10,922.6

11,189.5

Restricted assets held by special purpose entities

7,270.5

7,285.6

Intangibles, net

3,749.4

4,059.5

1,269.2

1,274.3

Prepaid pension asset

305.9

224.7

Other assets

1,754.1

1,148.8

Total Assets

30,277.6

30,156.7

Current liabilities:

Current portion of debt

213.1

561.1

Accounts payable

1,513.5

1,831.8

Accrued compensation and benefits

377.2

470.4

Other current liabilities

683.1

571.8

Total current liabilities

2,786.9

3,435.1

Long-term debt due after one year

9,840.3

9,502.3

Pension liabilities, net of current portion

271.3

294.0

Postretirement benefit liabilities, net of current portion

151.9

162.1

Non-recourse liabilities held by special purpose entities

1,138.7

1,145.2

2,888.2

2,878.0

Commitments and contingencies (Note 14)

1,468.8

1,053.9

Redeemable noncontrolling interests

1.6

1.9

Equity:

Preferred stock, $0.01 par value; 30.0 million shares authorized; no shares outstanding

0.0

Common Stock, $0.01 par value; 600.0 million shares authorized; 259.5 million and 257.8 million shares outstanding at June 30, 2020 and September 30, 2019, respectively

2.6

Capital in excess of par value

10,857.6

10,739.4

Retained earnings

2,240.3

1,997.1

Accumulated other comprehensive loss

^[1]

(1,387.4)

(1,069.2)

Total stockholders’ equity

11,713.1

11,669.9

Noncontrolling interests

16.8

14.3

Total equity

11,729.9

11,684.2

Total Liabilities and Equity

$ 30,277.6

$ 30,156.7

[1]	All amounts are net of tax and noncontrolling interests.

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019
Statement Of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 72.0	$ 53.2
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	30,000,000.0	30,000,000.0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	600,000,000.0	600,000,000.0
Common Stock, Shares, Outstanding	259,500,000	257,800,000

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($)
shares in Millions, $ in Millions

Total

Common Stock [Member]

Capital in Excess of Par Value [Member]

Retained Earnings [Member]

AOCI Attributable to Parent

Noncontrolling Interests [Member]

Beginning balance at Sep. 30, 2018

253.5

Beginning balance at Sep. 30, 2018

$ 2.5

$ 10,588.9

$ 1,573.3

$ (695.3)

$ 13.0

^[1]

Shares issued under restricted stock plan

3.0

Distributions and adjustments to noncontrolling interests

$ (3.4)

2.3

^[1]

Contributions

^[1]

0.2

^[1]

(1.9)

Adoption of accounting standards

^[2]

43.5

Dividends declared (per share - $0.20, $0.455, $1.13 and $1.365)

552.1

^[3]

(361.0)

Issuance of common stock, net of stock received for minimum tax withholdings

52.0

^[4]

2.9

Fair value of share-based awards issued in business combinations

70.8

Purchases of common stock

(2.1)

Issuance of common stock, net of stock received for minimum tax withholdings

257.3

$ 0.1

^[4]

89.9

^[4]

(0.4)

Purchases of common stock

(86.2)

(2.4)

$ (0.1)

^[5]

(0.1)

Total Stockholders’ equity at Jun. 30, 2019

11,841.3

$ 2.6

10,715.4

1,805.1

(695.4)

13.6

^[1]

11,827.7

Beginning balance at Mar. 31, 2019

256.9

Beginning balance at Mar. 31, 2019

$ 2.6

10,692.5

1,671.2

(725.5)

12.8

^[1]

Distributions and adjustments to noncontrolling interests

(1.2)

0.9

^[1]

^[1]

(0.1)

Dividends declared (per share - $0.20, $0.455, $1.13 and $1.365)

252.6

^[3]

(118.7)

Issuance of common stock, net of stock received for minimum tax withholdings

15.9

^[4]

0.4

Issuance of common stock, net of stock received for minimum tax withholdings

257.3

^[4]

7.0

30.1

Total Stockholders’ equity at Jun. 30, 2019

11,841.3

$ 2.6

10,715.4

1,805.1

(695.4)

13.6

^[1]

$ 11,827.7

Beginning balance at Sep. 30, 2019

257.8

Total Stockholders' equity at Sep. 30, 2019

$ 11,669.9

Beginning balance at Sep. 30, 2019

11,684.2

$ 2.6

10,739.4

1,997.1

(1,069.2)

14.3

^[1]

Shares issued under restricted stock plan

0.9

Adoption of new standard and reclassification of stranded tax effects resulting from Tax Reform

(3.3)

2.5

^[1]

^[5]

$ (73.4)

Adoption of new standard and reclassification of stranded tax effects resulting from Tax Reform | ASU 2018-02 [Member]

(73.4)

Adoption of accounting standards

^[2]

73.5

Dividends declared (per share - $0.20, $0.455, $1.13 and $1.365)

465.1

^[3]

(295.4)

Issuance of common stock, net of stock received for minimum tax withholdings

98.4

^[4]

0.8

Purchases of common stock

0.0

Issuance of common stock, net of stock received for minimum tax withholdings

259.5

^[4]

19.8

$ (244.8)

^[5]

(244.8)

Total Stockholders’ equity at Jun. 30, 2020

11,729.9

$ 2.6

10,857.6

2,240.3

(1,387.4)

16.8

^[1]

11,713.1

Beginning balance at Mar. 31, 2020

259.2

Beginning balance at Mar. 31, 2020

$ 2.6

10,784.4

2,114.4

(1,419.0)

15.6

^[1]

Shares issued under restricted stock plan

0.1

$ (1.5)

1.2

^[1]

Dividends declared (per share - $0.20, $0.455, $1.13 and $1.365)

178.5

^[3]

(52.6)

Issuance of common stock, net of stock received for minimum tax withholdings

68.9

^[4]

0.2

Issuance of common stock, net of stock received for minimum tax withholdings

259.5

^[4]

4.3

31.6

Total Stockholders’ equity at Jun. 30, 2020

$ 11,729.9

$ 2.6

$ 10,857.6

$ 2,240.3

$ (1,387.4)

$ 16.8

^[1]

$ 11,713.1

[1]	Excludes amounts related to contingently redeemable noncontrolling interests, which are separately classified outside of permanent equity on the Condensed Consolidated Balance Sheets.
[2]	For fiscal 2020, the amount primarily relates to the adoption of ASU 2018-02 (as hereinafter defined). For fiscal 2019, the amount relates to the adoption of ASC 606 (as hereinafter defined).
[3]	Includes cash dividends paid and dividend equivalent units on certain restricted stock awards.
[4]	Included in the issuance of common stock in the nine months ended June 30, 2019 is the issuance of approximately 1.6 million shares of Common Stock (as hereinafter defined) valued at $70.1 million in connection with the KapStone Acquisition (as hereinafter defined).
[5]	All amounts are net of tax and noncontrolling interests.

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) shares in Millions, $ in Millions	9 Months Ended
	Jun. 30, 2019 USD ($) $ / shares shares
Cash dividends paid per share \| $ / shares	$ 1.365
KapStone [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares \| shares	1.6
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable \| $	$ 70.1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Consolidated net income	$ 468.4	$ 555.5
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation, depletion and amortization	1,121.4	1,128.1
Cost of real estate sold	16.1	17.3
Deferred income tax expense	16.1	36.4
Share-based compensation expense	98.4	51.3
Pension and other postretirement funding more than expense (income)	(60.7)	(44.3)
Multiemployer pension withdrawal income	(1.1)	(1.7)
Land and Development impairments		13.0
Other impairment adjustments	2.2	10.5
Gain on disposal of plant and equipment and other, net	(5.5)	(39.2)
Other, net	(33.4)	(61.5)
Change in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	82.4	93.9
Inventories	(70.7)	(39.5)
Other assets	(98.3)	(171.7)
Accounts payable	(240.1)	(126.3)
Income taxes	15.7	(29.5)
Accrued liabilities and other	28.1	7.3
Net cash provided by operating activities	1,339.0	1,399.6
Investing activities:
Capital expenditures	(860.2)	(976.8)
Cash paid related to business combinations, net of cash acquired		(3,368.3)
Investment in unconsolidated entities	(1.0)	(10.4)
Proceeds from sale of property, plant and equipment	22.5	108.3
Proceeds from property, plant and equipment insurance settlement	2.4	16.5
Other, net	10.9	30.0
Net cash used for investing activities	(825.4)	(4,200.7)
Financing activities:
Proceeds from issuance of notes	598.6	2,498.2
Additions to revolving credit facilities	413.0	192.2
Repayments of revolving credit facilities	(478.2)	(177.2)
Additions to debt	683.1	4,441.0
Repayments of debt	(1,195.8)	(4,665.0)
(Repayments) additions to commercial paper, net	(9.3)	445.6
Other debt (repayments) additions, net	(69.2)	45.9
Issuances of common stock, net of related minimum tax withholdings	16.7	8.6
Purchases of common stock		(88.6)
Cash dividends paid to stockholders	(292.6)	(350.7)
Cash distributions paid to noncontrolling interests	(1.4)	(3.4)
Other, net	(17.0)	(7.1)
Net cash (used for) provided by financing activities	(352.1)	2,339.5
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(21.6)	3.9
Increase (decrease) in cash, cash equivalents and restricted cash	139.9	(457.7)
Cash, cash equivalents and restricted cash at beginning of period	151.6	636.8
Cash, cash equivalents and restricted cash at end of period	291.5	179.1
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	90.9	178.1
Interest, net of amounts capitalized	$ 251.4	$ 249.9

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) $ in Millions	Jun. 30, 2019 USD ($)
Statement Of Cash Flows [Abstract]
Fair value of assets acquired, including goodwill	$ 5,943.9
Cash consideration for the purchase of businesses, net of cash acquired	(3,369.2)
Stock issued for the purchase of a business	(70.1)
Fair value of share-based awards issued in the purchase of a business	(70.8)
Deferred payments and unpaid working capital	16.6
Liabilities assumed	$ 2,450.4

Basis of Presentation and Significant Accounting Policies

9 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

Note 1.

Basis of Presentation and Significant Accounting Policies

Basis of Presentation

Our independent registered public accounting firm has not audited our accompanying interim financial statements. We derived the condensed consolidated balance sheet at September 30, 2019 from the audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019 (the “Fiscal 2019 Form 10-K”). In the opinion of our management, the condensed consolidated financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of our statements of income for the three and nine months ended June 30, 2020 and June 30, 2019, our statements of comprehensive income for the three and nine months ended June 30, 2020 and June 30, 2019, our balance sheets at June 30, 2020 and September 30, 2019, our statements of cash flows for the nine months ended June 30, 2020 and June 30, 2019, and our statements of equity for the three and nine months ended June 30, 2020 and June 30, 2019.

We have condensed or omitted certain notes and other information from the interim financial statements presented in this report. Therefore, these interim financial statements should be read in conjunction with the Fiscal 2019 Form 10-K. The results for the three and nine months ended June 30, 2020 are not necessarily indicative of results that may be expected for the full year.

Reclassifications and Adjustments

During fiscal 2020, we evaluated our revolving credit facilities and determined that the borrowings and repayments for certain facilities should be presented gross instead of net on the condensed consolidated statements of cash flow and corrected the presentation of the prior year by an immaterial amount.

COVID-19 Pandemic

The global impact of the COVID-19 pandemic (“COVID-19”) continues to evolve rapidly. The pandemic has affected our operational and financial performance and the extent of its effect on our operational and financial performance will continue to depend on future developments, which are highly uncertain and cannot be predicted with confidence, including the duration, scope and severity of the pandemic, the actions taken to contain or mitigate its impact, and the direct and indirect economic effects of the pandemic and related containment measures, among others.

At June 30, 2020, we evaluated the current economic environment, including our current assessment of the impact of COVID-19, and there were no indicators of impairment of our long-lived assets, including goodwill that required a quantitative test to be performed. Our estimates involve numerous assumptions about the future growth and potential volatility in revenues and costs, capital expenditures, industry and global economic factors, interest rate environment and future business strategy. Accordingly, our accounting estimates may materially change from period to period due to changing market factors, including those driven by COVID-19. We will continue to monitor future events, changes in circumstances and the potential impact thereof, including performing our annual goodwill impairment assessment in the fourth quarter of fiscal 2020. If actual results are not consistent with our assumptions and estimates, we may be exposed to impairment losses that could be material. See “Note 1. Description of Business and Summary of Significant Accounting Policies — Goodwill and

Long-Lived Assets” in the Fiscal 2019 Form 10-K for additional information regarding the results of, and our methods and assumptions applied to perform, our goodwill impairment testing in fiscal 2019.

Significant Accounting Policies

See “Note 1. Description of Business and Summary of Significant Accounting Policies” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for a summary of our significant accounting policies.

Recent Accounting Developments

New Accounting Standards — Recently Adopted

In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”. The amendments in this update provide financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in the period of adoption or retrospectively in each period in which the effect of the change in the U.S. federal corporate income tax rate in the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”) (or portion thereof) is recorded. We adopted the provisions of this ASU on October 1, 2019. Upon adoption, we elected to reclassify stranded tax effects of the Tax Act within accumulated other comprehensive income to retained earnings. The reclassification of stranded tax effects from accumulated other comprehensive income increased retained earnings by $73.4 million, all of which related to our employee benefit plans.

In February 2016, the FASB issued ASU 2016-02 “Leases”, which is codified in Accounting Standards Codification (“ASC”) 842 “Leases” (“ASC 842”) and supersedes current lease guidance in ASC 840 “Leases”. This ASU requires lessees to put a ROU asset and lease liability on their balance sheet for operating and financing leases that have a term of more than one year. Expense will be recognized in the income statement similar to current accounting guidance. For lessors, this ASU modifies the classification criteria and the accounting for sales-type and direct financing leases. Entities need to disclose qualitative and quantitative information about their leases, including characteristics and amounts recognized in the financial statements. We adopted the provisions of ASC 842 on October 1, 2019 using the modified retrospective approach and, as a result, did not restate prior periods. See “Note 13. Leases” for additional details.

New Accounting Standards — Recently Issued

See “Note 1. Description of Business and Summary of Significant Accounting Policies — New Accounting Standards — Recently Issued” of the Notes to Consolidated Financial Statements section of the Fiscal 2019 Form 10-K for information on new accounting standards issued prior to the beginning of fiscal 2020 but not yet adopted and where we do not expect that the adoption will have a material impact on our consolidated financial statements. Below is a description of new accounting standards for which we (i) are in the process of evaluating the impact on our consolidated financial statements, (ii) have determined that the new standard could have a material impact on our consolidated financial statements or (iii) have determined since the Fiscal 2019 Form 10-K that we do not expect the adoption of the new standard will have a material impact on our consolidated financial statements. We have not elected to early adopt any of the new accounting standards described below to the extent early adoption is permitted.

In March 2020, the FASB issued ASU 2020-04 “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting”. This ASU provides temporary optional expedients and exceptions for applying Generally Accepted Accounting Principles (“GAAP”) guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate. The ASU can be adopted after its issuance date through December 31, 2022. We are currently evaluating the impact of this ASU.

In December 2019, the FASB issued ASU 2019-12 “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes”. This ASU simplifies the accounting for income taxes by removing certain exceptions to the

general principles in Topic 740 under GAAP. This ASU also improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective for fiscal years beginning after December 15, 2020 (fiscal 2022 for us) and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of this ASU.

In October 2018, the FASB issued ASU 2018-17 “Consolidation: Targeted Improvements to Related Party Guidance for Variable Interest Entities.” This ASU changes how entities evaluate decision-making fees under the variable interest entity guidance. To determine whether decision-making fees represent a variable interest, an entity considers indirect interests held through related parties under common control on a proportionate basis, rather than in their entirety, as currently required under GAAP. This ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us) and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

In October 2018, the FASB issued ASU 2018-18 “Collaborative Arrangements (Topic 808): Clarifying the Interaction Between Topic 808 and Topic 606”, which provides targeted amendments to ASC 808, “Collaborative

arrangements” (“ASC 808”) and ASC 606 “Revenue from Contracts with Customers” (“ASC 606”). The amendments in this ASU require transactions between participants in a collaborative arrangement to be accounted for under ASC 606 when the counterparty is a customer. This ASU precludes an entity from presenting consideration from a transaction in a collaborative arrangement as revenue from contracts with customers if the counterparty is not a customer for that transaction. This ASU also amends ASC 808 to refer to the unit-of-account guidance in ASC 606 and requires it to be used only when assessing whether a transaction is in scope of ASC 606. This ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us) and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15 “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract”. The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by these amendments. The provisions may be adopted prospectively or retrospectively. This ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us), and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-14 “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans”. The amendments in this ASU modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans to remove disclosures that no longer are considered cost beneficial, clarify the specific requirements of disclosures and add disclosure requirements identified as relevant. These provisions will be applied retrospectively. This ASU is effective for fiscal years ending after December 15, 2020 (fiscal 2021 for us). Early adoption is permitted. We are currently evaluating the impact of this ASU.

In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment”, which amends the guidance in ASC 350, “Intangibles Goodwill and Other”. The ASU eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. The ASU is effective for annual and interim impairment tests performed for fiscal years beginning after December 15, 2019 (fiscal 2021 for us). Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. The ASU is applied prospectively after adoption. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13 “Financial Instruments – Credit losses: Measurement of Credit Losses on financial Instruments (Topic 326)” (“ASU 2016-13”), which modifies the measurement of expected credit losses of certain financial instruments. The ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us), including interim periods within those fiscal years, and will be applied as a cumulative effect adjustment to retained earnings as of the beginning of the first reporting period for which the guidance is

effective. In April 2019, the FASB issued ASU 2019-04 “Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” (“ASU 2019-04”), which addresses issues related to accrued interest receivable balances, recoveries, variable interest rates and prepayments, among other things. In May 2019, the FASB issued ASU 2019-05 “Financial Instruments – Credit Losses (Topic 326): Targeted Transition Relief” (“ASU 2019-05”), which provides targeted transition relief allowing entities to make an irrevocable one-time election upon adoption of the new credit losses standard to measure financial assets previously measured at amortized cost (except held-to-maturity securities) using the fair value option. In November 2019, the FASB issued ASU 2019-11 “Codification Improvements to Topic 326, Financial Instruments – Credit Losses” (“ASU 2019-11”), which makes certain narrow-scope amendments to Topic 326, including allowing entities to exclude accrued interest amounts from various required disclosures under Topic 326. In February 2020, the FASB issued ASU 2020-02 “Financial Instruments – Credit Losses (Topic 326) and Leases (Topic 842)” (“ASU 2020-02”), which adds and amends paragraphs in the Accounting Standards Codification to reflect the issuance of U.S. Securities and Exchange Commission (“SEC”) Staff Accounting Bulletin No. 119 primarily related to the new credit losses standard. The provisions of ASU 2019-04, ASU 2019-05, ASU 2019-11 and ASU 2020-02 related to Topic 326 are effective concurrent with the adoption of ASU 2016-13. While we are completing our analysis, we do not expect the adoption of these ASUs to have a material impact on our consolidated financial statements.

Revenue Recognition

9 Months Ended

Jun. 30, 2020

Revenue From Contract With Customer [Abstract]

Revenue Recognition

Note 2.

Revenue Recognition

Disaggregated Revenue

ASC 606 requires that we disaggregate revenue from contracts with customers into categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The tables below disaggregate our revenue by geographical market and product type (segment). Net sales are attributed to geographical markets based on our selling location.

	Three Months Ended June 30, 2020
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	2,632.4	$	1,238.4	$	—	$	(44.8	)	$	3,826.0
South America		87.8		14.1		—		—			101.9
Europe		0.6		233.8		—		(0.2	)		234.2
Asia Pacific		8.0		66.3		—		(0.1	)		74.2
Total	$	2,728.8	$	1,552.6	$	—	$	(45.1	)	$	4,236.3

	Nine Months Ended June 30, 2020
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	8,187.0	$	3,718.8	$	18.9	$	(137.7	)	$	11,787.0
South America		296.1		52.9		—		—			349.0
Europe		4.9		731.8		—		(0.2	)		736.5
Asia Pacific		32.8		202.3		—		(0.3	)		234.8
Total	$	8,520.8	$	4,705.8	$	18.9	$	(138.2	)	$	13,107.3

	Three Months Ended June 30, 2019
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	2,954.6	$	1,306.0	$	8.6	$	(41.3	)	$	4,227.9
South America		102.8		14.8		—		—			117.6
Europe		0.7		259.3		—		(0.1	)		259.9
Asia Pacific		14.7		70.0		—		(0.1	)		84.6
Total	$	3,072.8	$	1,650.1	$	8.6	$	(41.5	)	$	4,690.0

	Nine Months Ended June 30, 2019
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	8,426.3	$	3,870.7	$	23.3	$	(119.0	)	$	12,201.3
South America		321.2		52.2		—		—			373.4
Europe		0.7		789.4		—		(0.1	)		790.0
Asia Pacific		49.1		224.9		—		(1.3	)		272.7
Total	$	8,797.3	$	4,937.2	$	23.3	$	(120.4	)	$	13,637.4

Revenue Contract Balances

Contract assets are rights to consideration in exchange for goods that we have transferred to a customer when that right is conditional on something other than the passage of time. Contract assets are reduced when title and risk of loss passes to the customer. Contract liabilities represent obligations to transfer goods or services to a customer for which we have received consideration. Contract liabilities are reduced once control of the goods is transferred to the customer.

The opening and closing balances of our contract assets and contract liabilities are as follows. Contract assets and contract liabilities are aggregated within Other current assets and Other current liabilities, respectively, on the condensed consolidated balance sheet.

(In millions)	Contract Assets (Short-Term)		Contract Liabilities (Short-Term)

Beginning balance - October 1, 2019	$	188.0	$	7.7
Ending balance - June 30, 2020		202.0		16.9
Increase / (Decrease)	$	14.0	$	9.2

Acquisitions

9 Months Ended

Jun. 30, 2020

Business Combinations [Abstract]

Acquisitions

Note 3.

Acquisitions

We account for acquisitions in accordance with ASC 805, “Business Combinations”. The estimated fair values of all assets acquired and liabilities assumed in acquisitions are provisional and may be revised as a result of additional information obtained during the measurement period of up to one year from the acquisition date. See “Note 3. Acquisitions and Investment” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for information about our prior year acquisitions and investments. For the three and nine months ended June 30, 2020, no changes to our fiscal 2019 provisional fair value estimates of assets and liabilities assumed in acquisitions, where the measurement period was open at the beginning of the fiscal year, have been significant. The measurement periods for all prior acquisitions are closed.

KapStone Acquisition

On November 2, 2018, pursuant to the Agreement and Plan of Merger (the “Merger Agreement”), dated as of January 28, 2018, among WRKCo Inc. (formerly known as WestRock Company), which we refer to as “WRKCo”, KapStone Paper and Packaging Corporation (“KapStone”), the Company (formerly known as Whiskey Holdco, Inc.), Whiskey Merger Sub, Inc. and Kola Merger Sub, Inc., the Company acquired all of the outstanding shares of KapStone through a transaction in which: (i) Whiskey Merger Sub, Inc. merged with and into WRKCo, with WRKCo surviving the merger as a wholly owned subsidiary of the Company and (ii) Kola Merger Sub, Inc. merged with and into KapStone, with KapStone surviving the merger as a wholly owned subsidiary of the Company (collectively, the “KapStone Acquisition”). Effective as of the effective time of the KapStone Acquisition (the “Effective Time”), Whiskey Holdco, Inc. changed its name to “WestRock Company” and WRKCo changed its name to “WRKCo Inc.”

KapStone is a leading North American producer and distributor of containerboard, corrugated products and specialty papers, including liner and medium containerboard, kraft papers and saturating kraft. KapStone also owns Victory Packaging, a packaging solutions distribution company with facilities in the U.S., Canada and Mexico. We have included the financial results of KapStone in our Corrugated Packaging segment since the date of the KapStone Acquisition.

Pursuant to the KapStone Acquisition, at the Effective Time, (a) each issued and outstanding share of common stock, par value $0.01 per share, of WRKCo was converted into one share of common stock, par value $0.01 per share, of the Company (“Company common stock”) and (b) each issued and outstanding share of common stock, par value $0.0001 per share, of KapStone (“KapStone common stock”) (other than shares of KapStone common stock owned by (i) KapStone or any of its subsidiaries or (ii) any KapStone stockholder who properly exercised appraisal rights with respect to its shares of KapStone common stock in accordance with Section 262 of the Delaware General Corporation Law) was automatically canceled and converted into the right to receive (1) $35.00 per share in cash, without interest (the “Cash Consideration”), or, at the election of the holder of such share of KapStone common stock, (2) 0.4981 shares of Company common stock (the “Stock Consideration”) and cash in lieu of fractional shares, subject to proration procedures designed to ensure that the Stock Consideration would be received in respect of no more than 25% of the shares of KapStone common stock issued and outstanding immediately prior to the Effective Time (the “Maximum Stock Amount”). Each share of KapStone common stock in respect of which a valid election of Stock Consideration was not made by 5:00 p.m. New York City time on September 5, 2018 was converted into the right to receive the Cash Consideration. KapStone stockholders elected to receive Stock Consideration that was less than the Maximum Stock Amount and no proration was required.

The consideration for the KapStone Acquisition was $4.9 billion including debt assumed, a long-term financing obligation and assumed equity awards. As a result, KapStone stockholders received in the aggregate approximately $3.3 billion in cash and 1.6 million shares of WestRock common stock with a value of $70.1 million, or approximately 0.6% of the issued and outstanding shares of WestRock common stock immediately following the Effective Time. Pursuant to the Merger Agreement, at the Effective Time, the Company assumed any outstanding awards granted under the equity-based incentive plans of WRKCo and KapStone (including the shares underlying such awards), the award agreements evidencing the grants of such awards and, in the case of the WRKCo equity-based incentive plans, the remaining shares available for issuance under the applicable plan, in each case subject to adjustments to such awards in the manner set forth in the Merger Agreement. Included in the consideration was $70.8 million related to outstanding KapStone equity awards that were replaced with WestRock equity awards with identical terms for pre-combination service. The amount related to post-combination service will be expensed over the remaining service period of the awards.

