
Payments to acquire entity				$ 800
LeanTeq \| Taiwan
Business Acquisition
Number of locations \| location			2
LeanTeq \| United States
Business Acquisition
Number of locations \| location			1
LeanTeq \| Lunar
Business Acquisition
Rollover equity rights payable installments term			12 months
Alluxa Inc
Business Acquisition
Number of locations \| location		2
Alluxa Inc \| Acquisition Subsidiary
Business Acquisition
Ownership interest, minority interest																	7.00%
Aggregate value of ownership interest		$ 17,850

Acquisitions and Dispositions - Pro Forma (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition, Pro Forma Information
Pro forma net sales	$ 1,099.2	$ 1,318.2	$ 1,275.2
Pro forma net income (loss) from continuing operations	$ 16.2	$ 202.4	$ (19.5)

Acquisitions and Dispositions - Dispositions Narrative (Details) £ in Thousands, $ in Millions							3 Months Ended					12 Months Ended
	Sep. 02, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 GBP (£)	Nov. 20, 2020 USD ($)	Sep. 02, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Acquisition
Gain (loss) on disposal of business												$ (0.6)	$ 17.6	$ (2.6)
Proceeds from sale of businesses												301.9	224.3	475.1
Loss on sale of assets												(0.1)	0.1	(0.2)
Restructuring and impairment charges												$ 1.9	$ 2.4	14.3
Disposal by Sale
Business Acquisition
Gain (loss) on disposal of business							$ (0.4)
Inventory impairment														0.2
Disposal by Sale \| Polymer
Business Acquisition
Pre-tax book gain (loss) on diposal	$ 19.5
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]													Other income (expense), net
Disposal by Sale \| Technetics Group UK Limited
Business Acquisition
Value added tax payments \| £			£ 148
Working capital payments \| £			50
Loss on sales of investment		$ 1.3	£ 976
Gain on sale of investment								$ 0.1
Disposal by Sale \| Air Springs
Business Acquisition
Gain (loss) on disposal of business								$ 2.1
Proceeds from sale of businesses				$ 23.1
Accounts receivable				6.4
Accounts receivable, face value				7.5
Retained account receivable				$ 8.6
Pre-tax book gain (loss) on diposal									$ (0.1)
Disposal by Sale \| Motor Wheel Brake Drum and Crewson Brake
Business Acquisition
Gain (loss) on disposal of business					$ (3.1)
Restructuring charges														10.5
Proceeds from sale of businesses					8.9
Loss on sale of assets					3.0
Loss on sale of other assets					$ 0.1
Restructuring and impairment charges											$ 7.4			7.4
Inventory impairment														3.6
Disposal by Sale \| Lunar Air Disc Brake
Business Acquisition
Asset impairments						$ 2.1
Net tangible asset write downs						1.6					1.4
Restructuring charges														$ 1.9
Inventory impairment						$ 0.5					$ 0.5
Disposal by Sale \| Lunar Air Disc Brake \| United States
Business Acquisition
Gain (loss) on disposal of business										$ 0.2
Proceeds from sale of businesses										$ 0.3
Disposal by Sale \| Lunar Air Disc Brake \| CHINA
Business Acquisition
Gain (loss) on disposal of business									(0.1)
Proceeds from sale of businesses									$ 0.9

Other Income (Expense) - Additional Information (Detail) $ in Millions			3 Months Ended				12 Months Ended
	Sep. 02, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2022 USD ($) position	Dec. 31, 2021 USD ($) position	Dec. 31, 2020 USD ($) position
New Accounting Pronouncements or Change in Accounting Principle
Restructuring costs incurred							$ 3.0	$ 2.5	$ 30.4
Total workforce reductions (positions) \| position								36
Restructuring and impairment expense							1.9	$ 2.4	14.3
Gain on disposition of property							0.1	(0.1)	0.2
Environmental remediation expense and other							5.1	8.3	36.0
Expense related to components of net benefit cost other than service cost							3.6	8.5	3.1
Foreign currency transaction loss realized							3.8
Decrease in insurance receivables							2.8
Write off of uncertain tax positions							0.9	3.0
Gain (loss) on disposal of business							(0.6)	$ 17.6	(2.6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]								Other income (expense), net
Various Businesses and Product Line
New Accounting Pronouncements or Change in Accounting Principle
Gain (loss) on disposal of business									2.7
Employee Severance
New Accounting Pronouncements or Change in Accounting Principle
Restructuring costs incurred									3.3
Employee Sites and Functions \| United States
New Accounting Pronouncements or Change in Accounting Principle
Restructuring costs incurred							$ 1.8
Total workforce reductions (positions) \| position							25
Net tangible asset write downs							$ 1.2
Disposal by Sale
New Accounting Pronouncements or Change in Accounting Principle
Inventory impairment									0.2
Gain (loss) on disposal of business			$ (0.4)
Net sales									110.1
Disposal by Sale \| Various Businesses and Product Line
New Accounting Pronouncements or Change in Accounting Principle
Gain (loss) on disposal of business								$ 17.5
Net sales								$ 21.4	26.4
Motor Wheel Brake Drum and Crewson Brake \| Disposal by Sale
New Accounting Pronouncements or Change in Accounting Principle
Inventory impairment									3.6
Impairment of intangible assets									3.5
Restructuring and impairment expense						$ 7.4			7.4
Severance costs									$ 0.3
Gain on disposition of property	$ (3.0)
Gain (loss) on disposal of business	$ (3.1)
Lunar Air Disc Brake \| Disposal by Sale
New Accounting Pronouncements or Change in Accounting Principle
Restructuring costs incurred						1.9
Asset write-downs		$ 2.1
Net tangible asset write downs		1.6				1.4
Inventory impairment		$ 0.5				$ 0.5
Lunar Air Disc Brake \| Disposal by Sale \| United States
New Accounting Pronouncements or Change in Accounting Principle
Gain (loss) on disposal of business					$ 0.2
GGB \| Disposal by Sale
New Accounting Pronouncements or Change in Accounting Principle
Gain (loss) on disposal of business			$ (189.1)
Trademarks
New Accounting Pronouncements or Change in Accounting Principle
Impairment of intangible assets					$ 16.1
Metallic Gaskets \| Disposal by Sale
New Accounting Pronouncements or Change in Accounting Principle
Asset write-downs				$ 1.5
Net tangible asset write downs				1.4
Inventory impairment				$ 0.1
Aeris And BatRF \| Sealing Technologies \| Shutdown
New Accounting Pronouncements or Change in Accounting Principle
Total workforce reductions (positions) \| position									101

Other Income (Expense) - Schedule of Restructuring Costs by Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve
Restructuring costs incurred	$ 3.0	$ 2.5	$ 30.4
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]			Other income (expense), net
Operating Segments \| Sealing Technologies
Restructuring Cost and Reserve
Restructuring costs incurred	0.7	2.4	$ 30.3
Operating Segments \| Advanced Surface Technologies
Restructuring Cost and Reserve
Restructuring costs incurred	1.3	0.0	0.1
Corporate
Restructuring Cost and Reserve
Restructuring costs incurred	$ 1.0	$ 0.1	$ 0.0