The following table summarizes the fair values of the assets acquired and liabilities assumed in the KapStone Acquisition by major class of assets and liabilities as of the acquisition date, as well as adjustments made during fiscal 2019 and fiscal 2020 (referred to as “measurement period adjustments”) (in millions):

	Amounts Recognized as of the Acquisition Date		Measurement Period Adjustments ⁽¹⁾			Amounts Recognized as of Acquisition Date (as Adjusted)⁽²⁾
Cash and cash equivalents	$	8.6	$	—		$	8.6
Current assets, excluding cash and cash equivalents		878.9		(30.2	)		848.7
Property, plant and equipment, net		1,910.3		11.5			1,921.8
Goodwill		1,755.0		0.5			1,755.5
Intangible assets		1,336.1		30.3			1,366.4
Other long-term assets		27.9		(0.1	)		27.8
Total assets acquired		5,916.8		12.0			5,928.8

Current portion of debt		33.3		—			33.3
Current liabilities		337.5		7.9			345.4
Long-term debt due after one year		1,333.4		—			1,333.4
Accrued pension and other long-term benefits		9.8		2.8			12.6
Deferred income taxes		609.7		(1.4	)		608.3
Other long-term liabilities		118.4		2.7			121.1
Total liabilities assumed		2,442.1		12.0			2,454.1
Net assets acquired	$	3,474.7	$	—		$	3,474.7

⁽¹⁾	^{The measurement period adjustments recorded in fiscal 2019 and fiscal 2020 did not have a significant impact on our condensed consolidated statements of income in any period.}

⁽²⁾

^{The measurement period adjustments were primarily due to refinements to third party appraisals and carrying amounts of certain assets and liabilities, as well as adjustments to certain tax accounts based on, among other things, adjustments to deferred tax liabilities. The net impact of the measurement period adjustments to goodwill were essentially flat.}

The fair value assigned to goodwill is primarily attributable to buyer-specific synergies expected to arise after the KapStone Acquisition (e.g., enhanced geographic reach of the combined organization, increased vertical integration and other synergistic opportunities) and the assembled work force of KapStone, as well as from establishing deferred tax liabilities for the assets and liabilities acquired. The goodwill and intangible assets resulting from the KapStone Acquisition are not amortizable for tax purposes.

The following table summarizes the weighted average life and the fair value of intangible assets recognized in the KapStone Acquisition, excluding goodwill (in millions, except lives):

	Weighted Avg. Life		Gross Carrying Amount
Customer relationships		11.7	$	1,303.0
Trademarks and tradenames		16.9		54.2
Favorable contracts		6.0		9.2
Total		11.9	$	1,366.4

None of the intangible assets have significant residual value. The intangible assets are being amortized over estimated useful lives ranging from one to 20 years based on a straight-line basis because the amortization pattern was not reliably determinable.

Restructuring and Other Costs

9 Months Ended

Jun. 30, 2020

Restructuring And Other Costs [Abstract]

Restructuring and Other Costs

Note 4.

Restructuring and Other Costs

Summary of Restructuring and Other Initiatives

We recorded pre-tax restructuring and other costs of $9.7 million and $56.2 million for the three and nine months ended June 30, 2020 and $17.9 million and $107.1 million for the three and nine months ended June 30, 2019. These amounts are not comparable since the timing and scope of the individual actions associated with

each restructuring, acquisition, integration or divestiture can vary. We present our restructuring and other costs in more detail below.

The following table summarizes our Restructuring and other costs (in millions):

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Restructuring	$	7.4	$	6.4	$	40.1	$	56.4
Other		2.3		11.5		16.1		50.7
Restructuring and other costs	$	9.7	$	17.9	$	56.2	$	107.1

Restructuring

Our restructuring charges are primarily associated with restructuring portions of our operations (i.e. partial or complete plant closures), employee costs due to merger and acquisition-related workforce reductions, including voluntary retirement programs in fiscal 2019 and 2020. When we close a facility, if necessary, we recognize a write-down to reduce the carrying value of equipment or other property to their estimated fair value less cost to sell and record charges for severance and other employee-related costs. Any subsequent change in fair value less cost to sell prior to disposition is recognized as it is identified; however, no gain is recognized in excess of the cumulative loss previously recorded unless the actual selling price exceeds the original carrying value. At the time of each announced plant closure, we generally expect to record future period costs for equipment relocation, facility carrying costs, costs to terminate a lease or contract before the end of its term and employee-related costs.

Although specific circumstances vary, our strategy has generally been to consolidate our sales and operations into large well-equipped plants that operate at high utilization rates and take advantage of available capacity created by operational excellence initiatives and/or further optimize our system following mergers and acquisitions or a changing business environment. Therefore, we generally transfer a substantial portion of each closed plant’s assets and production to our other plants. We believe these actions have allowed us to more effectively manage our business. In our Land and Development segment, the restructuring charges primarily consisted of severance and other employee costs associated with the essentially completed accelerated monetization strategy and wind-down of operations and lease costs.

While restructuring costs are not charged to our segments and, therefore, do not reduce segment income, we highlight the segment to which the charges relate. The following table presents a summary of restructuring charges related to active restructuring initiatives that we incurred during the three and nine months ended June 30, 2020 and 2019, the cumulative recorded amount since we started the initiatives and our estimate of the total costs we expect to incur (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020		2019		Cumulative		Total Expected
Corrugated Packaging

Net property, plant and equipment costs	$	(0.3	)	$	(1.9	)	$	2.2	$	5.2	$	96.3	$	96.3
Severance and other employee costs		3.2			1.6			6.8		12.3		41.3		41.3
Equipment and inventory relocation costs		0.2			1.6			1.5		3.0		9.8		10.5
Facility carrying costs		0.4			0.6			1.4		2.6		19.9		20.6
Other costs		0.1			(0.1	)		0.5		0.2		5.7		5.9
Restructuring total	$	3.6		$	1.8		$	12.4	$	23.3	$	173.0	$	174.6

Consumer Packaging

Net property, plant and equipment costs	$	—		$	0.2		$	0.5	$	—	$	30.1	$	30.1
Severance and other employee costs		1.9			1.2			15.0		4.0		53.4		53.4
Equipment and inventory relocation costs		—			0.2			0.1		0.9		6.0		6.5
Facility carrying costs		—			0.2			—		0.2		1.9		1.9
Other costs		1.2			0.3			1.8		3.5		10.4		11.6
Restructuring total	$	3.1		$	2.1		$	17.4	$	8.6	$	101.8	$	103.5

Land and Development

Net property, plant and equipment costs	$	—		$	—		$	—	$	—	$	1.8	$	1.8
Severance and other employee costs		—			—			—		0.1		13.8		13.8
Other costs		—			—			—		—		3.0		3.0
Restructuring total	$	—		$	—		$	—	$	0.1	$	18.6	$	18.6

Corporate

Severance and other employee costs	$	0.1			2.4			9.0		22.2	$	47.3	$	47.3
Other costs		0.6			0.1			1.3		2.2		8.7		8.7
Restructuring total	$	0.7		$	2.5		$	10.3	$	24.4	$	56.0	$	56.0

Total

Net property, plant and equipment costs	$	(0.3	)	$	(1.7	)	$	2.7	$	5.2	$	128.2	$	128.2
Severance and other employee costs		5.2			5.2			30.8		38.6		155.8		155.8
Equipment and inventory relocation costs		0.2			1.8			1.6		3.9		15.8		17.0
Facility carrying costs		0.4			0.8			1.4		2.8		21.8		22.5
Other costs		1.9			0.3			3.6		5.9		27.8		29.2
Restructuring total	$	7.4		$	6.4		$	40.1	$	56.4	$	349.4	$	352.7

We have defined “Net property, plant and equipment costs” as used in this Note 4 as property, plant and equipment write-downs, subsequent adjustments to fair value for assets classified as held for sale, subsequent (gains) or losses on sales of property, plant and equipment and related parts and supplies on such assets, if any.

Other Costs

Our other costs consist of acquisition, integration and divestiture costs. We incur costs when we acquire or divest businesses. Acquisition costs include costs associated with transactions, whether consummated or not, such as advisory, legal, accounting and other professional or consulting fees, as well as potential litigation costs associated with those activities. We incur integration costs pre- and post-acquisition that reflect work being performed to facilitate merger and acquisition integration, such as work associated with information systems and other projects including spending to support future acquisitions, and primarily consist of professional services and labor. Divestiture costs consist primarily of similar professional fees. We consider acquisition, divestiture and integration costs to be Corporate costs regardless of the segment or segments involved in the transaction.

The following table presents our acquisition, integration and divestiture costs (in millions):

	Three Months Ended					Nine Months Ended
	June 30,					June 30,
	2020			2019		2020		2019
Acquisition costs	$	(0.2	)	$	0.9	$	0.2	$	27.9
Integration costs		2.5			10.6		15.9		22.6
Divestiture costs		—			—		—		0.2
Other total	$	2.3		$	11.5	$	16.1	$	50.7

The following table summarizes the changes in the restructuring accrual, which is primarily composed of accrued severance and other employee costs, and presents a reconciliation of the restructuring accrual charges to the line item “Restructuring and other costs” on our condensed consolidated statements of income (in millions):

	Nine Months Ended
	June 30,
	2020			2019
Accrual at beginning of fiscal year	$	32.3		$	31.6
Additional accruals		31.7			37.5
Payments		(35.3	)		(32.9	)
Adjustment to accruals		(1.1	)		(3.1	)
Foreign currency rate changes		—			0.1
Accrual at June 30	$	27.6		$	33.2

Reconciliation of accruals and charges to restructuring and other costs (in millions):

	Nine Months Ended
	June 30,
	2020			2019
Additional accruals and adjustments to accruals (see table above)	$	30.6		$	34.4
Acquisition costs		0.2			27.9
Integration costs		15.9			22.6
Divestiture costs		—			0.2
Net property, plant and equipment costs		2.7			5.2
Severance and other employee costs		(0.1	)		6.9
Equipment and inventory relocation costs		1.6			3.9
Facility carrying costs		1.4			2.8
Other costs		3.9			3.2
Total restructuring and other costs	$	56.2		$	107.1

Retirement Plans

9 Months Ended

Jun. 30, 2020

Retirement Plans [Abstract]

Retirement Plans

Note 5.

Retirement Plans

We have defined benefit pension plans and other postretirement benefit plans for certain U.S. and non-U.S. employees. Certain plans were frozen for salaried and non-union hourly employees at various times in the past, although some employees meeting certain criteria are still accruing benefits. In addition, we participate in several multiemployer pension plans (“MEPP” or “MEPPs”) that provide retirement benefits to certain union employees in accordance with various collective bargaining agreements. We also have supplemental executive retirement plans and other non-qualified defined benefit pension plans that provide unfunded supplemental retirement benefits to certain of our current and former executives. See “Note 5. Retirement Plans” and “Note 5. Retirement Plans — Multiemployer Plans” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for more information regarding our involvement with retirement plans and involvement with MEPPs.

MEPPs

In the normal course of business, we evaluate our potential exposure to MEPPs, including with respect to potential withdrawal liabilities. During fiscal 2018, we submitted formal notification to withdraw from the Pace Industry Union-Management Pension Fund (“PIUMPF”) and the Central States, Southeast and Southwest Areas Pension Plan, and recorded estimated withdrawal liabilities for each. It is reasonably possible that we may incur withdrawal liabilities with respect to certain other MEPPs in connection with such withdrawals. Our estimate of any such withdrawal liability, both individually and in the aggregate, is not material for the remaining plans in which we participate.

In September 2019, we received a demand from PIUMPF asserting that we owe $170.3 million on an undiscounted basis (approximately $0.7 million per month for the next 20 years) with respect to our withdrawal liability. The initial demand did not address any assertion of liability for PIUMPF’s accumulated funding deficiency. In October 2019, we received two additional demand letters from PIUMPF related to a subsidiary of ours asserting that we owe $2.3 million on an undiscounted basis to be paid over 20 years with respect to the subsidiary’s withdrawal liability and $2.0 million for its accumulated funding deficiency. In February 2020, we received a demand letter from PIUMPF asserting that we owe $51.2 million for our pro-rata share of PIUMPF’s accumulated funding deficiency, including interest. We are evaluating each of these demands and we expect to challenge the accumulated funding deficiency demands. We began making monthly payments for these withdrawal liabilities in fiscal 2020.

We have also made other immaterial adjustments from time to time to our various other withdrawal liabilities. At June 30, 2020 and September 30, 2019, we had withdrawal liabilities recorded of $237.7 million and $237.2 million, respectively.

Pension and Postretirement Income / Expense

The following table presents a summary of the components of net pension income (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Service cost	$	11.9		$	10.2		$	39.2		$	32.5
Interest cost		49.7			58.8			149.1			174.0
Expected return on plan assets		(90.1	)		(85.9	)		(271.7	)		(254.7	)
Amortization of net actuarial loss		11.4			6.3			35.1			18.7
Amortization of prior service cost		1.9			1.3			5.4			3.9
Curtailment loss		—			0.1			0.4			1.0
Company defined benefit plan income		(15.2	)		(9.2	)		(42.5	)		(24.6	)
Multiemployer pension withdrawal income		(2.0	)		(1.7	)		(1.1	)		(1.7	)
Multiemployer and other plans		0.3			0.2			1.0			0.5
Net pension income	$	(16.9	)	$	(10.7	)	$	(42.6	)	$	(25.8	)

The non-service elements of our pension and postretirement costs set forth in this Note 5. Retirement Plans are reflected in the condensed consolidated statements of income line item “Pension and other postretirement non-service income”. The service cost components are reflected in “Cost of goods sold” and “Selling, general and administrative, excluding intangible amortization” line items.

We maintain other postretirement benefit plans that provide certain health care and life insurance benefits for certain salaried and hourly employees who meet specified age and service requirements as defined by the plans. The following table presents a summary of the components of the net postretirement cost (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Service cost	$	0.3		$	0.2		$	1.0		$	0.8
Interest cost		1.7			1.9			5.3			5.8
Amortization of net actuarial loss (gain)		0.5			(0.7	)		0.1			(1.5	)
Amortization of prior service credit		(0.7	)		(0.7	)		(2.1	)		(2.1	)
Net postretirement cost	$	1.8		$	0.7		$	4.3		$	3.0

Employer Contributions

During the three and nine months ended June 30, 2020, we made contributions to our qualified and supplemental defined benefit pension plans of $4.6 million and $17.2 million, respectively, and for the three and nine months ended June 30, 2019, we made contributions of $6.6 million and $16.1 million, respectively.

During the three and nine months ended June 30, 2020, we funded an aggregate of $1.6 million and $5.3 million, respectively, and for the three and nine months ended June 30, 2019, we funded an aggregate of $2.2 million and $6.6 million, respectively, to our other postretirement benefit plans.

Income Taxes

9 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Note 6.

Income Taxes

The effective tax rate for the three and nine months ended June 30, 2020 was 9.6% and 20.9%, respectively. The effective tax rate for the three and nine months ended June 30, 2020 was lower than the statutory federal rate primarily due to (i) the annual domestic federal return-to-provision adjustments, (ii) adjustments to certain uncertain tax positions and (iii) research and development tax credits, partially offset by the (iv) inclusion of state taxes, (v) income derived from certain foreign jurisdictions subject to higher tax rates, (vi) the exclusion of tax

benefits related to losses recorded by certain foreign operations, and (vii) tax expense related to stock based compensation.

The effective tax rate for the three and nine months ended June 30, 2019 was 23.4% and 25.2%, respectively. The effective tax rate for the three months ended June 30, 2019 was higher than the statutory federal rate primarily due to (i) the inclusion of state taxes, (ii) income derived from certain foreign jurisdictions subject to higher tax rates and (iii) the exclusion of tax benefits related to losses recorded by certain foreign operations, partially offset by (iv) the inclusion of tax benefits related to state tax law changes and (v) research and development tax credits. The effective tax rate for the nine months ended June 30, 2019 was higher than the statutory federal rate primarily due to (i) the inclusion of state taxes, (ii) income derived from certain foreign jurisdictions subject to higher tax rates, (iii) the exclusion of tax benefits related to losses recorded by certain foreign operations, (iv) the limitation of certain transaction costs and (v) the increase of deferred tax liabilities in certain state jurisdictions, partially offset by (vi) the inclusion of tax benefits related to share-based compensation and state tax law changes, (vii) research and development tax credits and (viii) an adjustment of the valuation allowance against net operating losses of foreign subsidiaries.

Segment Information

9 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Segment Information

Note 7.

Segment Information

We report our financial results of operations in the following three reportable segments: Corrugated Packaging, which consists of our containerboard mills, corrugated packaging and distribution operations, as well as our merchandising displays and recycling procurement operations; Consumer Packaging, which consists of our consumer mills, food and beverage and partition operations; and Land and Development, which previously sold real estate primarily in the Charleston, SC region. Certain income and expenses are not allocated to our segments and, thus, the information that management uses to make operating decisions and assess performance does not reflect these amounts. Items not allocated are reported as non-allocated expenses or in other line items in the table below after segment income.

The following tables show selected operating data for our segments (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Net sales (aggregate):
Corrugated Packaging	$	2,728.8		$	3,072.8		$	8,520.8		$	8,797.3
Consumer Packaging		1,552.6			1,650.1			4,705.8			4,937.2
Land and Development		—			8.6			18.9			23.3
Total	$	4,281.4		$	4,731.5		$	13,245.5		$	13,757.8
Less net sales (intersegment):
Corrugated Packaging	$	15.3		$	19.7		$	54.3		$	57.1
Consumer Packaging		29.8			21.8			83.9			63.3
Total	$	45.1		$	41.5		$	138.2		$	120.4
Net sales (unaffiliated customers):
Corrugated Packaging	$	2,713.5		$	3,053.1		$	8,466.5		$	8,740.2
Consumer Packaging		1,522.8			1,628.3			4,621.9			4,873.9
Land and Development		—			8.6			18.9			23.3
Total	$	4,236.3		$	4,690.0		$	13,107.3		$	13,637.4
Segment income:
Corrugated Packaging	$	227.9		$	392.7		$	755.8		$	949.8
Consumer Packaging		95.3			91.0			232.3			253.1
Land and Development		—			1.6			1.4			2.8
Segment income		323.2			485.3			989.5			1,205.7
(Loss) gain on sale of certain closed facilities		—			(2.7	)		5.5			47.8
Multiemployer pension withdrawal income		2.0			1.7			1.1			1.7
Land and Development impairments		—			—			—			(13.0	)
Restructuring and other costs		(9.7	)		(17.9	)		(56.2	)		(107.1	)
Non-allocated expenses		(18.3	)		(24.4	)		(54.1	)		(67.8	)
Interest expense, net		(92.4	)		(111.1	)		(283.2	)		(317.3	)
Loss on extinguishment of debt		(0.6	)		(3.2	)		(1.1	)		(4.7	)
Other (expense) income, net		(5.0	)		3.7			(9.6	)		(2.3	)
Income before income taxes	$	199.2		$	331.4		$	591.9		$	743.0

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Depreciation and amortization:
Corrugated Packaging	$	233.1	$	241.4	$	717.0	$	702.6
Consumer Packaging		131.2		140.7		399.7		418.5
Corporate		1.4		3.2		4.7		7.0
Total	$	365.7	$	385.3	$	1,121.4	$	1,128.1

In October 2018, our containerboard and pulp mill located in Panama City, FL sustained extensive damage from Hurricane Michael. In the three months ended December 31, 2019, we received the remaining Hurricane Michael-related insurance proceeds of $32.3 million, of which $29.5 million was recorded as a reduction of cost of goods sold in our Corrugated Packaging segment. The remaining $2.8 million was deferred and recorded as a reduction of cost of goods sold in the three months ended March 31, 2020. The insurance proceeds consisted of $11.7 million of business interruption recoveries and $20.6 million for direct costs and property damage. Our condensed consolidated statement of cash flows for the nine months ended June 30, 2020 included $30.9 million in net cash provided by operating activities and $1.4 million of cash proceeds included in net cash used for investing activities related to Hurricane Michael and a $1.0 million receipt of proceeds recorded as a reduction of cost of goods sold in the third quarter of fiscal 2020 for an unrelated matter in the Consumer Packaging segment.

In the three and nine months ended June 30, 2019, we received Hurricane Michael-related insurance proceeds of $30.0 million and $110.0 million, respectively, that were recorded as a reduction of cost of goods sold in our Corrugated Packaging segment. The insurance proceeds for the nine months ended June 30, 2019 consisted of $45.0 million of business interruption recoveries and $65.0 million for direct costs and property damage. Our condensed consolidated statement of cash flows for the nine months ended June 30, 2019 included $93.5 million in net cash provided by operating activities and $16.5 million of cash proceeds included in net cash used for investing activities.

Inventories

9 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Inventories

Note 8.

Inventories

We value substantially all of our U.S. inventories at the lower of cost or market, with cost determined on a last-in first-out (“LIFO”) basis. We value all other inventories at the lower of cost and net realizable value, with cost determined using methods that approximate cost computed on a first-in first-out (“FIFO”) basis. These other inventories represent primarily foreign inventories, distribution business inventories, spare parts inventories and certain inventoried supplies.

The components of inventories were as follows (in millions):

	June 30, 2020			September 30, 2019
Finished goods and work in process	$	937.1		$	938.9
Raw materials		788.0			818.8
Spare parts and supplies		513.8			479.7
Inventories at FIFO cost		2,238.9			2,237.4
LIFO reserve		(101.2	)		(129.9	)
Net inventories	$	2,137.7		$	2,107.5

Property, Plant and Equipment

9 Months Ended

Jun. 30, 2020

Property Plant And Equipment [Abstract]

Property, Plant and Equipment

Note 9.Property, Plant and Equipment

The components of property, plant and equipment were as follows (in millions):

	June 30, 2020			September 30, 2019
Property, plant and equipment at cost:
Land and buildings	$	2,507.3		$	2,442.3
Machinery and equipment		15,044.2			14,743.6
Forestlands and mineral rights		114.1			144.0
Transportation equipment		28.8			31.2
Leasehold improvements		102.8			100.2
		17,797.2			17,461.3
Less: accumulated depreciation, depletion and amortization		(6,874.6	)		(6,271.8	)
Property, plant and equipment, net	$	10,922.6		$	11,189.5

Fair Value

9 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value

Note 10.

Fair Value

Assets and Liabilities Measured or Disclosed at Fair Value

We estimate fair values in accordance with ASC 820, “Fair Value Measurement”. See “Note 12. Fair Value” of the Notes to Consolidated Financial Statements section of the Fiscal 2019 Form 10-K for more information. We disclose the fair value of our long-term debt in “Note 11. Debt”. We disclose the fair value of our pension and postretirement assets and liabilities in “Note 5. Retirement Plans” of the Notes to Consolidated Financial Statements section of the Fiscal 2019 Form 10-K.

Financial Instruments Not Recognized at Fair Value

Financial instruments not recognized at fair value on a recurring or nonrecurring basis include cash and cash equivalents, accounts receivable, certain other current assets, short-term debt, accounts payable, certain other current liabilities and long-term debt. With the exception of long-term debt, the carrying amounts of these financial instruments approximate their fair values due to their short maturities.

Fair Value of Nonfinancial Assets and Nonfinancial Liabilities

We measure certain nonfinancial assets and nonfinancial liabilities at fair value on a nonrecurring basis. These assets and liabilities include equity method investments and investments for which the fair value alternative is elected when they are deemed to be other-than-temporarily impaired, assets acquired and liabilities assumed in a merger, acquisition or in a nonmonetary exchange, and property, plant and equipment and intangible assets that are written down to fair value when they are held for sale or determined to be impaired. See “Note 4. Restructuring and Other Costs” for impairments associated with restructuring activities presented as “net property, plant and equipment costs”. During the three and nine months ended June 30, 2020 and 2019, we did not have any significant nonfinancial assets or nonfinancial liabilities that were measured at fair value on a nonrecurring basis in periods subsequent to initial recognition other than in the second quarter of fiscal 2019 when we recorded a $13.0 million pre-tax non-cash impairment of certain mineral rights.

Accounts Receivable Sales Agreement

We are a party to an accounts receivable sales agreement (the “A/R Sales Agreement”) to sell to a third party financial institution all of the short-term receivables generated from certain customer trade accounts, on a revolving basis. On September 19, 2019, we amended the A/R Sales Agreement and increased the purchase limit to $650.0 million. The A/R Sales Agreement has a one year term and may be terminated early by either party. The terms of the A/R Sales Agreement limit the balance of receivables sold to the amount available to fund such receivables sold and eliminated the receivable for proceeds from the financial institution at any transfer date. Transfers under the A/R Sales Agreement meet the requirements to be accounted for as sales in accordance with guidance in ASC 860, “Transfers and Servicing”.

The following table presents a summary of the activity under the A/R Sales Agreement for the nine months ended June 30, 2020 and June 30, 2019 (in millions):

	Nine Months Ended
	June 30,
	2020			2019
Receivable from financial institution at beginning of fiscal year	$	—		$	—
Receivables sold to the financial institution and derecognized		1,847.8			1,453.5
Receivables collected by financial institution		(1,844.7	)		(1,441.6	)
Cash paid to financial institution		(3.1	)		(11.9	)
Receivable from financial institution at June 30	$	—		$	—

While the expense recorded in connection with the sale of receivables may vary based on current rates and levels of receivables sold, the expense recorded in connection with the sale of receivables has generally ranged from $2 million to $4 million per quarter and is recorded in “other (expense) income, net”. Although the sales are made without recourse, we maintain continuing involvement with the sold receivables as we provide collections services related to the transferred assets. The associated servicing liability is not material given the high quality of the customers underlying the receivables and the anticipated short collection period.

- 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

Debt

9 Months Ended

Jun. 30, 2020

Debt [Abstract]

Debt

Note 11.

Debt

See “Note 13. Debt” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for additional information on our debt and interest rates on that debt.

The following table shows the carrying value of the individual components of our debt (in millions):

	June 30, 2020		September 30, 2019
Public bonds due fiscal 2020 to 2022	$	399.2	$	507.8
Public bonds due fiscal 2023 to 2028		3,772.4		3,769.1
Public bonds due fiscal 2029 to 2033		2,781.9		2,197.6
Public bonds due fiscal 2037 to 2047		178.7		179.0
Term loan facilities		1,797.1		2,295.5
Revolving credit and swing facilities		285.0		396.0
Commercial paper		329.9		339.2
Finance lease obligations		277.8		185.8
Supplier financing and commercial card programs		101.0		123.2
International and other debt		130.4		70.2
Total debt		10,053.4		10,063.4
Less: current portion of debt		213.1		561.1
Long-term debt due after one year	$	9,840.3	$	9,502.3

A portion of the debt classified as long-term may be paid down earlier than scheduled at our discretion without penalty. Certain customary restrictive covenants govern the maximum availability under our credit facilities. We test and report our compliance with these covenants as required and were in compliance with all of our covenants at June 30, 2020. The increase in finance lease obligations during fiscal 2020 was primarily the result of our adoption on October 1, 2019 of the leasing guidance codified in ASC 842 that caused us to recharacterize a short-term and long-term liability for two chip mills to a $100.3 million finance lease obligation.

The estimated fair value of our debt was approximately $10.8 billion as of June 30, 2020 and $10.6 billion at September 30, 2019. The fair value of our long-term debt is categorized as level 2 within the fair value hierarchy and is primarily either based on quoted prices for those or similar instruments or approximates the carrying amount as the variable interest rates reprice frequently at observable current market rates.

June 2033 Notes

On June 1, 2020, WRKCo issued $600.0 million aggregate principal amount of its 3.00% Senior Notes due 2033 (the “June 2033 Notes”) in a registered offering pursuant to the Company’s automatic shelf registration statement on Form S-3 under the Securities Act of 1933, as amended, (the “Securities Act”), at a discount of approximately $1.4 million. The June 2033 Notes transaction closed on June 3, 2020. The June 2033 Notes are WRKCo’s unsecured unsubordinated obligations, ranking equally with all of WRKCo’s other existing and future unsubordinated obligations. The June 2033 Notes will be effectively subordinated to any of WRKCo’s existing and future secured obligations to the extent of the value of the assets securing such obligations. In connection with issuing the June 2033 Notes, we recorded debt issuance costs of $5.1 million, which are being amortized over the term of the June 2033 Notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rate of the June 2033 Notes was 3.10% at June 30, 2020. WestRock Company (“Parent”), WestRock RKT, LLC (“RKT”) and WestRock MWV, LLC (“MWV” and, together with RKT, the “Guarantor Subsidiaries”) guaranteed WRKCo’s obligations under the June 2033 Notes. We may redeem the June 2033 Notes, in whole or in part, at any time at specified redemption prices, plus accrued and unpaid interest, if any. The proceeds from the issuance of the June 2033 Notes were primarily used to repay the $100.0 million principal amount of MWV’s 9.75% notes due June 2020 and reduce outstanding indebtedness under our Receivables Securitization Facility (as defined below) and Credit Facility (as defined below).

Revolving Credit Facility

On November 21, 2019, we amended our $2.0 billion unsecured revolving credit facility (the “Credit Facility”) to, among other things, increase the maximum permitted Debt to Capitalization Ratio (as defined in the credit agreement) from 0.60:1:00 to 0.65:1.00, extend its maturity date to November 21, 2024 and increase the committed principal to $2.3 billion. The portion of the Credit Facility that may be used to fund borrowings in non-U.S. dollar currencies including Canadian dollars, Euro and British Pounds was increased from $400 million to $500 million. Additionally, we may request that up to $200 million of the Credit Facility be used to fund borrowings in Mexican pesos. At June 30, 2020 and September 30, 2019, there were no amounts outstanding under the facility.

In connection with the amendment of the Credit Facility, on November 21, 2019, we terminated our $450.0 million unsecured revolving credit facility with Wells Fargo Bank, National Association, as administrative agent.

Delayed Draw Credit Facilities

On March 7, 2018, we entered into a credit agreement with Wells Fargo as administrative agent to provide for $3.8 billion of senior unsecured term loans, consisting of a 364-day $300.0 million term loan, a 3-year $1.75 billion term loan and a 5-year $1.75 billion term loan (the “Delayed Draw Credit Facilities”). At September 30, 2019, there was $1,396.9 million outstanding on the 5-year term loan, and no amounts outstanding under the 364-day and 3-year term loans.

On February 27, 2020, we prepaid $200.0 million of our 5-year term loan using proceeds from the issuance of commercial paper and cash and cash equivalents. On June 16, 2020, we prepaid $300.0 million of our 5-year term loan using cash and cash equivalents. At June 30, 2020, there was $898.4 million outstanding on the 5-year term loan.

Receivables Securitization Facility

On May 2, 2019, we amended our $700.0 million receivables securitization agreement (the “Receivables Securitization Facility”) to, among other things, extend its maturity date from July 22, 2019 to May 2, 2022. On March 27, 2020, we amended the facility to add additional Company legal entities that may serve to increase the amount of eligible receivables serving as collateral. At June 30, 2020 and September 30, 2019, maximum available borrowings, excluding amounts outstanding under the Receivables Securitization Facility, were $700.0 million and $592.1 million, respectively. The carrying amount of accounts receivable collateralizing the maximum available borrowings at June 30, 2020 and September 30, 2019 were approximately $1,134.0 million and $959.3 million, respectively. We have continuing involvement with the underlying receivables as we provide credit and collections services pursuant to the Receivables Securitization Facility. At June 30, 2020 and September 30, 2019, there were no amounts outstanding under this facility.

European Revolving Credit Facility

On April 27, 2018, we entered into a €500.0 million revolving credit facility with an incremental €100.0 million accordion feature with Coöperatieve Rabobank U.A., New York Branch as the administrative agent for the syndicate of banks. This facility provides for a 3-year unsecured U.S. dollar, Euro and British Pound denominated borrowing of not more than €500.0 million. On November 21, 2019, we amended the facility to, among other things, extend the maturity date from April 27, 2021 to November 21, 2022. At June 30, 2020, we had borrowed $285.0 million under this facility and entered into foreign currency exchange contracts of $285.2 million as an economic hedge for the U.S. dollar denominated borrowing plus interest by a non-U.S. dollar functional currency entity. The net of gains or losses from these foreign currency exchange contracts and the changes in the remeasurement of the U.S. dollar denominated borrowing in our foreign subsidiaries have been immaterial to our condensed consolidated statements of income. At June 30, 2020, none of the total amount outstanding was classified as short-term debt. At September 30, 2019, we had borrowed $350.0 million under this facility, of which $175.0 million was classified as short-term debt.

Commercial Paper Program

On October 31, 2017, we established an unsecured commercial paper program, pursuant to which we were able to issue short-term, unsecured commercial paper notes in an aggregate principal amount at any time not to exceed $1.0 billion with up to 397-day maturities. On December 7, 2018, we terminated the commercial paper

program and established a new unsecured commercial paper program with WRKCo as the issuer. Under the new program, we may issue short-term unsecured commercial paper notes in an aggregate principal amount at any time not to exceed $1.0 billion with up to 397-day maturities. The commercial paper program has no expiration date and can be terminated by either the agent or us with not less than 30 days’ notice. Our $2.3 billion unsecured revolving credit facility is intended to backstop the commercial paper program. Amounts available under the program may be borrowed, repaid and re-borrowed from time to time. The net proceeds from issuances of notes under the program were initially used to repay amounts outstanding under the KapStone securitization facility that were assumed in the KapStone Acquisition and subsequently terminated, and have been, and are expected to continue to be, used for general corporate purposes. At June 30, 2020, there was $329.9 million outstanding and the average borrowing rate was 0.34%. At September 30, 2019, there was $339.2 million outstanding and the average borrowing rate was 2.39%. At June 30, 2020 and September 30, 2019, $250.0 million of the total amount outstanding was classified as long-term debt.

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors

9 Months Ended

Jun. 30, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors

Note 12.

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors

The notes issued by WRKCo (“Issuer”) and registered under the Securities Act, are fully and unconditionally guaranteed on a joint and several basis by Parent and the Guarantor Subsidiaries. See “Note 13. Debt — Exchanged Notes” and “Note 14. Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for additional information regarding our registered notes and the guarantees of our notes.

In accordance with GAAP, we retrospectively account for changes in our legal structure that constitute transfers of businesses between issuers, guarantors and non-guarantors. As such, our prior period financial statements may vary from those previously reported. The information in the prior year tables reflect such revisions, as well as revisions to correct immaterial errors in prior presentations.

In accordance with Rule 3-10 of Regulation S-X, the following tables present condensed consolidating financial data of the Parent, the Issuer, the Guarantor Subsidiaries, the non-guarantor subsidiaries and eliminations. Such financial data include the related Condensed Consolidating Statements of Income for the three and nine months ended June 30, 2020 and June 30, 2019, Condensed Consolidating Balance Sheets as of June 30, 2020 and September 30, 2019 and Condensed Consolidating Statements of Cash Flows for the nine months ended June 30, 2020 and June 30, 2019.

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Three Months Ended June 30, 2020
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	604.9		$	4,293.6		$	(662.2	)	$	4,236.3
Cost of goods sold		—		—			485.3			3,635.4			(654.4	)		3,466.3
Gross profit		—		—			119.6			658.2			(7.8	)		770.0
Selling, general and administrative, excluding intangible amortization		—		0.4			18.6			371.1			—			390.1
Selling, general and administrative intangible amortization		—		—			24.5			75.1			—			99.6
(Gain) loss on disposal of assets		—		—			(0.1	)		1.1			—			1.0
Multiemployer pension withdrawal income		—		—			(2.0	)		—			—			(2.0	)
Restructuring and other costs		—		—			—			9.7			—			9.7
Operating profit (loss)		—		(0.4	)		78.6			201.2			(7.8	)		271.6
Interest (expense) income, net		—		(60.6	)		(33.5	)		1.7			—			(92.4	)
Intercompany interest (expense) income, net		—		(1.5	)		(17.8	)		11.5			7.8			—
Loss on extinguishment of debt		—		(0.6	)		—			—			—			(0.6	)
Pension and other postretirement non- service (expense) income		—		—			(1.4	)		27.0			—			25.6
Other income (expense), net		—		0.5			—			(5.5	)		—			(5.0	)
Equity in income of consolidated entities		178.5		272.7			195.8			—			(647.0	)		—
Income before income taxes		178.5		210.1			221.7			235.9			(647.0	)		199.2
Income tax benefit (expense)		—		15.6			(0.6	)		(34.2	)		—			(19.2	)
Consolidated net income		178.5		225.7			221.1			201.7			(647.0	)		180.0
Less: Net income attributable to noncontrolling interests		—		—			—			(1.5	)		—			(1.5	)
Net income attributable to common stockholders	$	178.5	$	225.7		$	221.1		$	200.2		$	(647.0	)	$	178.5
Comprehensive income attributable to common stockholders	$	210.1	$	257.2		$	250.2		$	231.3		$	(738.7	)	$	210.1

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Nine Months Ended June 30, 2020
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	1,825.1		$	13,233.2		$	(1,951.0	)	$	13,107.3
Cost of goods sold		—		—			1,469.1			11,181.4			(1,927.0	)		10,723.5
Gross profit		—		—			356.0			2,051.8			(24.0	)		2,383.8
Selling, general and administrative, excluding intangible amortization		—		0.7			75.3			1,158.4			—			1,234.4
Selling, general and administrative intangible amortization		—		—			75.0			226.5			—			301.5
Gain on disposal of assets		—		—			(0.1	)		(5.8	)		—			(5.9	)
Multiemployer pension withdrawal income		—		—			(1.9	)		0.8			—			(1.1	)
Restructuring and other costs		—		3.6			—			52.6			—			56.2
Operating profit (loss)		—		(4.3	)		207.7			619.3			(24.0	)		798.7
Interest (expense) income, net		—		(189.1	)		(102.3	)		8.2			—			(283.2	)
Intercompany interest (expense) income, net		—		(8.3	)		(67.2	)		51.5			24.0			—
Loss on extinguishment of debt		—		(1.0	)		—			(0.1	)		—			(1.1	)
Pension and other postretirement non- service (expense) income		—		—			(5.2	)		83.6			—			78.4
Other income (expense), net		0.1		0.5			1.3			(11.5	)		—			(9.6	)
Equity in income of unconsolidated entities		—		—			—			8.7			—			8.7
Equity in income of consolidated entities		465.0		751.6			445.2			—			(1,661.8	)		—
Income before income taxes		465.1		549.4			479.5			759.7			(1,661.8	)		591.9
Income tax benefit (expense)		—		50.4			(2.3	)		(171.6	)		—			(123.5	)
Consolidated net income		465.1		599.8			477.2			588.1			(1,661.8	)		468.4
Less: Net income attributable to noncontrolling interests		—		—			—			(3.3	)		—			(3.3	)
Net income attributable to common stockholders	$	465.1	$	599.8		$	477.2		$	584.8		$	(1,661.8	)	$	465.1
Comprehensive income attributable to common stockholders	$	220.3	$	355.9		$	238.6		$	347.4		$	(941.9	)	$	220.3

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Three Months Ended June 30, 2019
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	643.0		$	4,676.3		$	(629.3	)	$	4,690.0
Cost of goods sold		—		—			475.6			3,844.9			(619.4	)		3,701.1
Gross profit		—		—			167.4			831.4			(9.9	)		988.9
Selling, general and administrative, excluding intangible amortization		—		(0.4	)		26.0			416.8			—			442.4
Selling, general and administrative intangible amortization		—		—			26.1			76.3			—			102.4
Loss on disposal of assets		—		—			0.1			6.4			—			6.5
Multiemployer pension withdrawal income		—		—			—			(1.7	)		—			(1.7	)
Restructuring and other costs		—		1.4			0.1			16.4			—			17.9
Operating profit (loss)		—		(1.0	)		115.1			317.2			(9.9	)		421.4
Interest expense, net		—		(66.5	)		(36.9	)		(7.7	)		—			(111.1	)
Intercompany interest (expense) income, net		—		(2.5	)		(33.3	)		25.9			9.9			—
Loss on extinguishment of debt		—		(0.8	)		(2.3	)		(0.1	)		—			(3.2	)
Pension and other postretirement non- service (expense) income		—		—			(1.4	)		20.3			—			18.9
Other (expense) income, net		—		—			(35.2	)		38.9			—			3.7
Equity in income of unconsolidated entities		—		—			—			1.7			—			1.7
Equity in income (loss) of consolidated entities		252.6		276.9			(11.4	)		—			(518.1	)		—
Income (loss) before income taxes		252.6		206.1			(5.4	)		396.2			(518.1	)		331.4
Income tax benefit (expense)		—		17.9			(1.9	)		(93.6	)		—			(77.6	)
Consolidated net income (loss)		252.6		224.0			(7.3	)		302.6			(518.1	)		253.8
Less: Net income attributable to noncontrolling interests		—		—			—			(1.2	)		—			(1.2	)
Net income (loss) attributable to common stockholders	$	252.6	$	224.0		$	(7.3	)	$	301.4		$	(518.1	)	$	252.6
Comprehensive income attributable to common stockholders	$	282.7	$	253.7		$	20.7		$	331.8		$	(606.2	)	$	282.7

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Nine Months Ended June 30, 2019
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	1,906.0		$	13,648.2		$	(1,916.8	)	$	13,637.4
Cost of goods sold		—		—			1,503.3			11,370.7			(1,906.9	)		10,967.1
Gross profit		—		—			402.7			2,277.5			(9.9	)		2,670.3
Selling, general and administrative, excluding intangible amortization		—		—			53.3			1,234.1			—			1,287.4
Selling, general and administrative intangible amortization		—		—			78.4			219.3			—			297.7
Loss (gain) on disposal of assets		—		—			0.1			(37.4	)		—			(37.3	)
Multiemployer pension withdrawal income		—		—			—			(1.7	)		—			(1.7	)
Land and Development impairments		—		—			—			13.0			—			13.0
Restructuring and other costs		—		5.3			0.2			101.6			—			107.1
Operating profit (loss)		—		(5.3	)		270.7			748.6			(9.9	)		1,004.1
Interest expense, net		—		(178.5	)		(128.8	)		(10.0	)		—			(317.3	)
Intercompany interest income (expense), net		—		1.0			(87.9	)		77.0			9.9			—
Loss on extinguishment of debt		—		(2.6	)		(1.9	)		(0.2	)		—			(4.7	)
Pension and other postretirement non- service (expense) income		—		—			(4.8	)		59.7			—			54.9
Other (expense) income, net		—		(4.0	)		(35.6	)		37.3			—			(2.3	)
Equity in income of unconsolidated entities		—		—			—			8.3			—			8.3
Equity in income of consolidated entities		552.1		671.1			403.0			—			(1,626.2	)		—
Income before income taxes		552.1		481.7			414.7			920.7			(1,626.2	)		743.0
Income tax benefit (expense)		—		46.9			(3.2	)		(231.2	)		—			(187.5	)
Consolidated net income		552.1		528.6			411.5			689.5			(1,626.2	)		555.5
Less: Net income attributable to noncontrolling interests		—		—			—			(3.4	)		—			(3.4	)
Net income attributable to common stockholders	$	552.1	$	528.6		$	411.5		$	686.1		$	(1,626.2	)	$	552.1
Comprehensive income attributable to common stockholders	$	552.0	$	530.6		$	415.9		$	687.0		$	(1,633.5	)	$	552.0

CONDENSED CONSOLIDATING BALANCE SHEETS

	June 30, 2020
(In millions)	Parent		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated Total

ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	—	$	178.4	$	113.1	$	—		$	291.5
Accounts receivable		—		—		38.9		2,092.7		(48.4	)		2,083.2
Inventories		—		—		239.9		1,897.8		—			2,137.7
Other current assets		0.5		—		6.3		483.4		—			490.2
Intercompany receivables		—		24.0		0.3		1,372.8		(1,397.1	)		—
Assets held for sale		—		—		—		3.3		—			3.3
Total current assets		0.5		24.0		463.8		5,963.1		(1,445.5	)		5,005.9
Property, plant and equipment, net		—		—		14.8		10,907.8		—			10,922.6
Goodwill		—		—		1,158.6		6,111.9		—			7,270.5
Intangibles, net		—		—		1,409.9		2,339.5		—			3,749.4
Restricted assets held by special purpose entities		—		—		—		1,269.2		—			1,269.2
Prepaid pension asset		—		—		—		305.9		—			305.9
Intercompany notes receivable		—		154.9		149.8		2,821.3		(3,126.0	)		—
Investments in consolidated subsidiaries		12,158.9		18,891.4		19,827.1		—		(50,877.4	)		—
Other assets		—		91.4		233.8		1,515.6		(86.7	)		1,754.1
Total Assets	$	12,159.4	$	19,161.7	$	23,257.8	$	31,234.3	$	(55,535.6	)	$	30,277.6

LIABILITIES AND EQUITY
Current liabilities:
Current portion of debt	$	—	$	79.9	$	—	$	133.2	$	—		$	213.1
Accounts payable		—		1.1		24.2		1,536.6		(48.4	)		1,513.5
Accrued compensation and benefits		0.2		—		14.5		362.5		—			377.2
Other current liabilities		—		51.8		107.7		523.6		—			683.1
Intercompany payables		446.1		57.7		470.6		422.7		(1,397.1	)		—
Total current liabilities		446.3		190.5		617.0		2,978.6		(1,445.5	)		2,786.9
Long-term debt due after one year		—		6,706.4		1,972.0		1,161.9		—			9,840.3
Intercompany notes payable		—		753.3		2,068.0		304.7		(3,126.0	)		—
Pension liabilities, net of current portion		—		—		141.6		129.7		—			271.3
Postretirement benefit liabilities, net of current portion		—		—		25.2		126.7		—			151.9
Non-recourse liabilities held by special purpose entities		—		—		—		1,138.7		—			1,138.7
Deferred income taxes		—		—		310.0		2,664.9		(86.7	)		2,888.2
Other long-term liabilities		—		35.3		152.5		1,281.0		—			1,468.8
Redeemable noncontrolling interests		—		—		—		1.6		—			1.6
Total stockholders’ equity		11,713.1		11,476.2		17,971.5		21,429.7		(50,877.4	)		11,713.1
Noncontrolling interests		—		—		—		16.8		—			16.8
Total equity		11,713.1		11,476.2		17,971.5		21,446.5		(50,877.4	)		11,729.9
Total Liabilities and Equity	$	12,159.4	$	19,161.7	$	23,257.8	$	31,234.3	$	(55,535.6	)	$	30,277.6

CONDENSED CONSOLIDATING BALANCE SHEETS

	September 30, 2019
(In millions)	Parent		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated Total

ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	—	$	17.8	$	133.8	$	—		$	151.6
Accounts receivable		—		—		31.1		2,201.7		(39.6	)		2,193.2
Inventories		—		—		254.3		1,853.2		—			2,107.5
Other current assets		—		1.2		11.8		483.2		—			496.2
Intercompany receivables		—		227.7		—		1,128.6		(1,356.3	)		—
Assets held for sale		—		—		—		25.8		—			25.8
Total current assets		—		228.9		315.0		5,826.3		(1,395.9	)		4,974.3
Property, plant and equipment, net		—		—		18.9		11,170.6		—			11,189.5
Goodwill		—		—		1,158.6		6,127.0		—			7,285.6
Intangibles, net		—		—		1,485.0		2,574.5		—			4,059.5
Restricted assets held by special purpose entities		—		—		—		1,274.3		—			1,274.3
Prepaid pension asset		—		—		—		224.7		—			224.7
Intercompany notes receivable		—		155.0		156.9		3,026.8		(3,338.7	)		—
Investments in consolidated subsidiaries		11,973.6		18,524.2		20,103.6		—		(50,601.4	)		—
Other assets		—		67.8		185.3		971.8		(76.1	)		1,148.8
Total Assets	$	11,973.6	$	18,975.9	$	23,423.3	$	31,196.0	$	(55,412.1	)	$	30,156.7

LIABILITIES AND EQUITY
Current liabilities:
Current portion of debt	$	—	$	135.3	$	108.9	$	316.9	$	—		$	561.1
Accounts payable		—		0.7		31.3		1,839.4		(39.6	)		1,831.8
Accrued compensation and benefits		0.3		—		14.5		455.6		—			470.4
Other current liabilities		—		18.6		83.8		469.4		—			571.8
Intercompany payables		303.4		—		1,052.9		—		(1,356.3	)		—
Total current liabilities		303.7		154.6		1,291.4		3,081.3		(1,395.9	)		3,435.1
Long-term debt due after one year		—		6,608.0		1,982.9		911.4		—			9,502.3
Intercompany notes payable		—		636.3		2,390.5		311.9		(3,338.7	)		—
Pension liabilities, net of current portion		—		—		147.6		146.4		—			294.0
Postretirement benefit liabilities, net of current portion		—		—		25.7		136.4		—			162.1
Non-recourse liabilities held by special purpose entities		—		—		—		1,145.2		—			1,145.2
Deferred income taxes		—		—		278.9		2,675.2		(76.1	)		2,878.0
Other long-term liabilities		—		12.9		131.2		909.8		—			1,053.9
Redeemable noncontrolling interests		—		—		—		1.9		—			1.9
Total stockholders’ equity		11,669.9		11,564.1		17,175.1		21,862.2		(50,601.4	)		11,669.9
Noncontrolling interests		—		—		—		14.3		—			14.3
Total equity		11,669.9		11,564.1		17,175.1		21,876.5		(50,601.4	)		11,684.2
Total Liabilities and Equity	$	11,973.6	$	18,975.9	$	23,423.3	$	31,196.0	$	(55,412.1	)	$	30,156.7

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

	Nine Months Ended June 30, 2020
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Operating activities:
Net cash provided by (used for) operating activities	$	275.9		$	(38.1	)	$	250.6		$	850.6		$	—		$	1,339.0
Investing activities:
Capital expenditures		—			—			—			(860.2	)		—			(860.2	)
Investment in unconsolidated entities		—			—			—			(1.0	)		—			(1.0	)
Proceeds from sale of property, plant and equipment		—			—			0.1			22.4			—			22.5
Proceeds from property, plant and equipment insurance settlement		—			—			—			2.4			—			2.4
Intercompany notes proceeds		—			—			5.0			—			(5.0	)		—
Other, net		—			—			9.9			1.0			—			10.9
Net cash provided by (used for) investing activities		—			—			15.0			(835.4	)		(5.0	)		(825.4	)
Financing activities:
Proceeds from issuance of notes		—			598.6			—			—			—			598.6
Additions to revolving credit facilities		—			350.0			—			63.0			—			413.0
Repayments of revolving credit facilities		—			(350.0	)		—			(128.2	)		—			(478.2	)
Additions to debt		—			—			—			683.1			—			683.1
Repayments of debt		—			(500.0	)		(105.0	)		(590.8	)		—			(1,195.8	)
Repayments of commercial paper, net		—			(9.3	)		—			—			—			(9.3	)
Other debt repayments, net		—			(46.0	)		—			(23.2	)		—			(69.2	)
Issuances of common stock, net of related minimum tax withholdings		16.7			—			—			—			—			16.7
Cash dividends paid to stockholders		(292.6	)		—			—			—			—			(292.6	)
Cash distributions paid to noncontrolling interests		—			—			—			(1.4	)		—			(1.4	)
Intercompany notes payments		—			—			—			(5.0	)		5.0			—
Other, net		—			(5.2	)		—			(11.8	)		—			(17.0	)
Net cash (used for) provided by financing activities		(275.9	)		38.1			(105.0	)		(14.3	)		5.0			(352.1	)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		—			—			—			(21.6	)		—			(21.6	)
Increase (decrease) in cash, cash equivalents and restricted cash		—			—			160.6			(20.7	)		—			139.9
Cash, cash equivalents and restricted cash at beginning of period		—			—			17.8			133.8			—			151.6
Cash, cash equivalents and restricted cash at end of period	$	—		$	—		$	178.4		$	113.1		$	—		$	291.5

The condensed consolidating statements of cash flows for the nine months ended June 30, 2020 do not include non-cash transactions between Parent, Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries. From time to time, we may enter into non-cash transactions for simplicity of execution of intercompany transactions. These may include intercompany non-cash capitalizations, intercompany non-cash returns of capital, intercompany debt-to-equity conversions or other transactions of a similar nature. The table below summarizes these non-cash transactions.