Income Taxes - Schedule of Income Before Income Tax Domestic and Foreign (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Domestic	$ (77.2)	$ (1.8)	$ (85.9)
Foreign	105.5	67.8	62.4
Income (loss) from continuing operations before income taxes	$ 28.3	$ 66.0	$ (23.5)

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126941158&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Income Taxes - Summary of Income Tax Expense in Consolidated Statements of Operations from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 15.0	$ (3.7)	$ (15.1)
Foreign	23.2	17.8	21.5
State	0.2	0.1	0.1
Current income tax expense	38.4	14.2	6.5
Deferred:
Federal	(8.9)	2.4	(5.1)
Foreign	(6.4)	(6.8)	(2.6)
State	1.3	(1.1)	(1.3)
Deferred income tax expense	(14.0)	(5.5)	(9.0)
Total	$ 24.4	$ 8.7	$ (2.5)

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation Allowance [Line Items]
Change in effective tax rate	5.20%
Net operating loss carryforwards during period	$ 43.9
Net operating loss carryforwards subject to expiration	36.8
Indefinite operating loss carryforwards	7.1
State tax net operating loss carryforwards	3.9
Foreign subsidiaries undistributed earnings	66.7
Foreign earnings repatriated	298.3
Income taxes receivable	2.0
Deferred tax assets, valuation allowance	10.7	$ 8.9
Foreign income tax rate differential, amount	19.9
Nondeductible expense, amount	0.5
Gross unrecognized tax benefits	4.5	5.5	$ 12.2	$ 10.1
Effective tax rate impact if ultimately recognized	4.1	5.1
Amount accrued for interest and penalties	1.2	1.5
Interest and penalties related to unrecognized tax benefits	(0.2)	(1.7)	$ 0.4
Foreign tax credit carryforwards	3.2
Potential decrease in gross unrecognized tax benefits	0.4
GILTI
Valuation Allowance [Line Items]
Foreign subsidiaries undistributed earnings		$ 225.1
Foreign Tax Credit Carryforward
Valuation Allowance [Line Items]
Deferred tax assets, valuation allowance	$ 2.0

Income Taxes - Schedule of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets:
Net operating losses and tax credits	$ 18.5	$ 22.8
Environmental reserves	10.2	11.4
Accruals and reserves	2.4	2.9
Operating leases	10.8	12.5
Interest	7.1	8.8
Compensation and benefits	8.6	8.9
Inventories	2.9	0.0
Retained liabilities of previously owned businesses	0.5	0.7
Postretirement benefits other than pensions	0.3	0.3
Other	2.5	0.0
Gross deferred income tax assets	63.8	68.3
Valuation allowance	(10.7)	(8.9)
Total deferred income tax assets	53.1	59.4
Deferred income tax liabilities:
Depreciation and amortization	(160.6)	(183.7)
Operating leases	(10.8)	(12.5)
Cross currency swap	(2.1)	(2.1)
Inventories	0.0	(1.8)
Pension obligations	(1.6)	(5.3)
Other	0.0	(0.6)
Total deferred income tax liabilities	(175.1)	(206.0)
Net deferred income tax liabilities	$ (122.0)	$ (146.6)

Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Other assets (non-current)	$ 12.8	$ 17.6
Deferred taxes and non-current income taxes payable	(134.8)	(164.2)
Net deferred income tax liabilities	$ (122.0)	$ (146.6)

Income Taxes - Reconciliation of Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	21.00%
U.S. taxation of foreign profits, net of foreign tax credits	0.00%	(5.60%)	(0.50%)
Research and employment tax credits	(2.20%)	(1.10%)	0.30%
State and local taxes	1.50%	(1.20%)	4.00%
Foreign tax rate differences	8.40%	10.10%	(34.20%)
Statutory changes in tax rates	(1.10%)	0.20%	(1.30%)
Valuation allowance	8.10%	(5.10%)	2.10%
Changes in uncertain tax positions	(3.40%)	(9.40%)	(2.30%)
Goodwill impairment	48.40%	0.00%	0.00%
Nondeductible expenses	2.30%	4.10%	(7.60%)
GILTI and FDII	4.00%	(0.40%)	25.40%
Other items, net	(0.80%)	0.80%	3.50%
Effective income tax rate	86.20%	13.40%	10.40%

Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns
Balance at beginning of year	$ 5.5	$ 12.2	$ 10.1
Additions based on tax positions related to the current year	0.2	0.9	1.9
Additions for tax positions of prior years	(0.2)	(0.2)
Additions for tax positions of prior years			0.2
Reductions as a result of a lapse in the statute of limitations	(1.0)	(2.9)	0.0
Reductions as a result of audit/other settlements	0.0	(4.5)	0.0
Balance at end of year	$ 4.5	$ 5.5	$ 12.2

Earnings (Loss) Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator (basic and diluted):
Income (loss) from continuing operations attributable to EnPro Industries, Inc.									$ 6.7	$ 56.9	$ (21.4)
Income from discontinued operations									198.4	121.0	199.0
Net income									205.1	177.9	177.6
Net income									$ 205.1	$ 177.9	$ 177.6
Denominator:
Weighted-average shares – basic (in shares)									20.8	20.6	20.5
Share-based awards (in shares)									0.1	0.2	0.0
Weighted-average shares – diluted (in shares)									20.9	20.8	20.5
Basic earnings (loss) per share:
Continuing operations (in dollars per share)	$ (2,760,000)	$ 1,260,000	$ 1,250,000	$ 570,000	$ (80,000.00)	$ 1,170,000	$ 1,140,000	$ 530,000	$ 0.32	$ 2.76	$ (1.05)
Discontinued operations (in dollars per share)	8,870,000	30,000.00	400,000	240,000	5,050,000.00	190,000	290,000	340,000	9.54	5.88	9.69
Net income per share (in dollars per share)	6,110,000	1,290,000	1,650,000	810,000	4,970,000	1,360,000	1,430,000	870,000	9.86	8.64	8.64
Diluted earnings (loss) per share:
Continuing operations (in dollars per share)	(2,760,000)	1,260,000	1,250,000	570,000	(80,000.00)	1,160,000	1,130,000	530,000	0.32	2.74	(1.05)
Discontinued operations (in dollars per share)	8,870,000	30,000.00	400,000	240,000	5,050,000.00	190,000	290,000	340,000	9.51	5.83	9.69
Net income per share (in dollars per share)	$ 6,110,000	$ 1,290,000	$ 1,650,000	$ 810,000	$ 4,970,000	$ 1,350,000	$ 1,420,000	$ 870,000	$ 9.83	$ 8.57	$ 8.64
Antidilutive securities excluded (in shares)											0.1

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Finished products	$ 51.5	$ 45.0
Work in process	32.7	38.8
Raw materials and supplies	67.7	52.1
Inventories	$ 151.9	$ 135.9

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 331.4	$ 314.5
Less accumulated depreciation	(146.2)	(130.2)
Total	185.2	184.3
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6.7	6.8
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	69.0	66.7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	232.3	231.5
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 23.4	$ 9.5