	Nine Months Ended June 30, 2020
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Investing activities:
Intercompany notes issued	$	—		$	—		$	(63.6	)	$	(117.0	)	$	180.6		$	—
Intercompany notes proceeds	$	—		$	—		$	65.8		$	322.5		$	(388.3	)	$	—
Intercompany capital investment	$	(407.3	)	$	(625.6	)	$	(917.8	)	$	—		$	1,950.7		$	—
Intercompany return of capital	$	442.0		$	21.2		$	619.7		$	—		$	(1,082.9	)	$	—

Financing activities:
Intercompany notes borrowing	$	—		$	117.0		$	—		$	63.6		$	(180.6	)	$	—
Intercompany notes payments	$	—		$	—		$	(322.5	)	$	(65.8	)	$	388.3		$	—
Intercompany capital receipt	$	—		$	—		$	625.2		$	1,325.5		$	(1,950.7	)	$	—
Intercompany capital distribution	$	—		$	(442.0	)	$	(21.2	)	$	(619.7	)	$	1,082.9		$	—
Intercompany dividends paid	$	—		$	—		$	(48.3	)	$	(1,436.9	)	$	1,485.2		$	—

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

	Nine Months Ended June 30, 2019
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Operating activities:
Net cash provided by (used for) operating activities	$	430.7		$	(512.4	)	$	445.9		$	1,035.4		$	—		$	1,399.6
Investing activities:
Capital expenditures		—			—			(2.5	)		(974.3	)		—			(976.8	)
Cash paid related to business combinations, net of cash acquired		—			—			—			(3,368.3	)		—			(3,368.3	)
Investment in unconsolidated entities		—			—			—			(10.4	)		—			(10.4	)
Proceeds from sale of property, plant and equipment		—			—			—			108.3			—			108.3
Proceeds from property, plant and equipment insurance settlement		—			—			—			16.5			—			16.5
Intercompany notes issued		—			—			(0.1	)		(75.7	)		75.8			—
Intercompany notes proceeds		—			9.2			4.3			3,870.2			(3,883.7	)		—
Intercompany capital investment		(563.0	)		(563.0	)		—			—			1,126.0			—
Other, net		—			—			28.2			1.8			—			30.0
Net cash (used for) provided by investing activities		(563.0	)		(553.8	)		29.9			(431.9	)		(2,681.9	)		(4,200.7	)
Financing activities:
Proceeds from issuance of notes		—			2,498.2			—			—			—			2,498.2
Additions to revolving credit facilities		—			67.2			—			125.0			—			192.2
Repayments of revolving credit facilities		—			(67.2	)		—			(110.0	)		—			(177.2	)
Additions to debt		—			4,101.8			(1.0	)		340.2			—			4,441.0
Repayments of debt		—			(2,187.1	)		(958.6	)		(1,519.3	)		—			(4,665.0	)
Additions to commercial paper, net		—			445.6			—			—			—			445.6
Other debt additions, net		—			35.3			—			10.6			—			45.9
Issuances of common stock, net of related minimum tax withholdings		8.6			—			—			—			—			8.6
Purchases of common stock		(88.6	)		—			—			—			—			(88.6	)
Cash dividends paid to stockholders		(350.7	)		—			—			—			—			(350.7	)
Cash distributions paid to noncontrolling interests		—			—			—			(3.4	)		—			(3.4	)
Intercompany notes borrowing		—			—			75.7			0.1			(75.8	)		—
Intercompany notes payments		—			(3,800.0	)		(70.2	)		(13.5	)		3,883.7			—
Intercompany capital receipt		563.0			—			—			563.0			(1,126.0	)		—
Other, net		—			(27.8	)		—			20.7			—			(7.1	)
Net cash provided by (used for) financing activities		132.3			1,066.0			(954.1	)		(586.6	)		2,681.9			2,339.5
Effect of exchange rate changes on cash, cash equivalents and restricted cash		—			—			—			3.9			—			3.9
(Decrease) increase in cash, cash equivalents and restricted cash		—			(0.2	)		(478.3	)		20.8			—			(457.7	)
Cash, cash equivalents and restricted cash at beginning of period		—			0.2			490.8			145.8			—			636.8
Cash, cash equivalents and restricted cash at end of period	$	—		$	—		$	12.5		$	166.6		$	—		$	179.1

The condensed consolidating statements of cash flows for the nine months ended June 30, 2019 do not include non-cash transactions between Parent, Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries. From time to time, we may enter into non-cash transactions for simplicity of execution of intercompany transactions. These may include intercompany non-cash capitalizations, intercompany non-cash returns of capital, intercompany debt-to-equity conversions or other transactions of a similar nature. The table below summarizes these non-cash transactions.

	Nine Months Ended June 30, 2019
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Operating activities:
Intercompany receivables	$	(140.9	)	$	—		$	—		$	—		$	140.9		$	—
Intercompany payables	$	—		$	—		$	—		$	140.9		$	(140.9	)	$	—

Investing activities:
Intercompany notes issued	$	—		$	(3,800.0	)	$	(4,666.4	)	$	(8,715.4	)	$	17,181.8		$	—
Intercompany notes proceeds	$	—		$	4,519.8		$	4,519.8		$	4,759.6		$	(13,799.2	)	$	—
Intercompany capital investment	$	(10,396.2	)	$	(5,895.5	)	$	(6,880.5	)	$	—		$	23,172.2		$	—
Intercompany return of capital	$	606.7		$	1,479.6		$	1,021.4		$	—		$	(3,107.7	)	$	—

Financing activities:
Intercompany notes borrowing	$	—		$	4,436.3		$	479.1		$	12,266.4		$	(17,181.8	)	$	—
Intercompany notes payments	$	—		$	—		$	(959.6	)	$	(12,839.6	)	$	13,799.2		$	—
Intercompany capital receipt	$	—		$	10,396.2		$	5,413.7		$	7,362.3		$	(23,172.2	)	$	—
Intercompany capital distribution	$	(563.0	)	$	(606.7	)	$	(457.5	)	$	(1,480.5	)	$	3,107.7		$	—
Intercompany dividends paid	$	—		$	—		$	(302.2	)	$	(1,419.6	)	$	1,721.8		$	—

Leases

9 Months Ended

Jun. 30, 2020

Leases [Abstract]

Leases

Note 13.Leases

On October 1, 2019, we adopted ASU 2016-02 “Leases”, which is codified in ASC 842 and supersedes current lease guidance in ASC 840, using the modified retrospective approach and as a result we did not restate prior periods. We elected the package of three practical expedients permitted within the standard pursuant to which we did not reassess initial direct costs, lease classification or whether our contracts contain or are leases. In addition, we also applied the practical expedient to account for the lease and non-lease components as a single lease component for all of our leases. We also made an accounting policy election to not recognize ROU assets and liability for leases with a term of 12 months or less unless the lease includes an option to renew or purchase the underlying asset that are reasonably certain to be exercised. The adoption of ASC 842 resulted in the recognition of ROU assets of $731.1 million (net of deferred rent and favorable/unfavorable lease liabilities) with corresponding operating lease liabilities of $783.9 million. The condensed consolidated financial statements for the periods ended June 30, 2020 are presented under the new standard, while comparative periods presented have not been adjusted and continue to be reported in accordance with the previous standard.

We lease various real estate, including certain operating facilities, warehouses, office space and land. We also lease material handling equipment, vehicles and certain other equipment. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Effective October 1, 2019, operating lease ROU assets and liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Our leases may include options to extend or terminate the lease. These options to extend are included in the lease term when it is reasonably certain that we will exercise that option. Some leases provide for variable payments, however, because they are not based on an index or rate, they are not included in the ROU assets and liabilities. Variable payments for real estate leases primarily relate to common area maintenance, insurance, taxes and utilities. Variable payments for equipment, vehicles and leases within supply agreements primarily relate to usage, repairs, and maintenance. As the implicit rate is not readily determinable for our leases, we apply a portfolio approach using an estimated incremental borrowing rate to determine the initial present value of lease payments over the lease terms on a collateralized basis over a similar term, which is based on market and company specific information. We use the unsecured borrowing rate and risk-adjust that rate to approximate a collateralized rate, and apply the rate based on the currency of the lease, which is updated on a quarterly basis for measurement of new lease liabilities.

Components of Lease Costs

The following table presents certain information related to the lease costs for finance and operating leases (in millions):

	Three Months Ended			Nine Months Ended
	June 30, 2020			June 30, 2020
Operating lease costs	$	50.0		$	150.0
Variable and short-term lease costs		25.6			79.6
Sublease income		(1.5	)		(5.0	)
Finance lease cost:
Amortization of lease assets		2.5			8.0
Interest on lease liabilities		1.9			6.0
Total lease cost, net	$	78.5		$	238.6

Supplemental Balance Sheet Information Related to Leases

The table below presents the lease-related assets and liabilities recorded on the balance sheet (in millions):

	Condensed Consolidated Balance Sheet Caption	June 30, 2020

Operating leases:
Operating lease right-of-use asset	Other assets	$	649.2

Current operating lease liabilities	Other current liabilities	$	169.0
Operating lease liabilities	Other long-term liabilities		535.5
Total operating lease liabilities		$	704.5

Finance leases:
Property, plant and equipment		$	145.6
Accumulated depreciation			(19.0	)
Property, plant and equipment, net		$	126.6

Current finance lease liabilities	Current portion of debt	$	9.3
Noncurrent finance lease liabilities	Long-term debt due after one year		268.5
Total finance lease liabilities		$	277.8

Our finance lease portfolio includes certain assets that are either fully depreciated or transferred for which the lease arrangement requires a one-time principal repayment on the maturity date of the lease obligation.

Lease Term and Discount Rate

	June 30, 2020
Weighted average remaining lease term:
Operating leases	5.9 years
Finance leases	9.2 years

Weighted average discount rate:
Operating leases		2.7	%
Finance leases		4.0	%

Supplemental Cash Flow Information Related to Leases

The table below presents supplemental cash flow information related to leases (in millions):

	Nine Months Ended
	June 30, 2020

Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows related to operating leases	$	151.7
Operating cash flows related to finance leases	$	6.5
Financing cash flows related to finance leases	$	7.7

Maturity of Lease Liabilities

The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years to the operating lease liabilities and finance lease liabilities recorded on the balance sheet (in millions):

	June 30, 2020
	Operating Leases			Finance Leases			Total

Remaining fiscal 2020	$	50.3		$	4.3		$	54.6
Fiscal 2021		177.1			16.1			193.2
Fiscal 2022		140.3			15.2			155.5
Fiscal 2023		110.0			13.3			123.3
Fiscal 2024		87.8			12.1			99.9
Thereafter		203.5			300.9			504.4
Total lease payments		769.0			361.9			1,130.9
Less: Interest ⁽¹⁾		(64.5	)		(84.1	)		(148.6	)
Present value of future lease payments	$	704.5		$	277.8		$	982.3

⁽¹⁾

^{Calculated using the interest rate for each lease.}

At September 30, 2019, future minimum payments under all existing non-cancelable operating leases for the succeeding five years and thereafter were as follows (in millions):

Fiscal 2020	$	214.3
Fiscal 2021		180.1
Fiscal 2022		136.3
Fiscal 2023		108.3
Fiscal 2024		85.3
Thereafter		206.1
Total	$	930.4

Commitments and Contingencies

9 Months Ended

Jun. 30, 2020

Commitments And Contingencies [Abstract]

Commitments and Contingencies

Note 14.

Commitments and Contingencies

Environmental

We are subject to a broad range of foreign, federal, state and local environmental, health and safety laws and regulations, including those governing discharges to air, soil and water, the management, treatment and disposal of hazardous substances, solid waste and hazardous wastes, the investigation and remediation of contamination resulting from historical site operations and releases of hazardous substances, and the health and safety of employees. Our compliance initiatives related to these laws and regulations could result in significant costs, which could negatively impact our results of operations, financial condition and cash flows. Any failure to comply with environmental or health and safety laws and regulations, or any permits and authorizations required thereunder, could subject us to fines, corrective action or other sanctions.

We have been named as a potentially responsible party (“PRP”) in environmental remediation actions under various federal and state laws, including the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (“CERCLA”). Many of these proceedings involve the cleanup of hazardous substances at sites that received waste from many different sources. While joint and several liability is authorized under CERCLA and analogous state laws, liability for CERCLA cleanups is typically shared with other PRPs, and costs are commonly allocated according to relative amounts of waste deposited and other factors. We believe we have insurance and contractual indemnification rights that may allow us to recover certain defense and other costs at some CERCLA sites. There are other remediation costs typically associated with the cleanup of hazardous substances at our current, closed or formerly-owned facilities, and recorded as liabilities in our balance sheet. Remediation costs are recorded in our financial statements when they become probable and reasonably estimable.

See “Note 18. Commitments and Contingencies” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for information related to environmental matters.

As of June 30, 2020, we had $8.1 million reserved for environmental liabilities on an undiscounted basis, of which $2.9 million is included in other long-term liabilities and $5.2 million is included in other current liabilities, including amounts accrued in connection with environmental obligations relating to manufacturing facilities that we have closed. We believe the liability for these matters was adequately reserved at June 30, 2020.

Litigation

We have been named a defendant in asbestos-related personal injury litigation. To date, the costs resulting from the litigation, including settlement costs, have not been significant. As of June 30, 2020, there were approximately 1,125 such lawsuits. We believe that we have substantial insurance coverage, subject to applicable deductibles and policy limits, with respect to asbestos claims. We also have valid defenses to these asbestos-related personal injury claims and intend to continue to defend them vigorously. Should the volume of litigation grow substantially, it is possible that we could incur significant costs resolving these cases. We do not expect the resolution of pending asbestos litigation and proceedings to have a material adverse effect on our results of operations, financial condition or cash flows. In any given period or periods, however, it is possible such proceedings or matters could have a material adverse effect on our results of operations, financial condition or cash flows.

We are a defendant in a number of other lawsuits and claims arising out of the conduct of our business. While the ultimate results of such suits or other proceedings against us cannot be predicted with certainty, we believe the resolution of these other matters will not have a material adverse effect on our results of operations, financial condition or cash flows.

Brazil Tax Liability

We are challenging claims by the Brazil Federal Revenue Department that we are liable for underpayment of tax, penalties and interest in relation to a claim that a subsidiary of MeadWestvaco Corporation had reduced its tax liability related to the goodwill generated by the 2002 merger of two of its Brazil subsidiaries. The matter has proceeded through the Brazil Administrative Council of Tax Appeals (“CARF”) principally in two proceedings, covering tax years 2003 to 2008 and 2009 to 2012. The tax and interest claim relating to tax years 2009 to 2012 was finalized and is now the subject of an annulment action we filed in the Brazil federal court. CARF notified us of its final decision regarding the tax, penalties and interest claims relating to tax years 2003 to 2008 on June 3, 2020. We have filed an annulment action in Brazil federal court with respect to that decision as well. The dispute related to penalties for tax years 2009 to 2012 remains before CARF.

We assert that we have no liability in these matters. The total amount in dispute before CARF and in the annulment actions relating to the claimed tax deficiency was R$691 million ($127 million) as of June 30, 2020, including various penalties and interest. The amount of our uncertain tax position reserve for this matter, that excludes certain penalties, is included in the unrecognized tax benefits table. See “Note 6. Income Taxes” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K. Resolution of the uncertain tax positions could have a material adverse effect on our cash flows and results of operations or materially benefit our results of operations in future periods depending upon their ultimate resolution.

Guarantees

We make certain guarantees in the normal course of conducting our operations, for compliance with certain laws and regulations, or in connection with certain business dispositions. The guarantees include items such as funding of net losses in proportion to our ownership share of certain joint ventures, debt guarantees related to certain unconsolidated entities acquired in acquisitions, indemnifications of lessors in certain facilities and equipment operating leases for items such as additional taxes being assessed due to a change in tax law, and certain other agreements. We estimate our exposure to these matters could be approximately $50 million. As of June 30, 2020, we had recorded $9.7 million for the estimated fair value of these guarantees. We are unable to estimate our maximum exposure under operating leases because it is dependent on potential changes in the tax laws; however, we believe our exposure related to guarantees would not have a material impact on our results of operations, financial condition or cash flows.

Indirect Tax Claim

In March 2017, the Supreme Court of Brazil issued a decision concluding that certain state value added tax should not be included in the calculation of federal gross receipts taxes. Subsequently, in fiscal 2019, the Supreme Court of Brazil rendered favorable decisions on six of our cases granting us the right to recover certain state value added tax. The tax authorities in Brazil have filed a Motion of Clarification with the Supreme Court of Brazil and the timing of the decision is unknown at this time. However, based on our preliminary evaluation and the opinion of our tax and legal advisors, we believe the decision reduced our gross receipts tax in Brazil prospectively and retrospectively, and will allow us to recover tax amounts collected by the government. Due to the volume of invoices being reviewed (January 2002 to September 2019), we have recorded the estimated recoveries across several periods beginning in the fourth quarter of fiscal 2019 as we have reviewed the documents and the amount has become estimable. In the three months and nine months ended June 30, 2020, we recorded a receivable for our expected recovery and interest that consisted primarily of a $4.2 million and $27.7 million reduction of cost of goods sold and a $6.0 million and $17.6 million reduction of interest expense, net, respectively. We are in the process of calculating additional recoveries for 2009, and may record additional amounts in future periods as we complete our analysis. We will continue to evaluate the impact of the court’s decision on the remainder of our cases.

Equity and Other Comprehensive Income (Loss)

9 Months Ended

Jun. 30, 2020

Equity [Abstract]

Equity and Other Comprehensive Income (Loss)

Note 15.

Equity and Other Comprehensive Income (Loss)

Equity

Stock Repurchase Program

In July 2015, our board of directors authorized a repurchase program of up to 40.0 million shares of our common stock, par value $0.01 per share (“Common Stock”), representing approximately 15% of our outstanding Common Stock as of July 1, 2015. The shares of Common Stock may be repurchased over an indefinite period of time at the discretion of management. Pursuant to the program, in the nine months ended June 30, 2020, we repurchased no shares of Common Stock. In the nine months ended June 30, 2019, we repurchased approximately 2.1 million shares of Common Stock for an aggregate cost of $88.6 million. As of June 30, 2020, we had approximately 19.1 million shares of Common Stock available for repurchase under the program.

Accumulated Other Comprehensive Loss

The tables below summarize the changes in accumulated other comprehensive loss, net of tax, by component for the nine months ended June 30, 2020 and June 30, 2019 (in millions):

	Deferred (Loss) Income on Cash Flow Hedges			Defined Benefit Pension and Postretirement Plans			Foreign Currency Items			Total ⁽¹⁾
Balance at September 30, 2019	$	0.7		$	(698.0	)	$	(371.9	)	$	(1,069.2	)
Other comprehensive loss before reclassifications		(10.1	)		—			(265.2	)		(275.3	)
Amounts reclassified from accumulated other comprehensive loss		2.2			28.3			—			30.5
Net current period other comprehensive (loss) income		(7.9	)		28.3			(265.2	)		(244.8	)
Reclassification of stranded tax effects		—			(73.4	)		—			(73.4	)
Balance at June 30, 2020	$	(7.2	)	$	(743.1	)	$	(637.1	)	$	(1,387.4	)

⁽¹⁾ All amounts are net of tax and noncontrolling interests.

	Deferred Loss on Cash Flow Hedges			Defined Benefit Pension and Postretirement Plans			Foreign Currency Items			Total ⁽¹⁾
Balance at September 30, 2018	$	(0.2	)	$	(465.9	)	$	(229.2	)	$	(695.3	)
Other comprehensive loss before reclassifications		—			—			(13.7	)		(13.7	)
Amounts reclassified from accumulated other comprehensive loss		—			13.6			—			13.6
Net current period other comprehensive income (loss)		—			13.6			(13.7	)		(0.1	)
Balance at June 30, 2019	$	(0.2	)	$	(452.3	)	$	(242.9	)	$	(695.4	)

⁽¹⁾ All amounts are net of tax and noncontrolling interests.

The net of tax amounts were determined using the jurisdictional statutory rates, and reflect effective tax rates averaging 25% to 26% for the nine months ended June 30, 2020 and 25% to 26% for the nine months ended June 30, 2019. Although we are impacted by the exchange rates of a number of currencies, foreign currency translation adjustments recorded in accumulated other comprehensive loss for the nine months ended June 30, 2020 were primarily due to losses in the Brazilian Real, Mexican Peso, Canadian dollar and Euro, each against the U.S. dollar. Foreign currency translation losses recorded in accumulated other comprehensive loss for the nine months ended June 30, 2019 were primarily due to losses in the Canadian dollar, Mexican Peso, British Pound and Euro, partially offset by gains in the Brazilian Real, each against the U.S. dollar.

The following table summarizes the reclassifications out of accumulated other comprehensive loss by component (in millions):

	Three Months Ended								Three Months Ended
	June 30, 2020								June 30, 2019
	Pretax			Tax		Net of Tax			Pretax			Tax		Net of Tax
Amortization of defined benefit pension and postretirement items: ⁽¹⁾
Actuarial losses ⁽²⁾	$	(11.4	)	$	2.6	$	(8.8	)	$	(5.9	)	$	1.5	$	(4.4	)
Prior service costs ⁽²⁾		(1.3	)		0.3		(1.0	)		(0.5	)		0.1		(0.4	)
Subtotal defined benefit plans		(12.7	)		2.9		(9.8	)		(6.4	)		1.6		(4.8	)

Derivative Instruments: ⁽¹⁾
Interest rate swap hedge loss ⁽³⁾		(1.4	)		0.3		(1.1	)		—			—		—

Total reclassifications for the period	$	(14.1	)	$	3.2	$	(10.9	)	$	(6.4	)	$	1.6	$	(4.8	)

⁽¹⁾ Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.

⁽²⁾ Included in the computation of net periodic pension cost. See “Note 5. Retirement Plans” for additional details.

⁽³⁾ These accumulated other comprehensive income components are included in Interest expense, net.

	Nine Months Ended								Nine Months Ended
	June 30, 2020								June 30, 2019
	Pretax			Tax		Net of Tax			Pretax			Tax		Net of Tax
Amortization of defined benefit pension and postretirement items: ⁽¹⁾
Actuarial losses ⁽²⁾	$	(34.5	)	$	8.7	$	(25.8	)	$	(16.6	)	$	4.3	$	(12.3	)
Prior service costs ⁽²⁾		(3.3	)		0.8		(2.5	)		(1.7	)		0.4		(1.3	)
Reclassification of stranded tax effects ⁽³⁾		—			73.4		73.4			—			—		—
Subtotal defined benefit plans		(37.8	)		82.9		45.1			(18.3	)		4.7		(13.6	)

Derivative Instruments: ⁽¹⁾
Interest rate swap hedge loss ⁽⁴⁾		(0.4	)		0.1		(0.3	)		—			—		—
Natural gas commodity hedge loss ⁽⁵⁾		(2.6	)		0.7		(1.9	)		—			—		—
Subtotal cash flow hedges		(3.0	)		0.8		(2.2	)		—			—		—

Total reclassifications for the period	$	(40.8	)	$	83.7	$	42.9		$	(18.3	)	$	4.7	$	(13.6	)

⁽¹⁾ Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.

⁽²⁾ Included in the computation of net periodic pension cost. See “Note 5. Retirement Plans” for additional details.

⁽³⁾ Amount reclassified to retained earnings as a result of the adoption of ASU 2018-02.

⁽⁴⁾ These accumulated other comprehensive income components are included in Interest expense, net.

⁽⁵⁾ These accumulated other comprehensive income components are included in Cost of goods sold.

Earnings Per Share

9 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

Note 16.

Earnings Per Share

The restricted stock awards that we grant to non-employee directors are considered participating securities as they receive non-forfeitable rights to dividends at the same rate as our Common Stock. As participating securities, we include these instruments in the earnings allocation in computing earnings per share under the two-class method described in ASC 260, “Earnings per Share.” The following table sets forth the computation of basic and diluted earnings per share under the two-class method (in millions, except per share data):

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
Numerator:
Net income attributable to common stockholders	$	178.5	$	252.6	$	465.1		$	552.1
Less: Distributed and undistributed income available to participating securities		—		—		(0.1	)		—
Distributed and undistributed income available to common stockholders	$	178.5	$	252.6	$	465.0		$	552.1

Denominator:
Basic weighted average shares outstanding		259.4		257.3		258.9			256.2
Effect of dilutive stock options and non- participating securities		1.0		1.3		1.3			2.9
Diluted weighted average shares outstanding		260.4		258.6		260.2			259.1

Basic earnings per share attributable to common stockholders	$	0.69	$	0.98	$	1.80		$	2.15
Diluted earnings per share attributable to common stockholders	$	0.69	$	0.98	$	1.79		$	2.13

Approximately 4.0 million and 1.4 million awards in the three months ended June 30, 2020 and June 30, 2019, respectively, were not included in computing diluted earnings per share because the effect would have been antidilutive. Approximately 2.2 million and 1.3 million awards in the nine months ended June 30, 2020 and June 30, 2019, respectively, were not included in computing diluted earnings per share because the effect would have been antidilutive.