Goodwill and Other Intangible Assets - Schedule of Changes in Net Carrying Value of Goodwill by Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill
Goodwill, beginning balance	$ 948.0	$ 605.1
Foreign currency translation	(13.5)	(3.1)
Acquisition	0.5	359.5
Disposition	(6.0)	(13.5)
Impairment	(65.2)	0.0	$ 0.0
Goodwill, ending balance	863.8	948.0	605.1
Sealing Technologies
Goodwill
Goodwill, beginning balance	279.4	297.4
Foreign currency translation	(2.6)	(4.5)
Acquisition	0.0	0.0
Disposition	(6.0)	(13.5)
Impairment	0.0
Goodwill, ending balance	270.8	279.4	297.4
Accumulated impairment losses	27.8	27.8	27.8
Advanced Surface Technologies
Goodwill
Goodwill, beginning balance	668.6	307.7
Foreign currency translation	(10.9)	1.4
Acquisition	0.5	359.5
Disposition	0.0	0.0
Impairment	(65.2)
Goodwill, ending balance	593.0	$ 668.6	$ 307.7
Advanced Surface Technologies
Goodwill
Accumulated impairment losses	$ 65.2

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Amortization expense	$ 76.8	$ 44.3	$ 35.6
Sealing Technologies
Segment Reporting Information
Accumulated impairment losses	27.8	$ 27.8	$ 27.8
Advanced Surface Technologies
Segment Reporting Information
Accumulated impairment losses	$ 65.2

Goodwill and Other Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,049.4	$ 1,069.1
Accumulated Amortization	280.2	207.6
Total	1,080.0	1,101.8
Trademarks
Indefinite-lived Intangible Assets
Indefinite-Lived:	30.6	32.7
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	484.5	503.4
Accumulated Amortization	157.6	132.9
Existing technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	463.7	464.9
Accumulated Amortization	71.3	37.3
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	64.8	63.9
Accumulated Amortization	24.0	19.5
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	36.4	36.9
Accumulated Amortization	$ 27.3	$ 17.9

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense of Intangible Assets (Detail) $ in Millions	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2023	$ 69.7
2024	69.6
2025	68.6
2026	65.1
2027	$ 64.5

Leases - Narrative and Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description
Right-of-use assets obtained in exchange for operating lease	$ 5.7	$ 30.0
Building
Lessee, Lease, Description
Building lease, remaining term	10 years
Lease renewal term	5 years
Vehicle, Equipment, and Other Leases
Lessee, Lease, Description
Building lease, remaining term	4 years
Lease renewal term	1 month
Percent of operating lease assets and liabilities	2.00%	6.00%
Real Estate
Lessee, Lease, Description
Percent of operating lease assets and liabilities	98.00%	94.00%

Leases - Balance Sheet Classification (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Right-of-use assets	$ 45.5	$ 51.7
Operating Lease, Right-of-Use Asset, Statement of Financial Position	Other assets	Other assets
Current liability	$ 9.2	$ 9.5
Operating Lease, Liability, Current, Statement of Financial Position	Accrued expenses	Accrued expenses
Long-term liability	$ 38.1	$ 43.9
Operating Lease, Liability, Noncurrent, Statement of Financial Position	Other liabilities	Other liabilities
Total liability	$ 47.3	$ 53.4

Leases - Lease Cost and Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Lease costs:
Operating lease costs	$ 11.0	$ 7.7
Short-term and variable lease costs	0.2	0.2
Cash flows:
Operating cash flows from operating leases	$ 10.7	$ 7.5
Weighted average remaining lease term (in years)	6 years 7 months 6 days	7 years 2 months 12 days
Weighted average discount rate	3.50%	3.40%

Leases - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Lease Payments
2023	$ 10.7
2024	9.4
2025	7.4
2026	6.5
2027	5.1
Thereafter	13.9
Total lease payments	53.0
Less: interest	(5.7)
Present value of lease liabilities	$ 47.3	$ 53.4

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Salaries, wages and employee benefits	$ 51.6	$ 50.5
Interest	4.4	4.9
Environmental	10.4	11.0
Income taxes	10.7	9.3
Taxes other than income	4.6	7.0
Operating lease liability	9.2	9.5
Other	29.3	24.3
Total accrued expenses	$ 120.2	$ 116.5

Debt - Schedule of Long Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument
Long-term debt	$ 790.7	$ 976.6
Less current maturities of long-term debt	15.6	12.7
Long-term debt, net	775.1	963.9
Short-term debt	0.0	149.3
Senior notes
Debt Instrument
Long-term debt	347.2	346.5
Line of Credit \| Revolving credit facility
Debt Instrument
Long-term debt	0.0	175.0
Line of Credit \| Term loan facilities
Debt Instrument
Long-term debt	442.6	454.6
Other notes payable
Debt Instrument
Long-term debt	$ 0.9	$ 0.5

Debt - Additional Information (Detail) - USD ($)					12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Nov. 08, 2022	Dec. 17, 2021	Oct. 15, 2021	Oct. 17, 2018	Dec. 31, 2022	Dec. 31, 2021	Oct. 31, 2018
Line of Credit Facility
Long-term debt					$ 790,700,000	$ 976,600,000
Unamortized debt discount					4,400,000
Debt issuance costs capitalized						4,700,000
Short-term debt					0	149,300,000
Line of Credit
Line of Credit Facility
Maximum borrowing capacity expansion threshold		$ 275,000,000
Maximum borrowing capacity expansion threshold, percent		100.00%
Senior notes		$ 1,007,500,000
Senior notes
Line of Credit Facility
Long-term debt					347,200,000	346,500,000
Senior notes				$ 350,000,000
Interest rate				5.75%			5.875%
Aggregate principal amount redeemed							$ 450,000,000
Revolving Credit Facility \| Line of Credit
Line of Credit Facility
Credit facility maximum availability		5 years
Line of credit facility, maximum borrowing capacity		$ 400,000,000
Credit facility borrowing capacity					389,200,000
Letter of credit outstanding					10,800,000
Long-term debt					$ 0	175,000,000.0
Revolving Credit Facility \| Line of Credit \| SOFR
Line of Credit Facility
Line of credit facility, unused capacity, commitment fee percentage	0.225%
Term loan facilities \| LIBOR \| Line of Credit
Line of Credit Facility
Variable rate on debt					1.50%
Term loan facilities \| SOFR \| Line of Credit
Line of Credit Facility
Variable rate on debt	0.10%
Debt instrument, interest rate, increase (decrease)	1.75%
Term loan facilities \| Base Rate \| Line of Credit
Line of Credit Facility
Variable rate on debt					0.50%
Term loan facilities \| Line of Credit
Line of Credit Facility
Long-term debt					$ 442,600,000	$ 454,600,000
Term Loan A-1 \| Line of Credit
Line of Credit Facility
Line of credit facility, maximum borrowing capacity		$ 142,500,000
Debt instrument, periodic payment, year one, percentage of principal					2.50%
Debt instrument, periodic payment, year two, percentage of principal					5.00%
Debt instrument, periodic payment, year three, percentage of principal					1.25%
Long-term debt					$ 137,000,000
Senior notes					$ 150,000,000
Term Loan A-2 \| Line of Credit
Line of Credit Facility
Credit facility maximum availability		5 years
Line of credit facility, maximum borrowing capacity		$ 315,000,000
Debt instrument, periodic payment, years one through three, percentage of principal					2.50%
Debt instrument, periodic payment, year four, percentage of principal					5.00%
Debt instrument, periodic payment, year five, percentage of principal					1.25%
Long-term debt					$ 307,100,000
364-Day facility \| Line of Credit
Line of Credit Facility
Line of credit facility, maximum borrowing capacity		$ 150,000,000
364-Day facility \| LIBOR \| Line of Credit
Line of Credit Facility
Variable rate on debt					1.75%
364-Day facility \| Base Rate \| Line of Credit
Line of Credit Facility
Variable rate on debt					0.75%
Before October 15, 2021 \| Senior notes
Line of Credit Facility
Redemption price			100.00%	100.00%

Debt - Schedule of Future Principal Payments on Long-Term Debt (Detail) $ in Millions	Dec. 31, 2022 USD ($)
Long-Term Debt
2023	$ 15.6
2024	137.5
2025	15.9
2026	625.9
2027	0.1
Thereafter	0.1
Total	$ 795.1

Derivatives and Hedging Derivatives and Hedging (Details) € in Millions	Sep. 15, 2022 USD ($)	Dec. 31, 2022 EUR (€)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 31, 2019 EUR (€)	May 31, 2019 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 USD ($)
Derivative
Derivative asset			$ 8,500,000	$ 8,700,000
Foreign Exchange Contract
Derivative
Notional amount			103,300,000	$ 3,300,000
Currency Swap
Derivative
Derivative liability, notional amount						$ 100,000,000		$ 200,000,000
Amount of hedged item \| €		€ 95.0			€ 89.6		€ 172.8
Weighted average interest rate					3.50%	3.50%	2.80%	2.80%
Derivative cash	$ 30,800,000
Fair value contracts	27,400,000
Interest receivable	3,400,000
Unrealized gains	$ 20,800,000
Currency Swap
Derivative
Derivative asset			$ 8,500,000

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Foreign currency derivatives	$ 8.5	$ 8.7
Deferred compensation assets	9.8	10.9
Assets fair value	18.3	19.6
Liabilities
Deferred compensation liabilities	$ 10.3	$ 11.4
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other assets

Fair Value Measurements - Schedule of Carrying Value of Financial Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Carrying Value	$ 790.7	$ 976.6
Fair Value	$ 788.8	$ 998.3

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Pensions and Postretirement Benefits - Additional Information (Detail) - USD ($)		12 Months Ended
	Jan. 01, 2007	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure
Minimum age of salaried employees with defined pension plans, in years	40 years
Percentage of matching contributions for eligible employees of their eligible earnings	6.00%
Additional employer contribution for those employees whose defined pension plan benefits were frozen	2.00%
Matching contributions under plans		$ 8,600,000	$ 8,300,000	$ 7,500,000
Company contributions		0	0	$ 0
Projected benefit obligation for the defined benefit pension plans with projected benefit obligations in excess of plan assets		6,100,000	13,900,000
Fair value of plan assets for the defined benefit pension plans with projected benefit obligations in excess of plan assets		200,000	1,000,000
Fair value of plan assets for the defined benefit pension plans with accumulated benefit obligations in excess of plan assets		4,300,000	10,100,000
Accumulated benefit obligation for the defined benefit pension plans with accumulated benefit obligations in excess of plan assets		$ 200,000	1,000,000
Discount rate		5.60%
Pension Benefits
Defined Benefit Plan Disclosure
Company contributions		$ 200,000	300,000
Accumulated benefit obligation for all existing plans		$ 245,900,000	$ 331,900,000
Discount rate		5.625%	3.00%	2.625%
Basis point decrease (increase) in discount rate		0.25%
Pension expense per year		$ 100,000
Other Benefits
Defined Benefit Plan Disclosure
Accumulated benefit obligation for all existing plans		$ 2,400,000	$ 3,100,000
Discount rate		5.625%	3.00%	2.625%
United States
Defined Benefit Plan Disclosure
Company contributions				$ 4,000,000
Foreign Plan
Defined Benefit Plan Disclosure
Company anticipates future contributions		$ 800,000

Pensions and Postretirement Benefits - Schedule of Change in Projected Benefit Obligations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Change in Projected Benefit Obligations
Projected benefit obligations at beginning of year	$ 335.7	$ 350.7
Service cost	1.2	1.5	$ 4.5
Interest cost	9.8	9.0	10.4
Actuarial loss (gain)	(77.6)	(10.7)
Settlements	0.0	0.0
Benefits paid	(15.9)	(14.4)
Curtailments	(1.0)	0.0
Plan combination (acquisitions/divestitures)	(3.9)	0.0
Other	(0.7)	(0.4)
Projected benefit obligations at end of year	247.6	335.7	350.7
Other Benefits
Change in Projected Benefit Obligations
Projected benefit obligations at beginning of year	3.1	3.8
Service cost	0.0	0.0	0.0
Interest cost	0.0	0.1	0.1
Actuarial loss (gain)	(0.4)	(0.6)
Settlements	0.0	(0.1)
Benefits paid	(0.3)	(0.3)
Curtailments	0.0	0.0
Plan combination (acquisitions/divestitures)	0.0	0.0
Other	0.0	0.2
Projected benefit obligations at end of year	$ 2.4	$ 3.1	$ 3.8

Pensions and Postretirement Benefits - Schedule of Change in Plan Assets and Underfunded Status at End of Year (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	$ 253,300,000	$ 351,400,000
Company contributions	0	0	$ 0
Fair value of plan assets at end of year	351,400,000
Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	253,300,000	351,400,000	$ 353,400,000
Actual return on plan assets	(81,500,000)	12,200,000
Benefits paid	(15,900,000)	(14,400,000)
Company contributions	200,000	300,000
Plan combination (acquisitions/divestitures)	(800,000)	0
Other	(100,000)	(100,000)
Fair value of plan assets at end of year	$ 351,400,000	$ 353,400,000

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References + Details

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References + Details

Pensions and Postretirement Benefits - Schedule of Projected Benefit Obligations Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits
Amounts Recognized in the Consolidated Balance Sheets
Long-term assets	$ 11.7	$ 28.6
Current liabilities	(0.5)	(0.9)
Long-term liabilities	(5.5)	(12.0)
Funded Status at End of Year	5.7	15.7
Other Benefits
Amounts Recognized in the Consolidated Balance Sheets
Long-term assets	0.0	0.0
Current liabilities	(0.1)	(0.1)
Long-term liabilities	(2.3)	(3.0)
Funded Status at End of Year	$ (2.4)	$ (3.1)

Pensions and Postretirement Benefits - Schedule of Pre-Tax Charges Recognized in Accumulated Other Comprehensive Income Loss (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax
Net actuarial (gain) loss	$ 59.6	$ 41.7
Prior service cost	0.6	0.9
Accumulated other comprehensive income	60.2	42.6
Other Benefits
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax
Net actuarial (gain) loss	(0.9)	(0.4)
Prior service cost	0.0	0.0
Accumulated other comprehensive income	$ (0.9)	$ (0.4)

Pensions and Postretirement Benefits - Schedule of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Net Periodic Benefit Cost
Service cost	$ 1.2	$ 1.5	$ 4.5
Interest cost	9.8	9.0	10.4
Expected return on plan assets	(13.3)	(18.3)	(18.9)
Amortization of prior service cost	0.2	0.1	0.1
Amortization of net loss	0.5	0.7	5.2
Settlements	0.0	0.0	0.0
Curtailments	(1.0)	0.0	0.3
Net periodic benefit cost	(2.6)	(7.0)	1.6
Other Benefits
Net Periodic Benefit Cost
Service cost	0.0	0.0	0.0
Interest cost	0.0	0.1	0.1
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service cost	0.0	0.0	0.0
Amortization of net loss	0.1	0.1	0.2
Settlements	0.0	0.0	(1.1)
Curtailments	0.0	0.0	0.0
Net periodic benefit cost	$ 0.1	$ 0.2	$ (0.8)