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Our independent registered public accounting firm has not audited our accompanying interim financial statements. We derived the condensed consolidated balance sheet at September 30, 2019 from the audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019 (the “Fiscal 2019 Form 10-K”). In the opinion of our management, the condensed consolidated financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of our statements of income for the three and nine months ended June 30, 2020 and June 30, 2019, our statements of comprehensive income for the three and nine months ended June 30, 2020 and June 30, 2019, our balance sheets at June 30, 2020 and September 30, 2019, our statements of cash flows for the nine months ended June 30, 2020 and June 30, 2019, and our statements of equity for the three and nine months ended June 30, 2020 and June 30, 2019. We have condensed or omitted certain notes and other information from the interim financial statements presented in this report. Therefore, these interim financial statements should be read in conjunction with the Fiscal 2019 Form 10-K. The results for the three and nine months ended June 30, 2020 are not necessarily indicative of results that may be expected for the full year.
Reclassifications and Adjustments	Reclassifications and Adjustments During fiscal 2020, we evaluated our revolving credit facilities and determined that the borrowings and repayments for certain facilities should be presented gross instead of net on the condensed consolidated statements of cash flow and corrected the presentation of the prior year by an immaterial amount. COVID-19 Pandemic The global impact of the COVID-19 pandemic (“COVID-19”) continues to evolve rapidly. The pandemic has affected our operational and financial performance and the extent of its effect on our operational and financial performance will continue to depend on future developments, which are highly uncertain and cannot be predicted with confidence, including the duration, scope and severity of the pandemic, the actions taken to contain or mitigate its impact, and the direct and indirect economic effects of the pandemic and related containment measures, among others. At June 30, 2020, we evaluated the current economic environment, including our current assessment of the impact of COVID-19, and there were no indicators of impairment of our long-lived assets, including goodwill that required a quantitative test to be performed. Our estimates involve numerous assumptions about the future growth and potential volatility in revenues and costs, capital expenditures, industry and global economic factors, interest rate environment and future business strategy. Accordingly, our accounting estimates may materially change from period to period due to changing market factors, including those driven by COVID-19. We will continue to monitor future events, changes in circumstances and the potential impact thereof, including performing our annual goodwill impairment assessment in the fourth quarter of fiscal 2020. If actual results are not consistent with our assumptions and estimates, we may be exposed to impairment losses that could be material. See “Note 1. Description of Business and Summary of Significant Accounting Policies — Goodwill and Long-Lived Assets” in the Fiscal 2019 Form 10-K for additional information regarding the results of, and our methods and assumptions applied to perform, our goodwill impairment testing in fiscal 2019.
Significant Accounting Policies	Significant Accounting Policies See “Note 1. Description of Business and Summary of Significant Accounting Policies” of the Notes to Consolidated Financial Statements section in the Fiscal 2019 Form 10-K for a summary of our significant accounting policies.
New Accounting Standards - Recently Adopted	New Accounting Standards — Recently Adopted In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”. The amendments in this update provide financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in the period of adoption or retrospectively in each period in which the effect of the change in the U.S. federal corporate income tax rate in the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”) (or portion thereof) is recorded. We adopted the provisions of this ASU on October 1, 2019. Upon adoption, we elected to reclassify stranded tax effects of the Tax Act within accumulated other comprehensive income to retained earnings. The reclassification of stranded tax effects from accumulated other comprehensive income increased retained earnings by $73.4 million, all of which related to our employee benefit plans. In February 2016, the FASB issued ASU 2016-02 “Leases”, which is codified in Accounting Standards Codification (“ASC”) 842 “Leases” (“ASC 842”) and supersedes current lease guidance in ASC 840 “Leases”. This ASU requires lessees to put a ROU asset and lease liability on their balance sheet for operating and financing leases that have a term of more than one year. Expense will be recognized in the income statement similar to current accounting guidance. For lessors, this ASU modifies the classification criteria and the accounting for sales-type and direct financing leases. Entities need to disclose qualitative and quantitative information about their leases, including characteristics and amounts recognized in the financial statements. We adopted the provisions of ASC 842 on October 1, 2019 using the modified retrospective approach and, as a result, did not restate prior periods. See “Note 13. Leases” for additional details.
New Accounting Standards - Recently Issued	New Accounting Standards — Recently Issued See “Note 1. Description of Business and Summary of Significant Accounting Policies — New Accounting Standards — Recently Issued” of the Notes to Consolidated Financial Statements section of the Fiscal 2019 Form 10-K for information on new accounting standards issued prior to the beginning of fiscal 2020 but not yet adopted and where we do not expect that the adoption will have a material impact on our consolidated financial statements. Below is a description of new accounting standards for which we (i) are in the process of evaluating the impact on our consolidated financial statements, (ii) have determined that the new standard could have a material impact on our consolidated financial statements or (iii) have determined since the Fiscal 2019 Form 10-K that we do not expect the adoption of the new standard will have a material impact on our consolidated financial statements. We have not elected to early adopt any of the new accounting standards described below to the extent early adoption is permitted. In March 2020, the FASB issued ASU 2020-04 “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting”. This ASU provides temporary optional expedients and exceptions for applying Generally Accepted Accounting Principles (“GAAP”) guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate. The ASU can be adopted after its issuance date through December 31, 2022. We are currently evaluating the impact of this ASU. In December 2019, the FASB issued ASU 2019-12 “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes”. This ASU simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740 under GAAP. This ASU also improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective for fiscal years beginning after December 15, 2020 (fiscal 2022 for us) and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of this ASU. In October 2018, the FASB issued ASU 2018-17 “Consolidation: Targeted Improvements to Related Party Guidance for Variable Interest Entities.” This ASU changes how entities evaluate decision-making fees under the variable interest entity guidance. To determine whether decision-making fees represent a variable interest, an entity considers indirect interests held through related parties under common control on a proportionate basis, rather than in their entirety, as currently required under GAAP. This ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us) and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In October 2018, the FASB issued ASU 2018-18 “Collaborative Arrangements (Topic 808): Clarifying the Interaction Between Topic 808 and Topic 606”, which provides targeted amendments to ASC 808, “Collaborative arrangements” (“ASC 808”) and ASC 606 “Revenue from Contracts with Customers” (“ASC 606”). The amendments in this ASU require transactions between participants in a collaborative arrangement to be accounted for under ASC 606 when the counterparty is a customer. This ASU precludes an entity from presenting consideration from a transaction in a collaborative arrangement as revenue from contracts with customers if the counterparty is not a customer for that transaction. This ASU also amends ASC 808 to refer to the unit-of-account guidance in ASC 606 and requires it to be used only when assessing whether a transaction is in scope of ASC 606. This ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us) and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-15 “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract”. The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by these amendments. The provisions may be adopted prospectively or retrospectively. This ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us), and interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-14 “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans”. The amendments in this ASU modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans to remove disclosures that no longer are considered cost beneficial, clarify the specific requirements of disclosures and add disclosure requirements identified as relevant. These provisions will be applied retrospectively. This ASU is effective for fiscal years ending after December 15, 2020 (fiscal 2021 for us). Early adoption is permitted. We are currently evaluating the impact of this ASU. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment”, which amends the guidance in ASC 350, “Intangibles Goodwill and Other”. The ASU eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. The ASU is effective for annual and interim impairment tests performed for fiscal years beginning after December 15, 2019 (fiscal 2021 for us). Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. The ASU is applied prospectively after adoption. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In June 2016, the FASB issued ASU 2016-13 “Financial Instruments – Credit losses: Measurement of Credit Losses on financial Instruments (Topic 326)” (“ASU 2016-13”), which modifies the measurement of expected credit losses of certain financial instruments. The ASU is effective for fiscal years beginning after December 15, 2019 (fiscal 2021 for us), including interim periods within those fiscal years, and will be applied as a cumulative effect adjustment to retained earnings as of the beginning of the first reporting period for which the guidance is effective. In April 2019, the FASB issued ASU 2019-04 “Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” (“ASU 2019-04”), which addresses issues related to accrued interest receivable balances, recoveries, variable interest rates and prepayments, among other things. In May 2019, the FASB issued ASU 2019-05 “Financial Instruments – Credit Losses (Topic 326): Targeted Transition Relief” (“ASU 2019-05”), which provides targeted transition relief allowing entities to make an irrevocable one-time election upon adoption of the new credit losses standard to measure financial assets previously measured at amortized cost (except held-to-maturity securities) using the fair value option. In November 2019, the FASB issued ASU 2019-11 “Codification Improvements to Topic 326, Financial Instruments – Credit Losses” (“ASU 2019-11”), which makes certain narrow-scope amendments to Topic 326, including allowing entities to exclude accrued interest amounts from various required disclosures under Topic 326. In February 2020, the FASB issued ASU 2020-02 “Financial Instruments – Credit Losses (Topic 326) and Leases (Topic 842)” (“ASU 2020-02”), which adds and amends paragraphs in the Accounting Standards Codification to reflect the issuance of U.S. Securities and Exchange Commission (“SEC”) Staff Accounting Bulletin No. 119 primarily related to the new credit losses standard. The provisions of ASU 2019-04, ASU 2019-05, ASU 2019-11 and ASU 2020-02 related to Topic 326 are effective concurrent with the adoption of ASU 2016-13. While we are completing our analysis, we do not expect the adoption of these ASUs to have a material impact on our consolidated financial statements.

Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2020

Revenue From Contract With Customer [Abstract]

Schedule of Disaggregates Revenue by Geographical Market and Product Type (Segment)

The tables below disaggregate our revenue by geographical market and product type (segment).

	Three Months Ended June 30, 2020
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	2,632.4	$	1,238.4	$	—	$	(44.8	)	$	3,826.0
South America		87.8		14.1		—		—			101.9
Europe		0.6		233.8		—		(0.2	)		234.2
Asia Pacific		8.0		66.3		—		(0.1	)		74.2
Total	$	2,728.8	$	1,552.6	$	—	$	(45.1	)	$	4,236.3

	Nine Months Ended June 30, 2020
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	8,187.0	$	3,718.8	$	18.9	$	(137.7	)	$	11,787.0
South America		296.1		52.9		—		—			349.0
Europe		4.9		731.8		—		(0.2	)		736.5
Asia Pacific		32.8		202.3		—		(0.3	)		234.8
Total	$	8,520.8	$	4,705.8	$	18.9	$	(138.2	)	$	13,107.3

	Three Months Ended June 30, 2019
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	2,954.6	$	1,306.0	$	8.6	$	(41.3	)	$	4,227.9
South America		102.8		14.8		—		—			117.6
Europe		0.7		259.3		—		(0.1	)		259.9
Asia Pacific		14.7		70.0		—		(0.1	)		84.6
Total	$	3,072.8	$	1,650.1	$	8.6	$	(41.5	)	$	4,690.0

	Nine Months Ended June 30, 2019
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total

Primary Geographical Markets
North America	$	8,426.3	$	3,870.7	$	23.3	$	(119.0	)	$	12,201.3
South America		321.2		52.2		—		—			373.4
Europe		0.7		789.4		—		(0.1	)		790.0
Asia Pacific		49.1		224.9		—		(1.3	)		272.7
Total	$	8,797.3	$	4,937.2	$	23.3	$	(120.4	)	$	13,637.4

Summary of Opening and Closing Balances of Contract Assets and Contract Liabilities

The opening and closing balances of our contract assets and contract liabilities are as follows. Contract assets and contract liabilities are aggregated within Other current assets and Other current liabilities, respectively, on the condensed consolidated balance sheet.

(In millions)	Contract Assets (Short-Term)		Contract Liabilities (Short-Term)

Beginning balance - October 1, 2019	$	188.0	$	7.7
Ending balance - June 30, 2020		202.0		16.9
Increase / (Decrease)	$	14.0	$	9.2

Acquisitions (Tables) - KapStone Acquisition [Member]

9 Months Ended

Jun. 30, 2020

Acquired Finite Lived Intangible Assets [Line Items]

Summary of Fair Values of Assets Acquired and Liabilities Assumed by Major Class of Assets and Liabilities and Measurement Period Adjustments

The following table summarizes the fair values of the assets acquired and liabilities assumed in the KapStone Acquisition by major class of assets and liabilities as of the acquisition date, as well as adjustments made during fiscal 2019 and fiscal 2020 (referred to as “measurement period adjustments”) (in millions):

	Amounts Recognized as of the Acquisition Date		Measurement Period Adjustments ⁽¹⁾			Amounts Recognized as of Acquisition Date (as Adjusted)⁽²⁾
Cash and cash equivalents	$	8.6	$	—		$	8.6
Current assets, excluding cash and cash equivalents		878.9		(30.2	)		848.7
Property, plant and equipment, net		1,910.3		11.5			1,921.8
Goodwill		1,755.0		0.5			1,755.5
Intangible assets		1,336.1		30.3			1,366.4
Other long-term assets		27.9		(0.1	)		27.8
Total assets acquired		5,916.8		12.0			5,928.8

Current portion of debt		33.3		—			33.3
Current liabilities		337.5		7.9			345.4
Long-term debt due after one year		1,333.4		—			1,333.4
Accrued pension and other long-term benefits		9.8		2.8			12.6
Deferred income taxes		609.7		(1.4	)		608.3
Other long-term liabilities		118.4		2.7			121.1
Total liabilities assumed		2,442.1		12.0			2,454.1
Net assets acquired	$	3,474.7	$	—		$	3,474.7

⁽¹⁾	^{The measurement period adjustments recorded in fiscal 2019 and fiscal 2020 did not have a significant impact on our condensed consolidated statements of income in any period.}

⁽²⁾

^{The measurement period adjustments were primarily due to refinements to third party appraisals and carrying amounts of certain assets and liabilities, as well as adjustments to certain tax accounts based on, among other things, adjustments to deferred tax liabilities. The net impact of the measurement period adjustments to goodwill were essentially flat.}

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination

The following table summarizes the weighted average life and the fair value of intangible assets recognized in the KapStone Acquisition, excluding goodwill (in millions, except lives):

	Weighted Avg. Life		Gross Carrying Amount
Customer relationships		11.7	$	1,303.0
Trademarks and tradenames		16.9		54.2
Favorable contracts		6.0		9.2
Total		11.9	$	1,366.4

Restructuring and Other Costs (Tables)

9 Months Ended

Jun. 30, 2020

Restructuring And Other Costs [Abstract]

Schedule of Restructuring and Other Costs

The following table summarizes our Restructuring and other costs (in millions):

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Restructuring	$	7.4	$	6.4	$	40.1	$	56.4
Other		2.3		11.5		16.1		50.7
Restructuring and other costs	$	9.7	$	17.9	$	56.2	$	107.1

Schedule of Restructuring Charges Related to Active Restructuring Initiatives

The following table presents a summary of restructuring charges related to active restructuring initiatives that we incurred during the three and nine months ended June 30, 2020 and 2019, the cumulative recorded amount since we started the initiatives and our estimate of the total costs we expect to incur (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020		2019		Cumulative		Total Expected
Corrugated Packaging

Net property, plant and equipment costs	$	(0.3	)	$	(1.9	)	$	2.2	$	5.2	$	96.3	$	96.3
Severance and other employee costs		3.2			1.6			6.8		12.3		41.3		41.3
Equipment and inventory relocation costs		0.2			1.6			1.5		3.0		9.8		10.5
Facility carrying costs		0.4			0.6			1.4		2.6		19.9		20.6
Other costs		0.1			(0.1	)		0.5		0.2		5.7		5.9
Restructuring total	$	3.6		$	1.8		$	12.4	$	23.3	$	173.0	$	174.6

Consumer Packaging

Net property, plant and equipment costs	$	—		$	0.2		$	0.5	$	—	$	30.1	$	30.1
Severance and other employee costs		1.9			1.2			15.0		4.0		53.4		53.4
Equipment and inventory relocation costs		—			0.2			0.1		0.9		6.0		6.5
Facility carrying costs		—			0.2			—		0.2		1.9		1.9
Other costs		1.2			0.3			1.8		3.5		10.4		11.6
Restructuring total	$	3.1		$	2.1		$	17.4	$	8.6	$	101.8	$	103.5

Land and Development

Net property, plant and equipment costs	$	—		$	—		$	—	$	—	$	1.8	$	1.8
Severance and other employee costs		—			—			—		0.1		13.8		13.8
Other costs		—			—			—		—		3.0		3.0
Restructuring total	$	—		$	—		$	—	$	0.1	$	18.6	$	18.6

Corporate

Severance and other employee costs	$	0.1			2.4			9.0		22.2	$	47.3	$	47.3
Other costs		0.6			0.1			1.3		2.2		8.7		8.7
Restructuring total	$	0.7		$	2.5		$	10.3	$	24.4	$	56.0	$	56.0

Total

Net property, plant and equipment costs	$	(0.3	)	$	(1.7	)	$	2.7	$	5.2	$	128.2	$	128.2
Severance and other employee costs		5.2			5.2			30.8		38.6		155.8		155.8
Equipment and inventory relocation costs		0.2			1.8			1.6		3.9		15.8		17.0
Facility carrying costs		0.4			0.8			1.4		2.8		21.8		22.5
Other costs		1.9			0.3			3.6		5.9		27.8		29.2
Restructuring total	$	7.4		$	6.4		$	40.1	$	56.4	$	349.4	$	352.7

Schedule of Acquisition, Divestiture and Integration Costs

The following table presents our acquisition, integration and divestiture costs (in millions):

	Three Months Ended					Nine Months Ended
	June 30,					June 30,
	2020			2019		2020		2019
Acquisition costs	$	(0.2	)	$	0.9	$	0.2	$	27.9
Integration costs		2.5			10.6		15.9		22.6
Divestiture costs		—			—		—		0.2
Other total	$	2.3		$	11.5	$	16.1	$	50.7

Schedule of Changes in Restructuring Accrual and Reconciliation of Accrual Charges

The following table summarizes the changes in the restructuring accrual, which is primarily composed of accrued severance and other employee costs, and presents a reconciliation of the restructuring accrual charges to the line item “Restructuring and other costs” on our condensed consolidated statements of income (in millions):

	Nine Months Ended
	June 30,
	2020			2019
Accrual at beginning of fiscal year	$	32.3		$	31.6
Additional accruals		31.7			37.5
Payments		(35.3	)		(32.9	)
Adjustment to accruals		(1.1	)		(3.1	)
Foreign currency rate changes		—			0.1
Accrual at June 30	$	27.6		$	33.2

Reconciliation of accruals and charges to restructuring and other costs (in millions):

	Nine Months Ended
	June 30,
	2020			2019
Additional accruals and adjustments to accruals (see table above)	$	30.6		$	34.4
Acquisition costs		0.2			27.9
Integration costs		15.9			22.6
Divestiture costs		—			0.2
Net property, plant and equipment costs		2.7			5.2
Severance and other employee costs		(0.1	)		6.9
Equipment and inventory relocation costs		1.6			3.9
Facility carrying costs		1.4			2.8
Other costs		3.9			3.2
Total restructuring and other costs	$	56.2		$	107.1

Retirement Plans (Tables)

9 Months Ended

Jun. 30, 2020

Retirement Plans [Abstract]

Summary of Components of Net Pension Income and Summary of Components of Postretirement Benefit Cost

Pension and Postretirement Income / Expense

The following table presents a summary of the components of net pension income (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Service cost	$	11.9		$	10.2		$	39.2		$	32.5
Interest cost		49.7			58.8			149.1			174.0
Expected return on plan assets		(90.1	)		(85.9	)		(271.7	)		(254.7	)
Amortization of net actuarial loss		11.4			6.3			35.1			18.7
Amortization of prior service cost		1.9			1.3			5.4			3.9
Curtailment loss		—			0.1			0.4			1.0
Company defined benefit plan income		(15.2	)		(9.2	)		(42.5	)		(24.6	)
Multiemployer pension withdrawal income		(2.0	)		(1.7	)		(1.1	)		(1.7	)
Multiemployer and other plans		0.3			0.2			1.0			0.5
Net pension income	$	(16.9	)	$	(10.7	)	$	(42.6	)	$	(25.8	)

The following table presents a summary of the components of the net postretirement cost (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Service cost	$	0.3		$	0.2		$	1.0		$	0.8
Interest cost		1.7			1.9			5.3			5.8
Amortization of net actuarial loss (gain)		0.5			(0.7	)		0.1			(1.5	)
Amortization of prior service credit		(0.7	)		(0.7	)		(2.1	)		(2.1	)
Net postretirement cost	$	1.8		$	0.7		$	4.3		$	3.0

Segment Information (Tables)

9 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Certain Operating Data for Segments

The following tables show selected operating data for our segments (in millions):

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Net sales (aggregate):
Corrugated Packaging	$	2,728.8		$	3,072.8		$	8,520.8		$	8,797.3
Consumer Packaging		1,552.6			1,650.1			4,705.8			4,937.2
Land and Development		—			8.6			18.9			23.3
Total	$	4,281.4		$	4,731.5		$	13,245.5		$	13,757.8
Less net sales (intersegment):
Corrugated Packaging	$	15.3		$	19.7		$	54.3		$	57.1
Consumer Packaging		29.8			21.8			83.9			63.3
Total	$	45.1		$	41.5		$	138.2		$	120.4
Net sales (unaffiliated customers):
Corrugated Packaging	$	2,713.5		$	3,053.1		$	8,466.5		$	8,740.2
Consumer Packaging		1,522.8			1,628.3			4,621.9			4,873.9
Land and Development		—			8.6			18.9			23.3
Total	$	4,236.3		$	4,690.0		$	13,107.3		$	13,637.4
Segment income:
Corrugated Packaging	$	227.9		$	392.7		$	755.8		$	949.8
Consumer Packaging		95.3			91.0			232.3			253.1
Land and Development		—			1.6			1.4			2.8
Segment income		323.2			485.3			989.5			1,205.7
(Loss) gain on sale of certain closed facilities		—			(2.7	)		5.5			47.8
Multiemployer pension withdrawal income		2.0			1.7			1.1			1.7
Land and Development impairments		—			—			—			(13.0	)
Restructuring and other costs		(9.7	)		(17.9	)		(56.2	)		(107.1	)
Non-allocated expenses		(18.3	)		(24.4	)		(54.1	)		(67.8	)
Interest expense, net		(92.4	)		(111.1	)		(283.2	)		(317.3	)
Loss on extinguishment of debt		(0.6	)		(3.2	)		(1.1	)		(4.7	)
Other (expense) income, net		(5.0	)		3.7			(9.6	)		(2.3	)
Income before income taxes	$	199.2		$	331.4		$	591.9		$	743.0

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Depreciation and amortization:
Corrugated Packaging	$	233.1	$	241.4	$	717.0	$	702.6
Consumer Packaging		131.2		140.7		399.7		418.5
Corporate		1.4		3.2		4.7		7.0
Total	$	365.7	$	385.3	$	1,121.4	$	1,128.1

Inventories (Tables)

9 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Schedule of Inventories

The components of inventories were as follows (in millions):

	June 30, 2020			September 30, 2019
Finished goods and work in process	$	937.1		$	938.9
Raw materials		788.0			818.8
Spare parts and supplies		513.8			479.7
Inventories at FIFO cost		2,238.9			2,237.4
LIFO reserve		(101.2	)		(129.9	)
Net inventories	$	2,137.7		$	2,107.5

Property, Plant and Equipment (Tables)

9 Months Ended

Jun. 30, 2020

Property Plant And Equipment [Abstract]

Schedule of Property, Plant and Equipment

The components of property, plant and equipment were as follows (in millions):

	June 30, 2020			September 30, 2019
Property, plant and equipment at cost:
Land and buildings	$	2,507.3		$	2,442.3
Machinery and equipment		15,044.2			14,743.6
Forestlands and mineral rights		114.1			144.0
Transportation equipment		28.8			31.2
Leasehold improvements		102.8			100.2
		17,797.2			17,461.3
Less: accumulated depreciation, depletion and amortization		(6,874.6	)		(6,271.8	)
Property, plant and equipment, net	$	10,922.6		$	11,189.5

Fair Value (Tables)

9 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Summary of Activity Under A/R Sales Agreement

The following table presents a summary of the activity under the A/R Sales Agreement for the nine months ended June 30, 2020 and June 30, 2019 (in millions):

	Nine Months Ended
	June 30,
	2020			2019
Receivable from financial institution at beginning of fiscal year	$	—		$	—
Receivables sold to the financial institution and derecognized		1,847.8			1,453.5
Receivables collected by financial institution		(1,844.7	)		(1,441.6	)
Cash paid to financial institution		(3.1	)		(11.9	)
Receivable from financial institution at June 30	$	—		$	—

Debt (Tables)

9 Months Ended

Jun. 30, 2020

Debt [Abstract]

Schedule of Carrying Value of Individual Components of Debt

The following table shows the carrying value of the individual components of our debt (in millions):

	June 30, 2020		September 30, 2019
Public bonds due fiscal 2020 to 2022	$	399.2	$	507.8
Public bonds due fiscal 2023 to 2028		3,772.4		3,769.1
Public bonds due fiscal 2029 to 2033		2,781.9		2,197.6
Public bonds due fiscal 2037 to 2047		178.7		179.0
Term loan facilities		1,797.1		2,295.5
Revolving credit and swing facilities		285.0		396.0
Commercial paper		329.9		339.2
Finance lease obligations		277.8		185.8
Supplier financing and commercial card programs		101.0		123.2
International and other debt		130.4		70.2
Total debt		10,053.4		10,063.4
Less: current portion of debt		213.1		561.1
Long-term debt due after one year	$	9,840.3	$	9,502.3

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
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-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors (Tables)

9 Months Ended

Jun. 30, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Condensed Consolidating Statements of Operations