Pensions and Postretirement Benefits - Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	$ 17.0	$ (4.8)	$ (7.8)
Pension Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	17.2	(4.7)	(7.8)
Prior service cost	0.0	0.4	(0.3)
Amortization of net loss	(0.5)	(0.7)	(5.2)
Amortization of prior service cost	(0.2)	(0.1)	(0.1)
Settlements	0.0	0.0	0.0
Curtailments	1.0	0.0	(0.3)
Total recognized in other comprehensive income	17.5	(5.1)	(13.7)
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	14.9	(12.1)	(12.1)
Pension and other postretirement plan service cost	(2.6)	(7.0)	1.6
Other Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	(0.4)	(0.5)	0.3
Prior service cost	0.0	0.0	0.0
Amortization of net loss	(0.1)	(0.1)	(0.2)
Amortization of prior service cost	0.0	0.0	0.0
Settlements	0.0	0.0	1.1
Curtailments	0.0	0.0	0.0
Total recognized in other comprehensive income	(0.5)	(0.6)	1.2
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	(0.4)	(0.4)	0.4
Pension and other postretirement plan service cost	$ 0.1	$ 0.2	$ (0.8)

Pensions and Postretirement Benefits - Schedule of Weighted-Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31
Discount rate	5.60%
Pension Benefits
Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31
Discount rate	5.625%	3.00%	2.625%
Rate of compensation increase			3.00%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended December 31
Discount rate	3.00%	2.625%	3.375%
Expected long-term return on plan assets	3.90%	5.30%	6.00%
Rate of compensation increase		3.00%	3.00%
Other Benefits
Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31
Discount rate	5.625%	3.00%	2.625%
Rate of compensation increase			4.00%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended December 31
Discount rate	3.00%	2.625%	3.375%
Expected long-term return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	4.00%	4.00%	4.00%

Pensions and Postretirement Benefits - Schedule of Assumed Health Care Cost Trend Rates (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Health care cost trend rate assumed for next year	7.00%	7.00%
Rate to which the cost trend rate is assumed to decline (the ultimate rate)	4.50%	4.50%
Year that the rate reaches the ultimate trend rate	2028	2027

Pensions and Postretirement Benefits - Schedule of Asset Allocation for Pension Plans and Target Allocation by Asset Category (Detail)	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Target Allocation	100.00%
Plan Assets	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure
Target Allocation	20.00%
Plan Assets	22.00%	22.00%
Fixed income
Defined Benefit Plan Disclosure
Target Allocation	80.00%
Plan Assets	78.00%	78.00%

Pensions and Postretirement Benefits - Schedule of Fair Value of Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Defined benefit plan investment	$ 253.3	$ 351.4
Mutual funds – U.S. equity
Defined Benefit Plan Disclosure
Defined benefit plan investment	32.6	46.2
Mutual funds – international equity
Defined Benefit Plan Disclosure
Defined benefit plan investment	22.3	30.6
Mutual funds - fixed income treasury and money market
Defined Benefit Plan Disclosure
Defined benefit plan investment	197.2	273.5
Cash equivalents
Defined Benefit Plan Disclosure
Defined benefit plan investment	$ 1.2	$ 1.1

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References + Details

Pensions and Postretirement Benefits - Schedule of Benefit Payments Reflecting Expected Future Service as Appropriate Expected to be Paid (Detail) $ in Millions	Dec. 31, 2022 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure
2023	$ 16.3
2024	16.8
2025	17.9
2026	18.0
2027	18.4
Years 2027 – 2031	97.8
Other Benefits
Defined Benefit Plan Disclosure
2023	0.1
2024	1.4
2025	0.1
2026	0.1
2027	0.1
Years 2027 – 2031	$ 0.5

Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended			12 Months Ended
	Feb. 28, 2023	Oct. 31, 2022	Oct. 31, 2018	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Dividends paid				$ 23.4	$ 22.4	$ 21.7
Stock repurchase program, period in force		2 years	2 years
Authorized amount (up to)			$ 50.0
Shares repurchases (in shares)						0.1
Repurchase of common stock						$ 5.3
Stock repurchase program, remaining authorized repurchase amount		$ 50.0
Subsequent Event
Subsequent Event [Line Items]
Cash dividend declared (in dollars per share)	$ 0.29

Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Loss by Components (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income
Beginning balance	$ 1,270.3	$ 1,081.4	$ 896.6
Other comprehensive loss before reclassifications	(52.5)	6.3	27.5
Amounts reclassified from accumulated other comprehensive loss	1.2	13.6	7.0
Other comprehensive income (loss), net of tax	(51.3)	19.9	34.5
Less: other comprehensive income (loss) attributable to non-controlling interests	(3.4)	0.4	3.0
Other comprehensive income (loss), net of tax attributable to EnPro Industries, Inc	(47.9)	19.5	31.5
Ending balance	1,395.1	1,270.3	1,081.4
Total
Accumulated Other Comprehensive Income
Beginning balance	14.6	(4.9)	(36.4)
Other comprehensive income (loss), net of tax attributable to EnPro Industries, Inc	(47.9)	19.5	31.5
Ending balance	(33.3)	14.6	(4.9)
Unrealized Translation Adjustments
Accumulated Other Comprehensive Income
Beginning balance	46.7	31.7	9.8
Other comprehensive loss before reclassifications	(39.7)	2.5	21.5
Amounts reclassified from accumulated other comprehensive loss	1.4	12.9	3.4
Other comprehensive income (loss), net of tax	(38.3)	15.4	24.9
Less: other comprehensive income (loss) attributable to non-controlling interests	(3.4)	0.4	3.0
Other comprehensive income (loss), net of tax attributable to EnPro Industries, Inc	(34.9)	15.0	21.9
Ending balance	11.8	46.7	31.7
Pension and Other Postretirement Plans
Accumulated Other Comprehensive Income
Beginning balance	(32.1)	(36.6)	(46.2)
Other comprehensive loss before reclassifications	(12.8)	3.8	6.0
Amounts reclassified from accumulated other comprehensive loss	(0.2)	0.7	3.6
Other comprehensive income (loss), net of tax	(13.0)	4.5	9.6
Less: other comprehensive income (loss) attributable to non-controlling interests	0.0	0.0	0.0
Other comprehensive income (loss), net of tax attributable to EnPro Industries, Inc	(13.0)	4.5	9.6
Ending balance	$ (45.1)	$ (32.1)	$ (36.6)

Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Other income (expense), net									$ (10.0)	$ 14.3	$ (37.7)
Tax benefit									(24.4)	(8.7)	2.5
Net income	$ 123.4	$ 27.5	$ 34.3	$ 17.1	$ 102.8	$ 28.0	$ 29.4	$ 18.1	202.3	178.3	178.0
Release of unrealized currency translation adjustment upon sale of investment in foreign entity, net of tax									1.4	12.9	3.4
Amount Reclassified from Accumulated Other Comprehensive Loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Total before tax									(0.2)	0.9	4.7
Tax benefit									0.0	(0.2)	(1.1)
Net income									(0.2)	0.7	3.6
Amount Reclassified from Accumulated Other Comprehensive Loss \| Amortization of actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Other income (expense), net									0.6	0.8	5.4
Amount Reclassified from Accumulated Other Comprehensive Loss \| Amortization of prior service costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Other income (expense), net									0.2	0.1	0.1
Amount Reclassified from Accumulated Other Comprehensive Loss \| Curtailments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Other income (expense), net									(1.0)	0.0	0.3
Amount Reclassified from Accumulated Other Comprehensive Loss \| Settlements
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Other income (expense), net									$ 0.0	$ 0.0	$ (1.1)

Equity Compensation Plan - Additional Information (Detail) - USD ($) shares in Millions											12 Months Ended
	Feb. 24, 2022	Feb. 15, 2022	Nov. 26, 2021	Aug. 05, 2021	May 17, 2021	May 04, 2021	Feb. 25, 2021	Aug. 27, 2020	Feb. 27, 2020	Jan. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Shares available for future awards (in shares)											1.4
Compensation expense											$ 6,000,000.0	$ 5,000,000.0	$ 5,400,000
Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Award vesting period										3 years
Unrecognized compensation cost											$ 6,800,000
Unrecognized compensation cost expected to be recognized over a weighted average remaining amortization period, years											1 year 9 months 18 days
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Award performance period											3 years
Unrecognized compensation cash											$ 6,200,000
Unrecognized compensation cash expected to be recognized over a weighted average period, years											1 year 6 months
Deferred compensation cash-based arrangements, liability, current											$ 7,500,000
Deferred Compensation Liability, Current and Noncurrent											15,600,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized compensation cost											$ 2,400,000
Expiration period											10 years
Percentage of fair market value on the date of grant											100.00%
Average expected term	6 years	6 years	5 years 7 months 6 days	6 years	6 years	6 years	6 years	6 years	6 years
Non-Employee Director
Share-based Compensation Arrangement by Share-based Payment Award
Cash payments to settle phantom shares											$ 0	0	0
Non-Employee Director \| Phantom Shares
Share-based Compensation Arrangement by Share-based Payment Award
Compensation expense											1,000,000	1,000,000	900,000
Value of award received											110,000	110,000	110,000
Key Employees \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Compensation expense											$ 7,800,000	$ 6,900,000	$ 1,700,000

Equity Compensation Plan - Issued Performance Share Awards to Eligible Participants (Details)	Feb. 15, 2022	Feb. 16, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Expected stock price volatility	39.43%	50.86%
Risk free interest rate	4.26%	0.22%
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Expected stock price volatility	33.10%	47.32%
Annual expected dividend yield	1.01%	1.40%
Risk free interest rate	4.26%	0.22%

Equity Compensation Plan - Summary of Restricted Share Units Activity, Performance Share Activity and Restricted Stock Activity (Detail) - Restricted Share Units	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Shares
Nonvested shares, beginning Balance \| shares	183,158
Granted, shares \| shares	61,330
Vested, shares \| shares	(79,357)
Forfeited, shares \| shares	(24,634)
Shares settled for cash, shares \| shares	(15,900)
Nonvested Shares, ending Balance \| shares	124,597
Weighted- Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share) \| $ / shares	$ 70.07
Granted (in dollars per share) \| $ / shares	107.94
Vested (in dollars per share) \| $ / shares	69.51
Forfeited (in dollars per share) \| $ / shares	74.29
Shares settled for cash (in dollars per share) \| $ / shares	67.90
Nonvested, ending balance (in dollars per share) \| $ / shares	$ 88.52

Equity Compensation Plan - Schedule of Information With Respect to Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Payment Arrangement, Option, Exercise Price Range
Share Options Outstanding (in shares)	184,930	155,036
Stock Options Exercisable (in shares)	56,999
Weighted Average Exercise Price (in dollars per share)	$ 82.32
Weighted Average Remaining Contractual Life	8 years 2 months 23 days
Under $80.00
Share-based Payment Arrangement, Option, Exercise Price Range
Upper range limit (exercise price)	$ 80.00
Share Options Outstanding (in shares)	50,787
Stock Options Exercisable (in shares)	31,892
Weighted Average Exercise Price (in dollars per share)	$ 53.78
Weighted Average Remaining Contractual Life	7 years 1 month 28 days
Over $80.00 and under $90.00
Share-based Payment Arrangement, Option, Exercise Price Range
Lower range limit (exercise price)	$ 80.00
Upper range limit (exercise price)	$ 90.00
Share Options Outstanding (in shares)	69,510
Stock Options Exercisable (in shares)	21,689
Weighted Average Exercise Price (in dollars per share)	$ 80.73
Weighted Average Remaining Contractual Life	8 years 2 months 4 days
Over $90.00
Share-based Payment Arrangement, Option, Exercise Price Range
Lower range limit (exercise price)	$ 90.00
Share Options Outstanding (in shares)	64,633
Stock Options Exercisable (in shares)	3,418
Weighted Average Exercise Price (in dollars per share)	$ 106.47
Weighted Average Remaining Contractual Life	9 years 1 month 9 days

Equity Compensation Plan - Estimated Fair Value of The Option Award (Details) - $ / shares	Feb. 24, 2022	Feb. 15, 2022	Nov. 26, 2021	Aug. 05, 2021	May 17, 2021	May 04, 2021	Feb. 25, 2021	Feb. 16, 2021	Aug. 27, 2020	Feb. 27, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Expected volatility		39.43%						50.86%
Risk-free interest rate		4.26%						0.22%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Fair-value at grant date (per share)	$ 39.07	$ 38.86	$ 36.53	$ 29.78	$ 33.53	$ 30.32	$ 27.46		$ 18.67	$ 13.64
Average expected term	6 years	6 years	5 years 7 months 6 days	6 years	6 years	6 years	6 years		6 years	6 years
Expected volatility	39.88%	39.85%	39.51%	40.65%	40.46%	40.37%	40.29%		39.51%	31.53%
Risk-free interest rate	1.89%	1.99%	0.42%	0.87%	1.07%	1.05%	1.02%		0.42%	1.17%
Expected dividend yield	1.05%	1.06%	1.74%	1.26%	1.14%	1.24%	1.35%		1.74%	1.93%

Equity Compensation Plan - Summary of Option Activity Under Plan (Details)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Stock Options Outstanding
Beginning balance (in shares) \| shares	155,036
Granted (in shares) \| shares	57,018
Exercised (in shares) \| shares	(17,648)
Forfeitured (in shares) \| shares	(9,476)
Ending balance (in shares) \| shares	184,930
Weighted Average Exercise Price
Beginning balance (in dollars per share) \| $ / shares	$ 70.46
Granted (in dollars per share) \| $ / shares	106.54
Exercised (in dollars per share) \| $ / shares	59.25
Forfeitured (in dollars per share) \| $ / shares	76.91
Ending balance (in dollars per share) \| $ / shares	$ 82.32

Equity Compensation Plan - Schedule of Intrinsic Value Related to Stock Options (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Payment Arrangement [Abstract]
Options outstanding	$ 4.9	$ 6.1	$ 4.0
Options exercisable	$ 2.4	$ 1.3	$ 0.6