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Three Months Ended June 30, 2020
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	604.9		$	4,293.6		$	(662.2	)	$	4,236.3
Cost of goods sold		—		—			485.3			3,635.4			(654.4	)		3,466.3
Gross profit		—		—			119.6			658.2			(7.8	)		770.0
Selling, general and administrative, excluding intangible amortization		—		0.4			18.6			371.1			—			390.1
Selling, general and administrative intangible amortization		—		—			24.5			75.1			—			99.6
(Gain) loss on disposal of assets		—		—			(0.1	)		1.1			—			1.0
Multiemployer pension withdrawal income		—		—			(2.0	)		—			—			(2.0	)
Restructuring and other costs		—		—			—			9.7			—			9.7
Operating profit (loss)		—		(0.4	)		78.6			201.2			(7.8	)		271.6
Interest (expense) income, net		—		(60.6	)		(33.5	)		1.7			—			(92.4	)
Intercompany interest (expense) income, net		—		(1.5	)		(17.8	)		11.5			7.8			—
Loss on extinguishment of debt		—		(0.6	)		—			—			—			(0.6	)
Pension and other postretirement non- service (expense) income		—		—			(1.4	)		27.0			—			25.6
Other income (expense), net		—		0.5			—			(5.5	)		—			(5.0	)
Equity in income of consolidated entities		178.5		272.7			195.8			—			(647.0	)		—
Income before income taxes		178.5		210.1			221.7			235.9			(647.0	)		199.2
Income tax benefit (expense)		—		15.6			(0.6	)		(34.2	)		—			(19.2	)
Consolidated net income		178.5		225.7			221.1			201.7			(647.0	)		180.0
Less: Net income attributable to noncontrolling interests		—		—			—			(1.5	)		—			(1.5	)
Net income attributable to common stockholders	$	178.5	$	225.7		$	221.1		$	200.2		$	(647.0	)	$	178.5
Comprehensive income attributable to common stockholders	$	210.1	$	257.2		$	250.2		$	231.3		$	(738.7	)	$	210.1

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Nine Months Ended June 30, 2020
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	1,825.1		$	13,233.2		$	(1,951.0	)	$	13,107.3
Cost of goods sold		—		—			1,469.1			11,181.4			(1,927.0	)		10,723.5
Gross profit		—		—			356.0			2,051.8			(24.0	)		2,383.8
Selling, general and administrative, excluding intangible amortization		—		0.7			75.3			1,158.4			—			1,234.4
Selling, general and administrative intangible amortization		—		—			75.0			226.5			—			301.5
Gain on disposal of assets		—		—			(0.1	)		(5.8	)		—			(5.9	)
Multiemployer pension withdrawal income		—		—			(1.9	)		0.8			—			(1.1	)
Restructuring and other costs		—		3.6			—			52.6			—			56.2
Operating profit (loss)		—		(4.3	)		207.7			619.3			(24.0	)		798.7
Interest (expense) income, net		—		(189.1	)		(102.3	)		8.2			—			(283.2	)
Intercompany interest (expense) income, net		—		(8.3	)		(67.2	)		51.5			24.0			—
Loss on extinguishment of debt		—		(1.0	)		—			(0.1	)		—			(1.1	)
Pension and other postretirement non- service (expense) income		—		—			(5.2	)		83.6			—			78.4
Other income (expense), net		0.1		0.5			1.3			(11.5	)		—			(9.6	)
Equity in income of unconsolidated entities		—		—			—			8.7			—			8.7
Equity in income of consolidated entities		465.0		751.6			445.2			—			(1,661.8	)		—
Income before income taxes		465.1		549.4			479.5			759.7			(1,661.8	)		591.9
Income tax benefit (expense)		—		50.4			(2.3	)		(171.6	)		—			(123.5	)
Consolidated net income		465.1		599.8			477.2			588.1			(1,661.8	)		468.4
Less: Net income attributable to noncontrolling interests		—		—			—			(3.3	)		—			(3.3	)
Net income attributable to common stockholders	$	465.1	$	599.8		$	477.2		$	584.8		$	(1,661.8	)	$	465.1
Comprehensive income attributable to common stockholders	$	220.3	$	355.9		$	238.6		$	347.4		$	(941.9	)	$	220.3

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Three Months Ended June 30, 2019
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	643.0		$	4,676.3		$	(629.3	)	$	4,690.0
Cost of goods sold		—		—			475.6			3,844.9			(619.4	)		3,701.1
Gross profit		—		—			167.4			831.4			(9.9	)		988.9
Selling, general and administrative, excluding intangible amortization		—		(0.4	)		26.0			416.8			—			442.4
Selling, general and administrative intangible amortization		—		—			26.1			76.3			—			102.4
Loss on disposal of assets		—		—			0.1			6.4			—			6.5
Multiemployer pension withdrawal income		—		—			—			(1.7	)		—			(1.7	)
Restructuring and other costs		—		1.4			0.1			16.4			—			17.9
Operating profit (loss)		—		(1.0	)		115.1			317.2			(9.9	)		421.4
Interest expense, net		—		(66.5	)		(36.9	)		(7.7	)		—			(111.1	)
Intercompany interest (expense) income, net		—		(2.5	)		(33.3	)		25.9			9.9			—
Loss on extinguishment of debt		—		(0.8	)		(2.3	)		(0.1	)		—			(3.2	)
Pension and other postretirement non- service (expense) income		—		—			(1.4	)		20.3			—			18.9
Other (expense) income, net		—		—			(35.2	)		38.9			—			3.7
Equity in income of unconsolidated entities		—		—			—			1.7			—			1.7
Equity in income (loss) of consolidated entities		252.6		276.9			(11.4	)		—			(518.1	)		—
Income (loss) before income taxes		252.6		206.1			(5.4	)		396.2			(518.1	)		331.4
Income tax benefit (expense)		—		17.9			(1.9	)		(93.6	)		—			(77.6	)
Consolidated net income (loss)		252.6		224.0			(7.3	)		302.6			(518.1	)		253.8
Less: Net income attributable to noncontrolling interests		—		—			—			(1.2	)		—			(1.2	)
Net income (loss) attributable to common stockholders	$	252.6	$	224.0		$	(7.3	)	$	301.4		$	(518.1	)	$	252.6
Comprehensive income attributable to common stockholders	$	282.7	$	253.7		$	20.7		$	331.8		$	(606.2	)	$	282.7

CONDENSED CONSOLIDATING STATEMENTS OF INCOME

	Nine Months Ended June 30, 2019
(In millions)	Parent		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Net sales	$	—	$	—		$	1,906.0		$	13,648.2		$	(1,916.8	)	$	13,637.4
Cost of goods sold		—		—			1,503.3			11,370.7			(1,906.9	)		10,967.1
Gross profit		—		—			402.7			2,277.5			(9.9	)		2,670.3
Selling, general and administrative, excluding intangible amortization		—		—			53.3			1,234.1			—			1,287.4
Selling, general and administrative intangible amortization		—		—			78.4			219.3			—			297.7
Loss (gain) on disposal of assets		—		—			0.1			(37.4	)		—			(37.3	)
Multiemployer pension withdrawal income		—		—			—			(1.7	)		—			(1.7	)
Land and Development impairments		—		—			—			13.0			—			13.0
Restructuring and other costs		—		5.3			0.2			101.6			—			107.1
Operating profit (loss)		—		(5.3	)		270.7			748.6			(9.9	)		1,004.1
Interest expense, net		—		(178.5	)		(128.8	)		(10.0	)		—			(317.3	)
Intercompany interest income (expense), net		—		1.0			(87.9	)		77.0			9.9			—
Loss on extinguishment of debt		—		(2.6	)		(1.9	)		(0.2	)		—			(4.7	)
Pension and other postretirement non- service (expense) income		—		—			(4.8	)		59.7			—			54.9
Other (expense) income, net		—		(4.0	)		(35.6	)		37.3			—			(2.3	)
Equity in income of unconsolidated entities		—		—			—			8.3			—			8.3
Equity in income of consolidated entities		552.1		671.1			403.0			—			(1,626.2	)		—
Income before income taxes		552.1		481.7			414.7			920.7			(1,626.2	)		743.0
Income tax benefit (expense)		—		46.9			(3.2	)		(231.2	)		—			(187.5	)
Consolidated net income		552.1		528.6			411.5			689.5			(1,626.2	)		555.5
Less: Net income attributable to noncontrolling interests		—		—			—			(3.4	)		—			(3.4	)
Net income attributable to common stockholders	$	552.1	$	528.6		$	411.5		$	686.1		$	(1,626.2	)	$	552.1
Comprehensive income attributable to common stockholders	$	552.0	$	530.6		$	415.9		$	687.0		$	(1,633.5	)	$	552.0

Condensed Consolidating Balance Sheets

CONDENSED CONSOLIDATING BALANCE SHEETS

	June 30, 2020
(In millions)	Parent		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated Total

ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	—	$	178.4	$	113.1	$	—		$	291.5
Accounts receivable		—		—		38.9		2,092.7		(48.4	)		2,083.2
Inventories		—		—		239.9		1,897.8		—			2,137.7
Other current assets		0.5		—		6.3		483.4		—			490.2
Intercompany receivables		—		24.0		0.3		1,372.8		(1,397.1	)		—
Assets held for sale		—		—		—		3.3		—			3.3
Total current assets		0.5		24.0		463.8		5,963.1		(1,445.5	)		5,005.9
Property, plant and equipment, net		—		—		14.8		10,907.8		—			10,922.6
Goodwill		—		—		1,158.6		6,111.9		—			7,270.5
Intangibles, net		—		—		1,409.9		2,339.5		—			3,749.4
Restricted assets held by special purpose entities		—		—		—		1,269.2		—			1,269.2
Prepaid pension asset		—		—		—		305.9		—			305.9
Intercompany notes receivable		—		154.9		149.8		2,821.3		(3,126.0	)		—
Investments in consolidated subsidiaries		12,158.9		18,891.4		19,827.1		—		(50,877.4	)		—
Other assets		—		91.4		233.8		1,515.6		(86.7	)		1,754.1
Total Assets	$	12,159.4	$	19,161.7	$	23,257.8	$	31,234.3	$	(55,535.6	)	$	30,277.6

LIABILITIES AND EQUITY
Current liabilities:
Current portion of debt	$	—	$	79.9	$	—	$	133.2	$	—		$	213.1
Accounts payable		—		1.1		24.2		1,536.6		(48.4	)		1,513.5
Accrued compensation and benefits		0.2		—		14.5		362.5		—			377.2
Other current liabilities		—		51.8		107.7		523.6		—			683.1
Intercompany payables		446.1		57.7		470.6		422.7		(1,397.1	)		—
Total current liabilities		446.3		190.5		617.0		2,978.6		(1,445.5	)		2,786.9
Long-term debt due after one year		—		6,706.4		1,972.0		1,161.9		—			9,840.3
Intercompany notes payable		—		753.3		2,068.0		304.7		(3,126.0	)		—
Pension liabilities, net of current portion		—		—		141.6		129.7		—			271.3
Postretirement benefit liabilities, net of current portion		—		—		25.2		126.7		—			151.9
Non-recourse liabilities held by special purpose entities		—		—		—		1,138.7		—			1,138.7
Deferred income taxes		—		—		310.0		2,664.9		(86.7	)		2,888.2
Other long-term liabilities		—		35.3		152.5		1,281.0		—			1,468.8
Redeemable noncontrolling interests		—		—		—		1.6		—			1.6
Total stockholders’ equity		11,713.1		11,476.2		17,971.5		21,429.7		(50,877.4	)		11,713.1
Noncontrolling interests		—		—		—		16.8		—			16.8
Total equity		11,713.1		11,476.2		17,971.5		21,446.5		(50,877.4	)		11,729.9
Total Liabilities and Equity	$	12,159.4	$	19,161.7	$	23,257.8	$	31,234.3	$	(55,535.6	)	$	30,277.6

CONDENSED CONSOLIDATING BALANCE SHEETS

	September 30, 2019
(In millions)	Parent		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated Total

ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	—	$	17.8	$	133.8	$	—		$	151.6
Accounts receivable		—		—		31.1		2,201.7		(39.6	)		2,193.2
Inventories		—		—		254.3		1,853.2		—			2,107.5
Other current assets		—		1.2		11.8		483.2		—			496.2
Intercompany receivables		—		227.7		—		1,128.6		(1,356.3	)		—
Assets held for sale		—		—		—		25.8		—			25.8
Total current assets		—		228.9		315.0		5,826.3		(1,395.9	)		4,974.3
Property, plant and equipment, net		—		—		18.9		11,170.6		—			11,189.5
Goodwill		—		—		1,158.6		6,127.0		—			7,285.6
Intangibles, net		—		—		1,485.0		2,574.5		—			4,059.5
Restricted assets held by special purpose entities		—		—		—		1,274.3		—			1,274.3
Prepaid pension asset		—		—		—		224.7		—			224.7
Intercompany notes receivable		—		155.0		156.9		3,026.8		(3,338.7	)		—
Investments in consolidated subsidiaries		11,973.6		18,524.2		20,103.6		—		(50,601.4	)		—
Other assets		—		67.8		185.3		971.8		(76.1	)		1,148.8
Total Assets	$	11,973.6	$	18,975.9	$	23,423.3	$	31,196.0	$	(55,412.1	)	$	30,156.7

LIABILITIES AND EQUITY
Current liabilities:
Current portion of debt	$	—	$	135.3	$	108.9	$	316.9	$	—		$	561.1
Accounts payable		—		0.7		31.3		1,839.4		(39.6	)		1,831.8
Accrued compensation and benefits		0.3		—		14.5		455.6		—			470.4
Other current liabilities		—		18.6		83.8		469.4		—			571.8
Intercompany payables		303.4		—		1,052.9		—		(1,356.3	)		—
Total current liabilities		303.7		154.6		1,291.4		3,081.3		(1,395.9	)		3,435.1
Long-term debt due after one year		—		6,608.0		1,982.9		911.4		—			9,502.3
Intercompany notes payable		—		636.3		2,390.5		311.9		(3,338.7	)		—
Pension liabilities, net of current portion		—		—		147.6		146.4		—			294.0
Postretirement benefit liabilities, net of current portion		—		—		25.7		136.4		—			162.1
Non-recourse liabilities held by special purpose entities		—		—		—		1,145.2		—			1,145.2
Deferred income taxes		—		—		278.9		2,675.2		(76.1	)		2,878.0
Other long-term liabilities		—		12.9		131.2		909.8		—			1,053.9
Redeemable noncontrolling interests		—		—		—		1.9		—			1.9
Total stockholders’ equity		11,669.9		11,564.1		17,175.1		21,862.2		(50,601.4	)		11,669.9
Noncontrolling interests		—		—		—		14.3		—			14.3
Total equity		11,669.9		11,564.1		17,175.1		21,876.5		(50,601.4	)		11,684.2
Total Liabilities and Equity	$	11,973.6	$	18,975.9	$	23,423.3	$	31,196.0	$	(55,412.1	)	$	30,156.7

Condensed Consolidating Statements of Cash Flows

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

	Nine Months Ended June 30, 2020
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Operating activities:
Net cash provided by (used for) operating activities	$	275.9		$	(38.1	)	$	250.6		$	850.6		$	—		$	1,339.0
Investing activities:
Capital expenditures		—			—			—			(860.2	)		—			(860.2	)
Investment in unconsolidated entities		—			—			—			(1.0	)		—			(1.0	)
Proceeds from sale of property, plant and equipment		—			—			0.1			22.4			—			22.5
Proceeds from property, plant and equipment insurance settlement		—			—			—			2.4			—			2.4
Intercompany notes proceeds		—			—			5.0			—			(5.0	)		—
Other, net		—			—			9.9			1.0			—			10.9
Net cash provided by (used for) investing activities		—			—			15.0			(835.4	)		(5.0	)		(825.4	)
Financing activities:
Proceeds from issuance of notes		—			598.6			—			—			—			598.6
Additions to revolving credit facilities		—			350.0			—			63.0			—			413.0
Repayments of revolving credit facilities		—			(350.0	)		—			(128.2	)		—			(478.2	)
Additions to debt		—			—			—			683.1			—			683.1
Repayments of debt		—			(500.0	)		(105.0	)		(590.8	)		—			(1,195.8	)
Repayments of commercial paper, net		—			(9.3	)		—			—			—			(9.3	)
Other debt repayments, net		—			(46.0	)		—			(23.2	)		—			(69.2	)
Issuances of common stock, net of related minimum tax withholdings		16.7			—			—			—			—			16.7
Cash dividends paid to stockholders		(292.6	)		—			—			—			—			(292.6	)
Cash distributions paid to noncontrolling interests		—			—			—			(1.4	)		—			(1.4	)
Intercompany notes payments		—			—			—			(5.0	)		5.0			—
Other, net		—			(5.2	)		—			(11.8	)		—			(17.0	)
Net cash (used for) provided by financing activities		(275.9	)		38.1			(105.0	)		(14.3	)		5.0			(352.1	)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		—			—			—			(21.6	)		—			(21.6	)
Increase (decrease) in cash, cash equivalents and restricted cash		—			—			160.6			(20.7	)		—			139.9
Cash, cash equivalents and restricted cash at beginning of period		—			—			17.8			133.8			—			151.6
Cash, cash equivalents and restricted cash at end of period	$	—		$	—		$	178.4		$	113.1		$	—		$	291.5

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

	Nine Months Ended June 30, 2019
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Operating activities:
Net cash provided by (used for) operating activities	$	430.7		$	(512.4	)	$	445.9		$	1,035.4		$	—		$	1,399.6
Investing activities:
Capital expenditures		—			—			(2.5	)		(974.3	)		—			(976.8	)
Cash paid related to business combinations, net of cash acquired		—			—			—			(3,368.3	)		—			(3,368.3	)
Investment in unconsolidated entities		—			—			—			(10.4	)		—			(10.4	)
Proceeds from sale of property, plant and equipment		—			—			—			108.3			—			108.3
Proceeds from property, plant and equipment insurance settlement		—			—			—			16.5			—			16.5
Intercompany notes issued		—			—			(0.1	)		(75.7	)		75.8			—
Intercompany notes proceeds		—			9.2			4.3			3,870.2			(3,883.7	)		—
Intercompany capital investment		(563.0	)		(563.0	)		—			—			1,126.0			—
Other, net		—			—			28.2			1.8			—			30.0
Net cash (used for) provided by investing activities		(563.0	)		(553.8	)		29.9			(431.9	)		(2,681.9	)		(4,200.7	)
Financing activities:
Proceeds from issuance of notes		—			2,498.2			—			—			—			2,498.2
Additions to revolving credit facilities		—			67.2			—			125.0			—			192.2
Repayments of revolving credit facilities		—			(67.2	)		—			(110.0	)		—			(177.2	)
Additions to debt		—			4,101.8			(1.0	)		340.2			—			4,441.0
Repayments of debt		—			(2,187.1	)		(958.6	)		(1,519.3	)		—			(4,665.0	)
Additions to commercial paper, net		—			445.6			—			—			—			445.6
Other debt additions, net		—			35.3			—			10.6			—			45.9
Issuances of common stock, net of related minimum tax withholdings		8.6			—			—			—			—			8.6
Purchases of common stock		(88.6	)		—			—			—			—			(88.6	)
Cash dividends paid to stockholders		(350.7	)		—			—			—			—			(350.7	)
Cash distributions paid to noncontrolling interests		—			—			—			(3.4	)		—			(3.4	)
Intercompany notes borrowing		—			—			75.7			0.1			(75.8	)		—
Intercompany notes payments		—			(3,800.0	)		(70.2	)		(13.5	)		3,883.7			—
Intercompany capital receipt		563.0			—			—			563.0			(1,126.0	)		—
Other, net		—			(27.8	)		—			20.7			—			(7.1	)
Net cash provided by (used for) financing activities		132.3			1,066.0			(954.1	)		(586.6	)		2,681.9			2,339.5
Effect of exchange rate changes on cash, cash equivalents and restricted cash		—			—			—			3.9			—			3.9
(Decrease) increase in cash, cash equivalents and restricted cash		—			(0.2	)		(478.3	)		20.8			—			(457.7	)
Cash, cash equivalents and restricted cash at beginning of period		—			0.2			490.8			145.8			—			636.8
Cash, cash equivalents and restricted cash at end of period	$	—		$	—		$	12.5		$	166.6		$	—		$	179.1

Summary of Non-Cash Transactions

The table below summarizes these non-cash transactions.

	Nine Months Ended June 30, 2020
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Investing activities:
Intercompany notes issued	$	—		$	—		$	(63.6	)	$	(117.0	)	$	180.6		$	—
Intercompany notes proceeds	$	—		$	—		$	65.8		$	322.5		$	(388.3	)	$	—
Intercompany capital investment	$	(407.3	)	$	(625.6	)	$	(917.8	)	$	—		$	1,950.7		$	—
Intercompany return of capital	$	442.0		$	21.2		$	619.7		$	—		$	(1,082.9	)	$	—

Financing activities:
Intercompany notes borrowing	$	—		$	117.0		$	—		$	63.6		$	(180.6	)	$	—
Intercompany notes payments	$	—		$	—		$	(322.5	)	$	(65.8	)	$	388.3		$	—
Intercompany capital receipt	$	—		$	—		$	625.2		$	1,325.5		$	(1,950.7	)	$	—
Intercompany capital distribution	$	—		$	(442.0	)	$	(21.2	)	$	(619.7	)	$	1,082.9		$	—
Intercompany dividends paid	$	—		$	—		$	(48.3	)	$	(1,436.9	)	$	1,485.2		$	—

The table below summarizes these non-cash transactions.

	Nine Months Ended June 30, 2019
(In millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated Total

Operating activities:
Intercompany receivables	$	(140.9	)	$	—		$	—		$	—		$	140.9		$	—
Intercompany payables	$	—		$	—		$	—		$	140.9		$	(140.9	)	$	—

Investing activities:
Intercompany notes issued	$	—		$	(3,800.0	)	$	(4,666.4	)	$	(8,715.4	)	$	17,181.8		$	—
Intercompany notes proceeds	$	—		$	4,519.8		$	4,519.8		$	4,759.6		$	(13,799.2	)	$	—
Intercompany capital investment	$	(10,396.2	)	$	(5,895.5	)	$	(6,880.5	)	$	—		$	23,172.2		$	—
Intercompany return of capital	$	606.7		$	1,479.6		$	1,021.4		$	—		$	(3,107.7	)	$	—

Financing activities:
Intercompany notes borrowing	$	—		$	4,436.3		$	479.1		$	12,266.4		$	(17,181.8	)	$	—
Intercompany notes payments	$	—		$	—		$	(959.6	)	$	(12,839.6	)	$	13,799.2		$	—
Intercompany capital receipt	$	—		$	10,396.2		$	5,413.7		$	7,362.3		$	(23,172.2	)	$	—
Intercompany capital distribution	$	(563.0	)	$	(606.7	)	$	(457.5	)	$	(1,480.5	)	$	3,107.7		$	—
Intercompany dividends paid	$	—		$	—		$	(302.2	)	$	(1,419.6	)	$	1,721.8		$	—

Leases (Tables)

9 Months Ended

Jun. 30, 2020

Leases [Abstract]

Schedule of Components of Lease Costs

Components of Lease Costs

The following table presents certain information related to the lease costs for finance and operating leases (in millions):

	Three Months Ended			Nine Months Ended
	June 30, 2020			June 30, 2020
Operating lease costs	$	50.0		$	150.0
Variable and short-term lease costs		25.6			79.6
Sublease income		(1.5	)		(5.0	)
Finance lease cost:
Amortization of lease assets		2.5			8.0
Interest on lease liabilities		1.9			6.0
Total lease cost, net	$	78.5		$	238.6

Summary of Supplemental Balance Sheet Information Related to Leases

Supplemental Balance Sheet Information Related to Leases

The table below presents the lease-related assets and liabilities recorded on the balance sheet (in millions):

	Condensed Consolidated Balance Sheet Caption	June 30, 2020

Operating leases:
Operating lease right-of-use asset	Other assets	$	649.2

Current operating lease liabilities	Other current liabilities	$	169.0
Operating lease liabilities	Other long-term liabilities		535.5
Total operating lease liabilities		$	704.5

Finance leases:
Property, plant and equipment		$	145.6
Accumulated depreciation			(19.0	)
Property, plant and equipment, net		$	126.6

Current finance lease liabilities	Current portion of debt	$	9.3
Noncurrent finance lease liabilities	Long-term debt due after one year		268.5
Total finance lease liabilities		$	277.8

Summary of Lease Term and Discount Rate

Lease Term and Discount Rate

	June 30, 2020
Weighted average remaining lease term:
Operating leases	5.9 years
Finance leases	9.2 years

Weighted average discount rate:
Operating leases		2.7	%
Finance leases		4.0	%

Summary of Supplemental Cash Flow Information Related to Leases

Supplemental Cash Flow Information Related to Leases

The table below presents supplemental cash flow information related to leases (in millions):

	Nine Months Ended
	June 30, 2020

Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows related to operating leases	$	151.7
Operating cash flows related to finance leases	$	6.5
Financing cash flows related to finance leases	$	7.7

Summary of Maturity of Lease Liabilities

Maturity of Lease Liabilities

The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years to the operating lease liabilities and finance lease liabilities recorded on the balance sheet (in millions):

	June 30, 2020
	Operating Leases			Finance Leases			Total

Remaining fiscal 2020	$	50.3		$	4.3		$	54.6
Fiscal 2021		177.1			16.1			193.2
Fiscal 2022		140.3			15.2			155.5
Fiscal 2023		110.0			13.3			123.3
Fiscal 2024		87.8			12.1			99.9
Thereafter		203.5			300.9			504.4
Total lease payments		769.0			361.9			1,130.9
Less: Interest ⁽¹⁾		(64.5	)		(84.1	)		(148.6	)
Present value of future lease payments	$	704.5		$	277.8		$	982.3

⁽¹⁾

^{Calculated using the interest rate for each lease.}

Summary of Future Minimum Payments Under All Existing Non-cancelable Operating Leases

At September 30, 2019, future minimum payments under all existing non-cancelable operating leases for the succeeding five years and thereafter were as follows (in millions):

Fiscal 2020	$	214.3
Fiscal 2021		180.1
Fiscal 2022		136.3
Fiscal 2023		108.3
Fiscal 2024		85.3
Thereafter		206.1
Total	$	930.4

Equity and Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Jun. 30, 2020

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Loss, Net of Tax

The tables below summarize the changes in accumulated other comprehensive loss, net of tax, by component for the nine months ended June 30, 2020 and June 30, 2019 (in millions):

	Deferred (Loss) Income on Cash Flow Hedges			Defined Benefit Pension and Postretirement Plans			Foreign Currency Items			Total ⁽¹⁾
Balance at September 30, 2019	$	0.7		$	(698.0	)	$	(371.9	)	$	(1,069.2	)
Other comprehensive loss before reclassifications		(10.1	)		—			(265.2	)		(275.3	)
Amounts reclassified from accumulated other comprehensive loss		2.2			28.3			—			30.5
Net current period other comprehensive (loss) income		(7.9	)		28.3			(265.2	)		(244.8	)
Reclassification of stranded tax effects		—			(73.4	)		—			(73.4	)
Balance at June 30, 2020	$	(7.2	)	$	(743.1	)	$	(637.1	)	$	(1,387.4	)

⁽¹⁾ All amounts are net of tax and noncontrolling interests.