Equity Compensation Plan - Schedule of Equity Based Compensation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Payment Arrangement [Abstract]
Compensation expense	$ 6.0	$ 5.0	$ 5.4
Related income tax benefit	$ 1.6	$ 1.4	$ 1.4

Business Segment Information - Additional Information (Detail) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Schedule Of Assets By Segment
Number of operating segments \| segment									2
Total third-party sales	$ 271.9	$ 280.1	$ 277.1	$ 270.1	$ 212.7	$ 209.7	$ 218.8	$ 199.2	$ 1,099.2	$ 840.4	$ 800.0
General industrial
Schedule Of Assets By Segment
Total third-party sales									190.7	187.5	163.6
Medium-duty/heavy-duty truck
Schedule Of Assets By Segment
Total third-party sales									191.2	174.3	241.7
Customer One
Schedule Of Assets By Segment
Total third-party sales									$ 296.5	$ 166.4	$ 132.3

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Business Segment Information - Schedule of Segment Operating Results and Other Financial Data (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Total third-party sales	$ 271.9	$ 280.1	$ 277.1	$ 270.1	$ 212.7	$ 209.7	$ 218.8	$ 199.2	$ 1,099.2	$ 840.4	$ 800.0
Income (loss) from continuing operations before income taxes									28.3	66.0	(23.5)
Acquisition and divestiture expenses									0.5	0.4	9.6
Acquisition and divestiture expenses									(0.6)	5.3	2.9
Amortization of fair value adjustment to acquisition date inventory									13.3	9.9	3.0
Restructuring and impairment expense									1.9	2.4	14.3
Depreciation and amortization expense									102.8	63.5	56.5
Interest expense, net									33.9	13.7	14.9
Goodwill impairment									65.2	0.0	0.0
Other income (expense), net									(10.0)	14.3	(37.7)
Adjusted Segment EBITDA									300.6	215.1	178.6
Sealing Technologies
Segment Reporting Information
Total third-party sales									623.4	593.2	628.9
Goodwill impairment									0.0
Advanced Surface Technologies
Segment Reporting Information
Total third-party sales									475.8	247.2	171.1
Goodwill impairment									65.2
Operating Segments
Segment Reporting Information
Total third-party sales									1,100.4	847.1	807.9
Operating Segments \| Sealing Technologies
Segment Reporting Information
Total third-party sales									624.3	599.8	636.7
Adjusted Segment EBITDA									159.1	141.9	131.5
Operating Segments \| Advanced Surface Technologies
Segment Reporting Information
Total third-party sales									476.1	247.3	171.2
Adjusted Segment EBITDA									141.5	73.2	47.1
Intersegment sales
Segment Reporting Information
Total third-party sales									(1.2)	(6.7)	(7.9)
Corporate
Segment Reporting Information
Corporate expenses									47.0	64.9	41.4
Segment Reconciling Items
Segment Reporting Information
Other income (expense), net									$ 8.3	$ (11.0)	$ 59.5

Business Segment Information - Schedule of Net Sales by Geographical Area (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Total third-party sales	$ 271.9	$ 280.1	$ 277.1	$ 270.1	$ 212.7	$ 209.7	$ 218.8	$ 199.2	$ 1,099.2	$ 840.4	$ 800.0
United States
Segment Reporting Information
Total third-party sales									687.4	445.7	477.7
Europe
Segment Reporting Information
Total third-party sales									139.7	132.7	117.5
Other foreign
Segment Reporting Information
Total third-party sales									$ 272.1	$ 262.0	$ 204.8

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Business Segment Information - Third Party Sales by Major End Market (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue
Total third-party sales	$ 271.9	$ 280.1	$ 277.1	$ 270.1	$ 212.7	$ 209.7	$ 218.8	$ 199.2	$ 1,099.2	$ 840.4	$ 800.0
Aerospace
Disaggregation of Revenue
Total third-party sales									47.3	41.9	43.5
Chemical and material processing
Disaggregation of Revenue
Total third-party sales									77.6	72.5	53.0
Food and pharmaceutical
Disaggregation of Revenue
Total third-party sales									70.8	65.1	52.3
General industrial
Disaggregation of Revenue
Total third-party sales									190.7	187.5	163.6
Medium-duty/heavy-duty truck
Disaggregation of Revenue
Total third-party sales									191.2	174.3	241.7
Oil and gas
Disaggregation of Revenue
Total third-party sales									26.6	23.6	22.6
Power generation
Disaggregation of Revenue
Total third-party sales									43.2	43.8	43.6
Semiconductors
Disaggregation of Revenue
Total third-party sales									437.0	218.2	171.7
Other
Disaggregation of Revenue
Total third-party sales									14.8	13.5	8.0
Sealing Technologies
Disaggregation of Revenue
Total third-party sales									623.4	593.2	628.9
Sealing Technologies \| Aerospace
Disaggregation of Revenue
Total third-party sales									41.2	32.1	35.5
Sealing Technologies \| Chemical and material processing
Disaggregation of Revenue
Total third-party sales									77.6	72.5	53.0
Sealing Technologies \| Food and pharmaceutical
Disaggregation of Revenue
Total third-party sales									70.8	65.1	52.3
Sealing Technologies \| General industrial
Disaggregation of Revenue
Total third-party sales									162.3	161.8	160.7
Sealing Technologies \| Medium-duty/heavy-duty truck
Disaggregation of Revenue
Total third-party sales									191.2	174.3	241.7
Sealing Technologies \| Oil and gas
Disaggregation of Revenue
Total third-party sales									21.4	19.0	20.5
Sealing Technologies \| Power generation
Disaggregation of Revenue
Total third-party sales									43.1	43.6	43.6
Sealing Technologies \| Semiconductors
Disaggregation of Revenue
Total third-party sales									6.1	14.6	14.6
Sealing Technologies \| Other
Disaggregation of Revenue
Total third-party sales									9.7	10.2	7.0
Advanced Surface Technologies
Disaggregation of Revenue
Total third-party sales									475.8	247.2	171.1
Advanced Surface Technologies \| Aerospace
Disaggregation of Revenue
Total third-party sales									6.1	9.8	8.0
Advanced Surface Technologies \| Chemical and material processing
Disaggregation of Revenue
Total third-party sales									0.0	0.0	0.0
Advanced Surface Technologies \| Food and pharmaceutical
Disaggregation of Revenue
Total third-party sales									0.0	0.0	0.0
Advanced Surface Technologies \| General industrial
Disaggregation of Revenue
Total third-party sales									28.4	25.7	2.9
Advanced Surface Technologies \| Medium-duty/heavy-duty truck
Disaggregation of Revenue
Total third-party sales									0.0	0.0	0.0
Advanced Surface Technologies \| Oil and gas
Disaggregation of Revenue
Total third-party sales									5.2	4.6	2.1
Advanced Surface Technologies \| Power generation
Disaggregation of Revenue
Total third-party sales									0.1	0.2	0.0
Advanced Surface Technologies \| Semiconductors
Disaggregation of Revenue
Total third-party sales									430.9	203.6	157.1
Advanced Surface Technologies \| Other
Disaggregation of Revenue
Total third-party sales									$ 5.1	$ 3.3	$ 1.0