	Deferred Loss on Cash Flow Hedges			Defined Benefit Pension and Postretirement Plans			Foreign Currency Items			Total ⁽¹⁾
Balance at September 30, 2018	$	(0.2	)	$	(465.9	)	$	(229.2	)	$	(695.3	)
Other comprehensive loss before reclassifications		—			—			(13.7	)		(13.7	)
Amounts reclassified from accumulated other comprehensive loss		—			13.6			—			13.6
Net current period other comprehensive income (loss)		—			13.6			(13.7	)		(0.1	)
Balance at June 30, 2019	$	(0.2	)	$	(452.3	)	$	(242.9	)	$	(695.4	)

⁽¹⁾ All amounts are net of tax and noncontrolling interests.

Summary of Reclassification out of Accumulated Other Comprehensive Loss

The following table summarizes the reclassifications out of accumulated other comprehensive loss by component (in millions):

	Three Months Ended								Three Months Ended
	June 30, 2020								June 30, 2019
	Pretax			Tax		Net of Tax			Pretax			Tax		Net of Tax
Amortization of defined benefit pension and postretirement items: ⁽¹⁾
Actuarial losses ⁽²⁾	$	(11.4	)	$	2.6	$	(8.8	)	$	(5.9	)	$	1.5	$	(4.4	)
Prior service costs ⁽²⁾		(1.3	)		0.3		(1.0	)		(0.5	)		0.1		(0.4	)
Subtotal defined benefit plans		(12.7	)		2.9		(9.8	)		(6.4	)		1.6		(4.8	)

Derivative Instruments: ⁽¹⁾
Interest rate swap hedge loss ⁽³⁾		(1.4	)		0.3		(1.1	)		—			—		—

Total reclassifications for the period	$	(14.1	)	$	3.2	$	(10.9	)	$	(6.4	)	$	1.6	$	(4.8	)

⁽¹⁾ Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.

⁽²⁾ Included in the computation of net periodic pension cost. See “Note 5. Retirement Plans” for additional details.

⁽³⁾ These accumulated other comprehensive income components are included in Interest expense, net.

	Nine Months Ended								Nine Months Ended
	June 30, 2020								June 30, 2019
	Pretax			Tax		Net of Tax			Pretax			Tax		Net of Tax
Amortization of defined benefit pension and postretirement items: ⁽¹⁾
Actuarial losses ⁽²⁾	$	(34.5	)	$	8.7	$	(25.8	)	$	(16.6	)	$	4.3	$	(12.3	)
Prior service costs ⁽²⁾		(3.3	)		0.8		(2.5	)		(1.7	)		0.4		(1.3	)
Reclassification of stranded tax effects ⁽³⁾		—			73.4		73.4			—			—		—
Subtotal defined benefit plans		(37.8	)		82.9		45.1			(18.3	)		4.7		(13.6	)

Derivative Instruments: ⁽¹⁾
Interest rate swap hedge loss ⁽⁴⁾		(0.4	)		0.1		(0.3	)		—			—		—
Natural gas commodity hedge loss ⁽⁵⁾		(2.6	)		0.7		(1.9	)		—			—		—
Subtotal cash flow hedges		(3.0	)		0.8		(2.2	)		—			—		—

Total reclassifications for the period	$	(40.8	)	$	83.7	$	42.9		$	(18.3	)	$	4.7	$	(13.6	)

⁽¹⁾ Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.

⁽²⁾ Included in the computation of net periodic pension cost. See “Note 5. Retirement Plans” for additional details.

⁽³⁾ Amount reclassified to retained earnings as a result of the adoption of ASU 2018-02.

⁽⁴⁾ These accumulated other comprehensive income components are included in Interest expense, net.

⁽⁵⁾ These accumulated other comprehensive income components are included in Cost of goods sold.

Earnings Per Share (Tables)

9 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of basic and diluted earnings per share under the two-class method (in millions, except per share data):

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
Numerator:
Net income attributable to common stockholders	$	178.5	$	252.6	$	465.1		$	552.1
Less: Distributed and undistributed income available to participating securities		—		—		(0.1	)		—
Distributed and undistributed income available to common stockholders	$	178.5	$	252.6	$	465.0		$	552.1

Denominator:
Basic weighted average shares outstanding		259.4		257.3		258.9			256.2
Effect of dilutive stock options and non- participating securities		1.0		1.3		1.3			2.9
Diluted weighted average shares outstanding		260.4		258.6		260.2			259.1

Basic earnings per share attributable to common stockholders	$	0.69	$	0.98	$	1.80		$	2.15
Diluted earnings per share attributable to common stockholders	$	0.69	$	0.98	$	1.79		$	2.13

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	Oct. 01, 2019 USD ($)
ASU 2018-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of stranded tax effects from accumulated other comprehensive income to retained earnings	$ 73.4

Revenue Recognition - Schedule of Disaggregates Revenue by Geographical Market and Product Type (Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 4,236.3	$ 4,690.0	$ 13,107.3	$ 13,637.4
Corrugated Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	2,728.8	3,072.8	8,520.8	8,797.3
Consumer Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,552.6	1,650.1	4,705.8	4,937.2
Land and Development [Member]
Disaggregation Of Revenue [Line Items]
Net sales		8.6	18.9	23.3
Intersegment Sales [Member]
Disaggregation Of Revenue [Line Items]
Net sales	(45.1)	(41.5)	(138.2)	(120.4)
Intersegment Sales [Member] \| Corrugated Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	(15.3)	(19.7)	(54.3)	(57.1)
Intersegment Sales [Member] \| Consumer Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	(29.8)	(21.8)	(83.9)	(63.3)
North America [Member]
Disaggregation Of Revenue [Line Items]
Net sales	3,826.0	4,227.9	11,787.0	12,201.3
North America [Member] \| Corrugated Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	2,632.4	2,954.6	8,187.0	8,426.3
North America [Member] \| Consumer Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,238.4	1,306.0	3,718.8	3,870.7
North America [Member] \| Land and Development [Member]
Disaggregation Of Revenue [Line Items]
Net sales		8.6	18.9	23.3
North America [Member] \| Intersegment Sales [Member]
Disaggregation Of Revenue [Line Items]
Net sales	(44.8)	(41.3)	(137.7)	(119.0)
South America [Member]
Disaggregation Of Revenue [Line Items]
Net sales	101.9	117.6	349.0	373.4
South America [Member] \| Corrugated Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	87.8	102.8	296.1	321.2
South America [Member] \| Consumer Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	14.1	14.8	52.9	52.2
Europe [Member]
Disaggregation Of Revenue [Line Items]
Net sales	234.2	259.9	736.5	790.0
Europe [Member] \| Corrugated Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	0.6	0.7	4.9	0.7
Europe [Member] \| Consumer Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	233.8	259.3	731.8	789.4
Europe [Member] \| Intersegment Sales [Member]
Disaggregation Of Revenue [Line Items]
Net sales	(0.2)	(0.1)	(0.2)	(0.1)
Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	74.2	84.6	234.8	272.7
Asia Pacific [Member] \| Corrugated Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	8.0	14.7	32.8	49.1
Asia Pacific [Member] \| Consumer Packaging [Member]
Disaggregation Of Revenue [Line Items]
Net sales	66.3	70.0	202.3	224.9
Asia Pacific [Member] \| Intersegment Sales [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ (0.1)	$ (0.1)	$ (0.3)	$ (1.3)

Revenue Recognition - Summary of Opening and Closing Balances of Contract Assets and Contract Liabilities (Details) $ in Millions	9 Months Ended
	Jun. 30, 2020 USD ($)
Disaggregation Of Revenue [Abstract]
Short-Term Contract Assets, Beginning balance	$ 188.0
Increase / (Decrease) in Short-Term Contract Assets	14.0
Short-Term Contract Assets, Ending balance	202.0
Short-Term Contract Liabilities, Beginning balance	7.7
Increase / (Decrease) in Short-Term Contract Liabilities	9.2
Short-Term Contract Liabilities, Ending balance	$ 16.9

Acquisitions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Nov. 02, 2018	Jun. 30, 2020	Sep. 30, 2019	Jul. 01, 2015
Business Acquisition [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Number of WRKCo Shares to WestRock Shares	1
WRKCo Inc. [Member]
Business Acquisition [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.01
KapStone Acquisition [Member]
Business Acquisition [Line Items]
Common Stock, Par or Stated Value Per Share	0.0001
Business Acquisition, Share Price	$ 35.00
Ratio of KapStone Shares to WestRock Shares	49.81%
Maximum percentage of issued and outstanding KapStone Shares to elect WestRock stock consideration	25.00%
Estimated Enterprise Value of Acquisition	$ 4,900.0
Consideration paid in cash	$ 3,300.0
Business acquisition, number of shares issued	1,600,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 70.1
Business acquisition, percentage of equity interest on shares issued and outstanding	0.60%
Fair value of share-based awards issued in business combinations	$ 70.8
KapStone Acquisition [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Useful Life	1 year
KapStone Acquisition [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Useful Life	20 years

Acquisitions - Summary of Fair Values of Assets Acquired and Liabilities Assumed by Major Class of Assets and Liabilities and Measurement Period Adjustments (Details) - USD ($)
$ in Millions

Jun. 30, 2020

Sep. 30, 2019

Jun. 30, 2019

Nov. 02, 2018

$ 7,270.5

$ 7,285.6

KapStone Acquisition [Member]

$ 2,450.4

Cash and cash equivalents

$ 8.6

Current assets, excluding cash and cash equivalents

878.9

1,910.3

Long-term debt due after one year

1,755.0

Intangible assets

1,336.1

Other long-term assets

27.9

Total assets acquired

5,916.8

Current portion of debt

33.3

Current liabilities

337.5

1,333.4

Accrued pension and other long-term benefits

9.8

609.7

118.4

KapStone Acquisition [Member] | Measurement Period Adjustments [Member]

2,442.1

Net assets acquired

3,474.7

Current assets, excluding cash and cash equivalents

^[1]

(30.2)

^[1]

11.5

Accrued pension and other long-term benefits

^[1]

0.5

Intangible assets

^[1]

30.3

Other long-term assets

^[1]

(0.1)

Total assets acquired

^[1]

12.0

Current liabilities

^[1]

7.9

^[1]

2.8

^[1]

(1.4)

^[1]

2.7

KapStone Acquisition [Member] | As Adjusted [Member]

^[1]

12.0

Cash and cash equivalents

^[2]

8.6

Current assets, excluding cash and cash equivalents

^[2]

848.7

^[2]

1,921.8

Long-term debt due after one year

^[2]

1,755.5

Intangible assets

^[2]

1,366.4

Other long-term assets

^[2]

27.8

Total assets acquired

^[2]

5,928.8

Current portion of debt

^[2]

33.3

Current liabilities

^[2]

345.4

^[2]

1,333.4

Accrued pension and other long-term benefits

^[2]

12.6

^[2]

608.3

^[2]

121.1

Maturity Of Lease Liabilities [Abstract]

^[2]

2,454.1

Net assets acquired

^[2]

$ 3,474.7

[1]	^{The measurement period adjustments recorded in fiscal 2019 and fiscal 2020 did not have a significant impact on our condensed consolidated statements of income in any period.}
[2]	^{The measurement period adjustments were primarily due to refinements to third party appraisals and carrying amounts of certain assets and liabilities, as well as adjustments to certain tax accounts based on, among other things, adjustments to deferred tax liabilities. The net impact of the measurement period adjustments to goodwill were essentially flat.}

Acquisitions - Summary of Weighted Average Life and Fair Value of Intangible Asset Recognized in KapStone Acquisition, Excluding Goodwill (Details) - KapStone Acquisition [Member] $ in Millions	Nov. 02, 2018 USD ($)
Acquired Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	11 years 10 months 24 days
Gross Carrying Amount	$ 1,366.4
Customer Relationships [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	11 years 8 months 12 days
Gross Carrying Amount	$ 1,303.0
Trademarks and Tradenames [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	16 years 10 months 24 days
Gross Carrying Amount	$ 54.2
Favorable Contracts [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	6 years
Gross Carrying Amount	$ 9.2

Restructuring and Other Costs - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring And Related Activities [Abstract]
Restructuring and other costs	$ 9.7	$ 17.9	$ 56.2	$ 107.1

Restructuring and Other Costs - Schedule of Restructuring and Other Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring And Related Activities [Abstract]
Restructuring	$ 7.4	$ 6.4	$ 40.1	$ 56.4
Other	2.3	11.5	16.1	50.7
Restructuring and other costs	$ 9.7	$ 17.9	$ 56.2	$ 107.1

Restructuring and Other Costs - Schedule of Restructuring Charges Related to Active Restructuring Initiatives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 7.4	$ 6.4	$ 40.1	$ 56.4
Restructuring and Related Cost, Cost Incurred to Date	349.4		349.4
Restructuring and Related Cost, Expected Cost	352.7		352.7
Net Property, Plant and Equipment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	(0.3)	(1.7)	2.7	5.2
Restructuring and Related Cost, Cost Incurred to Date	128.2		128.2
Restructuring and Related Cost, Expected Cost	128.2		128.2
Severance and Other Employee Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	5.2	5.2	30.8	38.6
Restructuring and Related Cost, Cost Incurred to Date	155.8		155.8
Restructuring and Related Cost, Expected Cost	155.8		155.8
Equipment and Inventory Relocation Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.2	1.8	1.6	3.9
Restructuring and Related Cost, Cost Incurred to Date	15.8		15.8
Restructuring and Related Cost, Expected Cost	17.0		17.0
Facility Carrying Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.4	0.8	1.4	2.8
Restructuring and Related Cost, Cost Incurred to Date	21.8		21.8
Restructuring and Related Cost, Expected Cost	22.5		22.5
Other Costs Related to Restructuring and Other Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	1.9	0.3	3.6	5.9
Restructuring and Related Cost, Cost Incurred to Date	27.8		27.8
Restructuring and Related Cost, Expected Cost	29.2		29.2
Corporate, Non-Segment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.7	2.5	10.3	24.4
Restructuring and Related Cost, Cost Incurred to Date	56.0		56.0
Restructuring and Related Cost, Expected Cost	56.0		56.0
Corporate, Non-Segment [Member] \| Severance and Other Employee Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.1	2.4	9.0	22.2
Restructuring and Related Cost, Cost Incurred to Date	47.3		47.3
Restructuring and Related Cost, Expected Cost	47.3		47.3
Corporate, Non-Segment [Member] \| Other Costs Related to Restructuring and Other Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.6	0.1	1.3	2.2
Restructuring and Related Cost, Cost Incurred to Date	8.7		8.7
Restructuring and Related Cost, Expected Cost	8.7		8.7
Corrugated Packaging [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	3.6	1.8	12.4	23.3
Restructuring and Related Cost, Cost Incurred to Date	173.0		173.0
Restructuring and Related Cost, Expected Cost	174.6		174.6
Corrugated Packaging [Member] \| Net Property, Plant and Equipment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	(0.3)	(1.9)	2.2	5.2
Restructuring and Related Cost, Cost Incurred to Date	96.3		96.3
Restructuring and Related Cost, Expected Cost	96.3		96.3
Corrugated Packaging [Member] \| Severance and Other Employee Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	3.2	1.6	6.8	12.3
Restructuring and Related Cost, Cost Incurred to Date	41.3		41.3
Restructuring and Related Cost, Expected Cost	41.3		41.3
Corrugated Packaging [Member] \| Equipment and Inventory Relocation Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.2	1.6	1.5	3.0
Restructuring and Related Cost, Cost Incurred to Date	9.8		9.8
Restructuring and Related Cost, Expected Cost	10.5		10.5
Corrugated Packaging [Member] \| Facility Carrying Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.4	0.6	1.4	2.6
Restructuring and Related Cost, Cost Incurred to Date	19.9		19.9
Restructuring and Related Cost, Expected Cost	20.6		20.6
Corrugated Packaging [Member] \| Other Costs Related to Restructuring and Other Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.1	(0.1)	0.5	0.2
Restructuring and Related Cost, Cost Incurred to Date	5.7		5.7
Restructuring and Related Cost, Expected Cost	5.9		5.9
Consumer Packaging [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	3.1	2.1	17.4	8.6
Restructuring and Related Cost, Cost Incurred to Date	101.8		101.8
Restructuring and Related Cost, Expected Cost	103.5		103.5
Consumer Packaging [Member] \| Net Property, Plant and Equipment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		0.2	0.5
Restructuring and Related Cost, Cost Incurred to Date	30.1		30.1
Restructuring and Related Cost, Expected Cost	30.1		30.1
Consumer Packaging [Member] \| Severance and Other Employee Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	1.9	1.2	15.0	4.0
Restructuring and Related Cost, Cost Incurred to Date	53.4		53.4
Restructuring and Related Cost, Expected Cost	53.4		53.4
Consumer Packaging [Member] \| Equipment and Inventory Relocation Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		0.2	0.1	0.9
Restructuring and Related Cost, Cost Incurred to Date	6.0		6.0
Restructuring and Related Cost, Expected Cost	6.5		6.5
Consumer Packaging [Member] \| Facility Carrying Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		0.2		0.2
Restructuring and Related Cost, Cost Incurred to Date	1.9		1.9
Restructuring and Related Cost, Expected Cost	1.9		1.9
Consumer Packaging [Member] \| Other Costs Related to Restructuring and Other Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	1.2	$ 0.3	1.8	3.5
Restructuring and Related Cost, Cost Incurred to Date	10.4		10.4
Restructuring and Related Cost, Expected Cost	11.6		11.6
Land and Development [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost				0.1
Restructuring and Related Cost, Cost Incurred to Date	18.6		18.6
Restructuring and Related Cost, Expected Cost	18.6		18.6
Land and Development [Member] \| Net Property, Plant and Equipment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	1.8		1.8
Restructuring and Related Cost, Expected Cost	1.8		1.8
Land and Development [Member] \| Severance and Other Employee Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost				$ 0.1
Restructuring and Related Cost, Cost Incurred to Date	13.8		13.8
Restructuring and Related Cost, Expected Cost	13.8		13.8
Land and Development [Member] \| Other Costs Related to Restructuring and Other Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	3.0		3.0
Restructuring and Related Cost, Expected Cost	$ 3.0		$ 3.0

Restructuring and Other Costs - Schedule of Acquisition, Divestiture and Integration Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]
Acquisition costs			$ 0.2	$ 27.9
Integration costs			15.9	22.6
Divestiture costs				0.2
Other total	$ 2.3	$ 11.5	16.1	50.7
Other Segments [Member]
Restructuring Cost And Reserve [Line Items]
Acquisition costs	(0.2)	0.9	0.2	27.9
Integration costs	2.5	10.6	15.9	22.6
Divestiture costs				0.2
Other total	$ 2.3	$ 11.5	$ 16.1	$ 50.7

Restructuring and Other Costs - Schedule of Changes in Restructuring Accrual Charges (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Restructuring And Other Costs [Abstract]
Accrual at beginning of fiscal year	$ 32.3	$ 31.6
Additional accruals	31.7	37.5
Payments	(35.3)	(32.9)
Adjustment to accruals	(1.1)	(3.1)
Foreign currency rate changes		0.1
Accrual at June 30	$ 27.6	$ 33.2

Restructuring and Other Costs - Schedule of Reconciliation of Accruals and Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring And Other Costs [Abstract]
Additional accruals and adjustments to accruals (see table above)			$ 30.6	$ 34.4
Acquisition costs			0.2	27.9
Integration costs			15.9	22.6
Divestiture costs				0.2
Net property, plant and equipment costs			2.7	5.2
Severance and other employee costs			(0.1)	6.9
Equipment and inventory relocation costs			1.6	3.9
Facility carrying costs			1.4	2.8
Other costs			3.9	3.2
Restructuring and other costs	$ 9.7	$ 17.9	$ 56.2	$ 107.1

Retirement Plans - Additional Information (Details) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2019 USD ($) Letter	Sep. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Feb. 29, 2020 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer Plans, Withdrawal Obligation		$ 237.2	$ 237.7		$ 237.7
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions by employer to pension and supplemental retirement plans			4.6	$ 6.6	17.2	$ 16.1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions by employer to pension and supplemental retirement plans			$ 1.6	$ 2.2	$ 5.3	$ 6.6
Pace Industry Union Management Pension Fund [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer Plans, Withdrawal Obligation	$ 2.3	170.3
Withdrawal obligation, per month		$ 0.7
Periods of Payments Used to Calculate Withdrawal Liability in Connection with PIUMPF Withdrawal	20 years	20 years
Number of additional demand letters \| Letter	2
Withdrawal obligation accumulated funding deficiency	$ 2.0						$ 51.2

Retirement Plans - Summary of Components of Net Pension Income and Summary of Components of Postretirement Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Multiemployer pension withdrawal income	$ (2.0)	$ (1.7)	$ (1.1)	$ (1.7)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	11.9	10.2	39.2	32.5
Interest cost	49.7	58.8	149.1	174.0
Expected return on plan assets	(90.1)	(85.9)	(271.7)	(254.7)
Amortization of net actuarial loss (gain)	11.4	6.3	35.1	18.7
Amortization of prior service cost (credit)	1.9	1.3	5.4	3.9
Curtailment loss		0.1	0.4	1.0
Company defined benefit plan income	(15.2)	(9.2)	(42.5)	(24.6)
Multiemployer pension withdrawal income	(2.0)	(1.7)	(1.1)	(1.7)
Multiemployer and other plans	0.3	0.2	1.0	0.5
Net pension (income) cost	(16.9)	(10.7)	(42.6)	(25.8)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.3	0.2	1.0	0.8
Interest cost	1.7	1.9	5.3	5.8
Amortization of net actuarial loss (gain)	0.5	(0.7)	0.1	(1.5)
Amortization of prior service cost (credit)	(0.7)	(0.7)	(2.1)	(2.1)
Net pension (income) cost	$ 1.8	$ 0.7	$ 4.3	$ 3.0

Income Taxes - Additional Information (Details)	3 Months Ended		9 Months Ended
Income Taxes - Additional Information (Details)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Effective tax rates	9.60%	23.40%	20.90%	25.20%

Segment Information - Additional Information (Details) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment				3
Insurance proceeds received, net cash used for investing activities				$ 2.4	$ 16.5
Corrugated Packaging [Member] \| Hurricane Michael [Member]
Segment Reporting Information [Line Items]
Insurance proceeds received		$ 32.3
Deferred insurance proceeds		2.8
Deferred insurance proceeds recognized in cost of goods sold						$ 2.8
Insurance proceeds from business interruption recoveries		11.7			45.0
Insurance proceeds for direct costs and property damage		20.6			65.0
Insurance proceeds received, net cash provided by operating activities				30.9	93.5
Insurance proceeds received, net cash used for investing activities				$ 1.4	16.5
Corrugated Packaging [Member] \| Hurricane Michael [Member] \| Cost of Goods Sold [Member]
Segment Reporting Information [Line Items]
Insurance proceeds received			$ 30.0		$ 110.0
Reduction of cost of goods sold		$ 29.5
Consumer Packaging [Member] \| Cost of Goods Sold [Member]
Segment Reporting Information [Line Items]
Reduction of cost of goods sold	$ 1.0

Segment Information - Certain Operating Data for Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Net sales	$ 4,236.3	$ 4,690.0	$ 13,107.3	$ 13,637.4
(Loss) gain on sale of certain closed facilities		(2.7)	5.5	47.8
Multiemployer pension withdrawal income	2.0	1.7	1.1	1.7
Land and Development impairments				(13.0)
Restructuring and other costs	(9.7)	(17.9)	(56.2)	(107.1)
Interest expense, net	(92.4)	(111.1)	(283.2)	(317.3)
Loss on extinguishment of debt	(0.6)	(3.2)	(1.1)	(4.7)
Other (expense) income, net	(5.0)	3.7	(9.6)	(2.3)
Income before income taxes	199.2	331.4	591.9	743.0
Depreciation, depletion and amortization	365.7	385.3	1,121.4	1,128.1
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	4,281.4	4,731.5	13,245.5	13,757.8
Segment income	323.2	485.3	989.5	1,205.7
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(45.1)	(41.5)	(138.2)	(120.4)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Non-allocated expenses	(18.3)	(24.4)	(54.1)	(67.8)
Interest expense, net	(92.4)	(111.1)	(283.2)	(317.3)
Corrugated Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	2,728.8	3,072.8	8,520.8	8,797.3
Depreciation, depletion and amortization	233.1	241.4	717.0	702.6
Corrugated Packaging [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	2,728.8	3,072.8	8,520.8	8,797.3
Segment income	227.9	392.7	755.8	949.8
Corrugated Packaging [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(15.3)	(19.7)	(54.3)	(57.1)
Corrugated Packaging [Member] \| Unaffiliated Customers [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	2,713.5	3,053.1	8,466.5	8,740.2
Consumer Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	1,552.6	1,650.1	4,705.8	4,937.2
Depreciation, depletion and amortization	131.2	140.7	399.7	418.5
Consumer Packaging [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,552.6	1,650.1	4,705.8	4,937.2
Segment income	95.3	91.0	232.3	253.1
Consumer Packaging [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(29.8)	(21.8)	(83.9)	(63.3)
Consumer Packaging [Member] \| Unaffiliated Customers [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,522.8	1,628.3	4,621.9	4,873.9
Land and Development [Member]
Segment Reporting Information [Line Items]
Net sales		8.6	18.9	23.3
Land and Development [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		8.6	18.9	23.3
Segment income		1.6	1.4	2.8
Land and Development [Member] \| Unaffiliated Customers [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		8.6	18.9	23.3
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	$ 1.4	$ 3.2	$ 4.7	$ 7.0