Business Segment Information - Schedule of Segment Related Capital Expenditure, Depreciation and Amortization on those Expenditures (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets
Capital Expenditures	$ 29.4	$ 14.9	$ 13.4
Depreciation and amortization expense	103.1	63.8	56.6
Operating Segments \| Sealing Technologies
Revenues from External Customers and Long-Lived Assets
Capital Expenditures	8.2	6.3	8.0
Depreciation and amortization expense	26.1	30.6	36.5
Operating Segments \| Advanced Surface Technologies
Revenues from External Customers and Long-Lived Assets
Capital Expenditures	21.2	8.6	5.3
Depreciation and amortization expense	76.7	32.9	20.0
Corporate
Revenues from External Customers and Long-Lived Assets
Capital Expenditures	0.0	0.0	0.1
Depreciation and amortization expense	$ 0.3	$ 0.3	$ 0.1

Business Segment Information - Schedule of Assets and Long Lived Assets Segment (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets
Assets	$ 2,647.8	$ 2,974.6
Long-Lived Assets	185.2	184.3
Discontinued Operations
Revenues from External Customers and Long-Lived Assets
Assets	15.9	149.9
United States
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	152.7	150.6
France
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	7.4	6.6
Other Europe
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	0.9	1.4
Other foreign
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	24.2	25.7
Operating Segments \| Sealing Technologies
Revenues from External Customers and Long-Lived Assets
Assets	689.6	703.9
Operating Segments \| Advanced Surface Technologies
Revenues from External Customers and Long-Lived Assets
Assets	1,519.6	1,686.5
Corporate
Revenues from External Customers and Long-Lived Assets
Assets	$ 422.7	$ 434.3

Commitments and Contingencies - Narrative (Details)						9 Months Ended	12 Months Ended
Commitments and Contingencies - Narrative (Details)	Apr. 14, 2021 USD ($) mi	Jun. 30, 2018 party	Oct. 31, 2016 USD ($)	Mar. 03, 2016 USD ($)	Apr. 11, 2014 USD ($) mi	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) site mine mi	Dec. 31, 2021 USD ($)	Oct. 18, 2021	Apr. 30, 2015 USD ($)
Site Contingency
Number of sites subject to remediation \| site							19
Number of sites subject to remediation activities, cost in excess of 100K \| site							12
Cost per site minimis threshold							$ 100,000
Number of sites subject to remediation activities, discontinued operations \| site							18
Number of sites subject to remediation activities, active operations \| site							1
Number of sites, investigation completed \| site							16
Number of sites investigation in progress \| site							3
Environmental							$ 42,100,000	$ 46,600,000
Environmental, current							$ 10,400,000
Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag							Consolidated Balance Sheets
Loss reserves							$ 28,700,000
Lower Passaic River Study Area
Site Contingency
Portion of site subject to remediation \| mi					8
Number of potentially responsible parties \| site							70
Estimate of cost										$ 726,000,000
Estimate low end			$ 165,000,000
Development period (years)			4 years
Potentially responsible parties \| party		120
Upper Nine Miles Of The River
Site Contingency
Portion of site subject to remediation \| mi	9
Estimate of loss exposure in excess of accrual	$ 441,000,000
Lower Passaic River Study Area, Lower Eight Miles
Site Contingency
Environmental							$ 700,000
Accrual payments						$ 5,900,000
Arizona Uranium Mines
Site Contingency
Environmental							$ 12,700,000
Investigate sites notice from EPA \| mine							8
Percentage of expenses reimbursable by the U.S.									35.00%
Future contributions from U.S.							$ 3,300,000
Water Valley, Mississippi
Site Contingency
Loss reserves							$ 14,600,000
Minimum \| Lower Passaic River Study Area
Site Contingency
Estimate of loss exposure in excess of accrual				$ 1,380,000,000	$ 953,000,000
Maximum \| Lower Passaic River Study Area
Site Contingency
Estimate of loss exposure in excess of accrual				$ 1,730,000,000
Affiliated Entity \| Crucible Steel Corporation
Site Contingency
Number of sites subject to remediation \| site							19
Portion of site subject to remediation \| mi							17

Commitments and Contingencies - Schedule of Changes in Carrying Amount of Product Warranty Liability (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement in Standard Product Warranty Accrual
Balance at beginning of year	$ 4.9	$ 6.7	$ 10.1
Charges to expense	2.2	0.7	1.4
Settlements made	(1.9)	(2.5)	(4.8)
Balance at end of year	$ 5.2	$ 4.9	$ 6.7

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 271.9	$ 280.1	$ 277.1	$ 270.1	$ 212.7	$ 209.7	$ 218.8	$ 199.2	$ 1,099.2	$ 840.4	$ 800.0
Gross profit	105.5	110.8	112.3	94.7	78.7	83.7	87.2	78.5	423.3	328.1	285.5
Income (loss) from continuing operations	(61.1)	26.8	26.0	12.2	(1.3)	24.1	23.4	11.1	3.9	57.3	(21.0)
Income from discontinued operations	184.5	0.7	8.3	4.9	104.1	3.9	6.0	7.0	198.4	121.0	199.0
Net income	$ 123.4	$ 27.5	$ 34.3	$ 17.1	$ 102.8	$ 28.0	$ 29.4	$ 18.1	$ 202.3	$ 178.3	$ 178.0
Basic earnings (loss) per share:
Continuing operations (in dollars per share)	$ (2,760,000)	$ 1,260,000	$ 1,250,000	$ 570,000	$ (80,000.00)	$ 1,170,000	$ 1,140,000	$ 530,000	$ 0.32	$ 2.76	$ (1.05)
Discontinued operations (in dollars per share)	8,870,000	30,000.00	400,000	240,000	5,050,000.00	190,000	290,000	340,000	9.54	5.88	9.69
Net income per share (in dollars per share)	6,110,000	1,290,000	1,650,000	810,000	4,970,000	1,360,000	1,430,000	870,000	9.86	8.64	8.64
Diluted earnings (loss) per share:
Continuing operations (in dollars per share)	(2,760,000)	1,260,000	1,250,000	570,000	(80,000.00)	1,160,000	1,130,000	530,000	0.32	2.74	(1.05)
Discontinued operations (in dollars per share)	8,870,000	30,000.00	400,000	240,000	5,050,000.00	190,000	290,000	340,000	9.51	5.83	9.69
Net income per share (in dollars per share)	$ 6,110,000	$ 1,290,000	$ 1,650,000	$ 810,000	$ 4,970,000	$ 1,350,000	$ 1,420,000	$ 870,000	$ 9.83	$ 8.57	$ 8.64

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves
Balance, Beginning of Year	$ 2.1	$ 1.8	$ 1.5
Charge to Expense	1.0	0.1	0.8
Write-off of Receivables and Divestitures	(0.2)	(0.2)	(0.3)
Other	0.0	0.4	(0.2)
Balance, End of Year	2.9	2.1	1.8
Deferred Income Tax Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves
Balance, Beginning of Year	8.9	6.6	7.0
Charge to Expense	2.3	2.6	1.1
Write-off of Receivables and Divestitures	0.0	0.0	(1.7)
Other	(0.5)	(0.3)	0.2
Balance, End of Year	$ 10.7	$ 8.9	$ 6.6