Inventories - Schedule of Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019
Inventories [Abstract]
Finished goods and work in process	$ 937.1	$ 938.9
Raw materials	788.0	818.8
Spare parts and supplies	513.8	479.7
Inventories at FIFO cost	2,238.9	2,237.4
LIFO reserve	(101.2)	(129.9)
Net inventories	$ 2,137.7	$ 2,107.5

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019
Property, plant and equipment at cost:
Property, plant and equipment, at cost	$ 17,797.2	$ 17,461.3
Less: accumulated depreciation, depletion and amortization	(6,874.6)	(6,271.8)
Property, plant and equipment, net	10,922.6	11,189.5
Land and Buildings [Member]
Property, plant and equipment at cost:
Property, plant and equipment, at cost	2,507.3	2,442.3
Machinery and Equipment [Member]
Property, plant and equipment at cost:
Property, plant and equipment, at cost	15,044.2	14,743.6
Forestlands and Mineral Rights [Member]
Property, plant and equipment at cost:
Property, plant and equipment, at cost	114.1	144.0
Transportation Equipment [Member]
Property, plant and equipment at cost:
Property, plant and equipment, at cost	28.8	31.2
Leasehold Improvements [Member]
Property, plant and equipment at cost:
Property, plant and equipment, at cost	$ 102.8	$ 100.2

Fair Value - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 19, 2019
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Land and Development impairments			$ 13.0
Maximum eligible receivables that may be sold				$ 650.0
Minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Estimated loss on sale of accounts receivable by quarter		$ 2.0
Maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Estimated loss on sale of accounts receivable by quarter		$ 4.0
Mineral Rights [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Land and Development impairments	$ 13.0

Fair Value - Summary of Activity Under A/R Sales Agreement (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Receivables sold to the financial institution and derecognized	$ 1,847.8	$ 1,453.5
Receivables collected by financial institution	(1,844.7)	(1,441.6)
Cash paid to financial institution	$ (3.1)	$ (11.9)

Debt - Schedule of Carrying Value of Individual Components of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019
Debt Instrument [Line Items]
Total debt	$ 10,053.4	$ 10,063.4
Less: current portion of debt	213.1	561.1
Long-term debt due after one year	9,840.3	9,502.3
Notes Due Fiscal 2020 to 2022 [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	399.2	507.8
Notes Due Fiscal 2023 to 2028 [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	3,772.4	3,769.1
Notes Due Fiscal 2029 to 2033 [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	2,781.9	2,197.6
Notes Due Fiscal 2037 to 2047 [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	178.7	179.0
Term Loan Facilities [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	1,797.1	2,295.5
Revolving Credit and Swing Facilities [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	285.0	396.0
Commercial Paper [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	329.9	339.2
Finance Lease Obligations [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Total debt	277.8	185.8
Supplier Financing and Commercial Card Programs [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Total debt	101.0	123.2
International and Other Debt [Member]
Debt Instrument [Line Items]
Total debt	$ 130.4	$ 70.2

Debt - Additional Information (Details)										1 Months Ended	12 Months Ended
Debt - Additional Information (Details)	Jun. 30, 2020 USD ($)	Jun. 16, 2020 USD ($)	Jun. 01, 2020 USD ($)	Feb. 27, 2020 USD ($)	Nov. 21, 2019 USD ($)	May 02, 2019 USD ($)	Dec. 07, 2018 USD ($)	Apr. 27, 2018 EUR (€)	Mar. 07, 2018 USD ($)	Oct. 31, 2017 USD ($)	Sep. 30, 2019 USD ($)	Nov. 20, 2019 USD ($)	Oct. 01, 2019 USD ($) Mill
Debt Instrument [Line Items]
Fair value of debt	$ 10,800,000,000										$ 10,600,000,000
DDTL Credit Agreement [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity									$ 3,800,000,000
Senior Notes due June 2033 [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount			$ 600,000,000.0
Debt instrument, interest rate			3.00%
Debt instrument, effective interest rate	3.10%
Debt instrument, maturity year			2033
Debt instrument, discount			$ 1,400,000
Debt instrument, transaction closing date			Jun. 03, 2020
Debt instrument, issuance costs			$ 5,100,000
Notes due June 2020 [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	9.75%
Prepayment of outstanding principal amount			$ 100,000,000.0
Revolving Credit Facility [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity	$ 2,300,000,000				$ 2,300,000,000							$ 2,000,000,000.0
Credit facility, maturity date					Nov. 21, 2024
Long-term debt	0										0
Revolving Credit Facility [Member] \| Unsecured Debt [Member] \| Non-U.S. Dollar Currencies [Member]
Debt Instrument [Line Items]
Capacity available for special purpose					$ 500,000,000							$ 400,000,000
Revolving Credit Facility [Member] \| Unsecured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, maximum permitted debt to capitalization ratio					0.65							0.60
Revolving Credit Facility [Member] \| Future Mexican Peso Sub-Facility [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity					$ 200,000,000
Wells Fargo Bank, NA Credit Facility [Member] \| Terminated Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity					$ 450,000,000.0
Five Year Term Loan \| DDTL Credit Agreement [Member]
Debt Instrument [Line Items]
Prepayment of outstanding principal amount		$ 300,000,000.0		$ 200,000,000.0
Credit Facility, maximum borrowing capacity									$ 1,750,000,000
Long-term debt	$ 898,400,000										$ 1,396,900,000
Debt instrument, maturity period	5 years	5 years		5 years					5 years		5 years
364-Day Term Loan [Member] \| DDTL Credit Agreement [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity									$ 300,000,000.0
Long-term debt											$ 0
Debt instrument, maturity period									364 days		364 days
Three Year Term Loan [Member] \| DDTL Credit Agreement [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity									$ 1,750,000,000
Long-term debt											$ 0
Debt instrument, maturity period									3 years		3 years
Receivables Securitization Facility [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 0										$ 0
Receivables backed financing, maximum borrowing amount						$ 700,000,000.0
Debt instrument, maturity date						Jul. 22, 2019
Debt instrument, maximum borrowing capacity, amount	700,000,000.0										592,100,000
Loans and Leases Receivable, Collateral for Secured Borrowings	1,134,000,000.0										959,300,000
Debt instrument, amended maturity date						May 02, 2022
Cooperatieve Rabobank U.A., New York Branch European Revolving Credit Facility [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Credit Facility, maximum borrowing capacity \| €								€ 500,000,000.0
Credit facility, maturity date					Nov. 21, 2022			Apr. 27, 2021
Long-term debt	285,000,000.0										350,000,000.0
Debt instrument, maturity period								3 years
Incremental line of credit \| €								€ 100,000,000.0
Line of credit facility, maximum Euro denominated borrowing capacity \| €								€ 500,000,000.0
Current portion of long-term debt	0										175,000,000.0
Cooperatieve Rabobank U.A., New York Branch European Revolving Credit Facility [Member] \| Unsecured Debt [Member] \| Foreign Exchange Contract [Member]
Debt Instrument [Line Items]
Amount of foreign exchange contracts	285,200,000
Commercial Paper [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	250,000,000.0										250,000,000.0
Aggregate Principal Amount of Short-term Unsecured Commercial Paper Program, Maximum							$ 1,000,000,000.0			$ 1,000,000,000.0
Debt Instrument, notice period for termination							30 days			30 days
Borrowings outstanding	$ 329,900,000										$ 339,200,000
Debt, weighted average interest rate	0.34%										2.39%
Commercial Paper [Member] \| Unsecured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, maturity period							397 days			397 days
Chip Mills [Member]
Debt Instrument [Line Items]
Number of mills recharacterized short-term and long-term liability \| Mill													2
Finance lease obligation reclassified from short term and long term liability													$ 100,300,000

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors - Condensed Consolidating Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Condensed Income Statements Captions [Line Items]
Net sales	$ 4,236.3	$ 4,690.0	$ 13,107.3	$ 13,637.4
Cost of goods sold	3,466.3	3,701.1	10,723.5	10,967.1
Gross profit	770.0	988.9	2,383.8	2,670.3
Selling, general and administrative, excluding intangible amortization	390.1	442.4	1,234.4	1,287.4
Selling, general and administrative intangible amortization	99.6	102.4	301.5	297.7
(Gain) loss on disposal of assets	1.0	6.5	(5.9)	(37.3)
Multiemployer pension withdrawal income	(2.0)	(1.7)	(1.1)	(1.7)
Land and Development impairments				13.0
Restructuring and other costs	9.7	17.9	56.2	107.1
Operating profit	271.6	421.4	798.7	1,004.1
Interest (expense) income, net	(92.4)	(111.1)	(283.2)	(317.3)
Loss on extinguishment of debt	(0.6)	(3.2)	(1.1)	(4.7)
Pension and other postretirement non-service (expense) income	25.6	18.9	78.4	54.9
Other income (expense), net	(5.0)	3.7	(9.6)	(2.3)
Equity in income of unconsolidated entities		1.7	8.7	8.3
Income before income taxes	199.2	331.4	591.9	743.0
Income tax benefit (expense)	(19.2)	(77.6)	(123.5)	(187.5)
Consolidated net income	180.0	253.8	468.4	555.5
Less: Net income attributable to noncontrolling interests	(1.5)	(1.2)	(3.3)	(3.4)
Net income attributable to common stockholders	178.5	252.6	465.1	552.1
Comprehensive income (loss) attributable to common stockholders	210.1	282.7	220.3	552.0
Parent [Member]
Condensed Income Statements Captions [Line Items]
Other income (expense), net			0.1
Equity in income (loss) of consolidated entities	178.5	252.6	465.0	552.1
Income before income taxes	178.5	252.6	465.1	552.1
Consolidated net income	178.5	252.6	465.1	552.1
Net income attributable to common stockholders	178.5	252.6	465.1	552.1
Comprehensive income (loss) attributable to common stockholders	210.1	282.7	220.3	552.0
Issuer [Member]
Condensed Income Statements Captions [Line Items]
Selling, general and administrative, excluding intangible amortization	0.4	(0.4)	0.7
Restructuring and other costs		1.4	3.6	5.3
Operating profit	(0.4)	(1.0)	(4.3)	(5.3)
Interest (expense) income, net	(60.6)	(66.5)	(189.1)	(178.5)
Intercompany interest income (expense), net	(1.5)	(2.5)	(8.3)	1.0
Loss on extinguishment of debt	(0.6)	(0.8)	(1.0)	(2.6)
Other income (expense), net	0.5		0.5	(4.0)
Equity in income (loss) of consolidated entities	272.7	276.9	751.6	671.1
Income before income taxes	210.1	206.1	549.4	481.7
Income tax benefit (expense)	15.6	17.9	50.4	46.9
Consolidated net income	225.7	224.0	599.8	528.6
Net income attributable to common stockholders	225.7	224.0	599.8	528.6
Comprehensive income (loss) attributable to common stockholders	257.2	253.7	355.9	530.6
Guarantor Subsidiaries [Member]
Condensed Income Statements Captions [Line Items]
Net sales	604.9	643.0	1,825.1	1,906.0
Cost of goods sold	485.3	475.6	1,469.1	1,503.3
Gross profit	119.6	167.4	356.0	402.7
Selling, general and administrative, excluding intangible amortization	18.6	26.0	75.3	53.3
Selling, general and administrative intangible amortization	24.5	26.1	75.0	78.4
(Gain) loss on disposal of assets	(0.1)	0.1	(0.1)	0.1
Multiemployer pension withdrawal income	(2.0)		(1.9)
Restructuring and other costs		0.1		0.2
Operating profit	78.6	115.1	207.7	270.7
Interest (expense) income, net	(33.5)	(36.9)	(102.3)	(128.8)
Intercompany interest income (expense), net	(17.8)	(33.3)	(67.2)	(87.9)
Loss on extinguishment of debt		(2.3)		(1.9)
Pension and other postretirement non-service (expense) income	(1.4)	(1.4)	(5.2)	(4.8)
Other income (expense), net		(35.2)	1.3	(35.6)
Equity in income (loss) of consolidated entities	195.8	(11.4)	445.2	403.0
Income before income taxes	221.7	(5.4)	479.5	414.7
Income tax benefit (expense)	(0.6)	(1.9)	(2.3)	(3.2)
Consolidated net income	221.1	(7.3)	477.2	411.5
Net income attributable to common stockholders	221.1	(7.3)	477.2	411.5
Comprehensive income (loss) attributable to common stockholders	250.2	20.7	238.6	415.9
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements Captions [Line Items]
Net sales	4,293.6	4,676.3	13,233.2	13,648.2
Cost of goods sold	3,635.4	3,844.9	11,181.4	11,370.7
Gross profit	658.2	831.4	2,051.8	2,277.5
Selling, general and administrative, excluding intangible amortization	371.1	416.8	1,158.4	1,234.1
Selling, general and administrative intangible amortization	75.1	76.3	226.5	219.3
(Gain) loss on disposal of assets	1.1	6.4	(5.8)	(37.4)
Multiemployer pension withdrawal income		(1.7)	0.8	(1.7)
Land and Development impairments				13.0
Restructuring and other costs	9.7	16.4	52.6	101.6
Operating profit	201.2	317.2	619.3	748.6
Interest (expense) income, net	1.7	(7.7)	8.2	(10.0)
Intercompany interest income (expense), net	11.5	25.9	51.5	77.0
Loss on extinguishment of debt		(0.1)	(0.1)	(0.2)
Pension and other postretirement non-service (expense) income	27.0	20.3	83.6	59.7
Other income (expense), net	(5.5)	38.9	(11.5)	37.3
Equity in income of unconsolidated entities		1.7	8.7	8.3
Income before income taxes	235.9	396.2	759.7	920.7
Income tax benefit (expense)	(34.2)	(93.6)	(171.6)	(231.2)
Consolidated net income	201.7	302.6	588.1	689.5
Less: Net income attributable to noncontrolling interests	(1.5)	(1.2)	(3.3)	(3.4)
Net income attributable to common stockholders	200.2	301.4	584.8	686.1
Comprehensive income (loss) attributable to common stockholders	231.3	331.8	347.4	687.0
Eliminations [Member]
Condensed Income Statements Captions [Line Items]
Net sales	(662.2)	(629.3)	(1,951.0)	(1,916.8)
Cost of goods sold	(654.4)	(619.4)	(1,927.0)	(1,906.9)
Gross profit	(7.8)	(9.9)	(24.0)	(9.9)
Operating profit	(7.8)	(9.9)	(24.0)	(9.9)
Intercompany interest income (expense), net	7.8	9.9	24.0	9.9
Equity in income (loss) of consolidated entities	(647.0)	(518.1)	(1,661.8)	(1,626.2)
Income before income taxes	(647.0)	(518.1)	(1,661.8)	(1,626.2)
Consolidated net income	(647.0)	(518.1)	(1,661.8)	(1,626.2)
Net income attributable to common stockholders	(647.0)	(518.1)	(1,661.8)	(1,626.2)
Comprehensive income (loss) attributable to common stockholders	$ (738.7)	$ (606.2)	$ (941.9)	$ (1,633.5)

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Current Assets:
Cash and cash equivalents	$ 291.5	$ 151.6
Accounts receivable	2,083.2	2,193.2
Inventories	2,137.7	2,107.5
Other current assets	490.2	496.2
Assets held for sale	3.3	25.8
Total current assets	5,005.9	4,974.3
Property, plant and equipment, net	10,922.6	11,189.5
Goodwill	7,270.5	7,285.6
Intangibles, net	3,749.4	4,059.5
Restricted assets held by special purpose entities	1,269.2	1,274.3
Prepaid pension asset	305.9	224.7
Other assets	1,754.1	1,148.8
Total Assets	30,277.6	30,156.7
Current liabilities:
Current portion of debt	213.1	561.1
Accounts payable	1,513.5	1,831.8
Accrued compensation and benefits	377.2	470.4
Other current liabilities	683.1	571.8
Total current liabilities	2,786.9	3,435.1
Long-term debt due after one year	9,840.3	9,502.3
Pension liabilities, net of current portion	271.3	294.0
Postretirement benefit liabilities, net of current portion	151.9	162.1
Non-recourse liabilities held by special purpose entities	1,138.7	1,145.2
Deferred income taxes	2,888.2	2,878.0
Other long-term liabilities	1,468.8	1,053.9
Redeemable noncontrolling interests	1.6	1.9
Total stockholders’ equity	11,713.1	11,669.9	$ 11,827.7
Noncontrolling interests	16.8	14.3
Total equity	11,729.9	11,684.2	$ 11,841.3
Total Liabilities and Equity	30,277.6	30,156.7
Parent [Member]
Current Assets:
Other current assets	0.5
Total current assets	0.5
Investments in consolidated subsidiaries	12,158.9	11,973.6
Total Assets	12,159.4	11,973.6
Current liabilities:
Accrued compensation and benefits	0.2	0.3
Intercompany payables	446.1	303.4
Total current liabilities	446.3	303.7
Total stockholders’ equity	11,713.1	11,669.9
Total equity	11,713.1	11,669.9
Total Liabilities and Equity	12,159.4	11,973.6
Issuer [Member]
Current Assets:
Other current assets		1.2
Intercompany receivables	24.0	227.7
Total current assets	24.0	228.9
Intercompany notes receivable	154.9	155.0
Investments in consolidated subsidiaries	18,891.4	18,524.2
Other assets	91.4	67.8
Total Assets	19,161.7	18,975.9
Current liabilities:
Current portion of debt	79.9	135.3
Accounts payable	1.1	0.7
Other current liabilities	51.8	18.6
Intercompany payables	57.7
Total current liabilities	190.5	154.6
Long-term debt due after one year	6,706.4	6,608.0
Intercompany notes payable	753.3	636.3
Other long-term liabilities	35.3	12.9
Total stockholders’ equity	11,476.2	11,564.1
Total equity	11,476.2	11,564.1
Total Liabilities and Equity	19,161.7	18,975.9
Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	178.4	17.8
Accounts receivable	38.9	31.1
Inventories	239.9	254.3
Other current assets	6.3	11.8
Intercompany receivables	0.3
Total current assets	463.8	315.0
Property, plant and equipment, net	14.8	18.9
Goodwill	1,158.6	1,158.6
Intangibles, net	1,409.9	1,485.0
Intercompany notes receivable	149.8	156.9
Investments in consolidated subsidiaries	19,827.1	20,103.6
Other assets	233.8	185.3
Total Assets	23,257.8	23,423.3
Current liabilities:
Current portion of debt		108.9
Accounts payable	24.2	31.3
Accrued compensation and benefits	14.5	14.5
Other current liabilities	107.7	83.8
Intercompany payables	470.6	1,052.9
Total current liabilities	617.0	1,291.4
Long-term debt due after one year	1,972.0	1,982.9
Intercompany notes payable	2,068.0	2,390.5
Pension liabilities, net of current portion	141.6	147.6
Postretirement benefit liabilities, net of current portion	25.2	25.7
Deferred income taxes	310.0	278.9
Other long-term liabilities	152.5	131.2
Total stockholders’ equity	17,971.5	17,175.1
Total equity	17,971.5	17,175.1
Total Liabilities and Equity	23,257.8	23,423.3
Non-Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	113.1	133.8
Accounts receivable	2,092.7	2,201.7
Inventories	1,897.8	1,853.2
Other current assets	483.4	483.2
Intercompany receivables	1,372.8	1,128.6
Assets held for sale	3.3	25.8
Total current assets	5,963.1	5,826.3
Property, plant and equipment, net	10,907.8	11,170.6
Goodwill	6,111.9	6,127.0
Intangibles, net	2,339.5	2,574.5
Restricted assets held by special purpose entities	1,269.2	1,274.3
Prepaid pension asset	305.9	224.7
Intercompany notes receivable	2,821.3	3,026.8
Other assets	1,515.6	971.8
Total Assets	31,234.3	31,196.0
Current liabilities:
Current portion of debt	133.2	316.9
Accounts payable	1,536.6	1,839.4
Accrued compensation and benefits	362.5	455.6
Other current liabilities	523.6	469.4
Intercompany payables	422.7
Total current liabilities	2,978.6	3,081.3
Long-term debt due after one year	1,161.9	911.4
Intercompany notes payable	304.7	311.9
Pension liabilities, net of current portion	129.7	146.4
Postretirement benefit liabilities, net of current portion	126.7	136.4
Non-recourse liabilities held by special purpose entities	1,138.7	1,145.2
Deferred income taxes	2,664.9	2,675.2
Other long-term liabilities	1,281.0	909.8
Redeemable noncontrolling interests	1.6	1.9
Total stockholders’ equity	21,429.7	21,862.2
Noncontrolling interests	16.8	14.3
Total equity	21,446.5	21,876.5
Total Liabilities and Equity	31,234.3	31,196.0
Eliminations [Member]
Current Assets:
Accounts receivable	(48.4)	(39.6)
Intercompany receivables	(1,397.1)	(1,356.3)
Total current assets	(1,445.5)	(1,395.9)
Intercompany notes receivable	(3,126.0)	(3,338.7)
Investments in consolidated subsidiaries	(50,877.4)	(50,601.4)
Other assets	(86.7)	(76.1)
Total Assets	(55,535.6)	(55,412.1)
Current liabilities:
Accounts payable	(48.4)	(39.6)
Intercompany payables	(1,397.1)	(1,356.3)
Total current liabilities	(1,445.5)	(1,395.9)
Intercompany notes payable	(3,126.0)	(3,338.7)
Deferred income taxes	(86.7)	(76.1)
Total stockholders’ equity	(50,877.4)	(50,601.4)
Total equity	(50,877.4)	(50,601.4)
Total Liabilities and Equity	$ (55,535.6)	$ (55,412.1)

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net cash provided by (used for) operating activities	$ 1,339.0	$ 1,399.6
Investing activities:
Capital expenditures	(860.2)	(976.8)
Cash paid related to business combinations, net of cash acquired		(3,368.3)
Investment in unconsolidated entities	(1.0)	(10.4)
Proceeds from sale of property, plant and equipment	22.5	108.3
Proceeds from property, plant and equipment insurance settlement	2.4	16.5
Other, net	10.9	30.0
Net cash used for investing activities	(825.4)	(4,200.7)
Financing activities:
Proceeds from issuance of notes	598.6	2,498.2
Additions to revolving credit facilities	413.0	192.2
Repayments of revolving credit facilities	(478.2)	(177.2)
Additions to debt	683.1	4,441.0
Repayments of debt	(1,195.8)	(4,665.0)
(Repayments) additions to commercial paper, net	(9.3)	445.6
Other debt (repayments) additions, net	(69.2)	45.9
Issuances of common stock, net of related minimum tax withholdings	16.7	8.6
Purchases of common stock		(88.6)
Cash dividends paid to stockholders	(292.6)	(350.7)
Cash distributions paid to noncontrolling interests	(1.4)	(3.4)
Other, net	(17.0)	(7.1)
Net cash (used for) provided by financing activities	(352.1)	2,339.5
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(21.6)	3.9
Increase (decrease) in cash, cash equivalents and restricted cash	139.9	(457.7)
Cash, cash equivalents and restricted cash at beginning of period	151.6	636.8
Cash, cash equivalents and restricted cash at end of period	291.5	179.1
Parent [Member]
Operating activities:
Net cash provided by (used for) operating activities	275.9	430.7
Investing activities:
Intercompany capital investment		(563.0)
Net cash used for investing activities		(563.0)
Financing activities:
Issuances of common stock, net of related minimum tax withholdings	16.7	8.6
Purchases of common stock		(88.6)
Cash dividends paid to stockholders	(292.6)	(350.7)
Intercompany capital receipt		563.0
Net cash (used for) provided by financing activities	(275.9)	132.3
Issuer [Member]
Operating activities:
Net cash provided by (used for) operating activities	(38.1)	(512.4)
Investing activities:
Intercompany notes proceeds		9.2
Intercompany capital investment		(563.0)
Net cash used for investing activities		(553.8)
Financing activities:
Proceeds from issuance of notes	598.6	2,498.2
Additions to revolving credit facilities	350.0	67.2
Repayments of revolving credit facilities	(350.0)	(67.2)
Additions to debt		4,101.8
Repayments of debt	(500.0)	(2,187.1)
(Repayments) additions to commercial paper, net	(9.3)	445.6
Other debt (repayments) additions, net	(46.0)	35.3
Intercompany notes payments		(3,800.0)
Other, net	(5.2)	(27.8)
Net cash (used for) provided by financing activities	38.1	1,066.0
Increase (decrease) in cash, cash equivalents and restricted cash		(0.2)
Cash, cash equivalents and restricted cash at beginning of period		0.2
Guarantor Subsidiaries [Member]
Operating activities:
Net cash provided by (used for) operating activities	250.6	445.9
Investing activities:
Capital expenditures		(2.5)
Proceeds from sale of property, plant and equipment	0.1
Intercompany notes issued		(0.1)
Intercompany notes proceeds	5.0	4.3
Other, net	9.9	28.2
Net cash used for investing activities	15.0	29.9
Financing activities:
Additions to debt		(1.0)
Repayments of debt	(105.0)	(958.6)
Intercompany notes borrowing		75.7
Intercompany notes payments		(70.2)
Net cash (used for) provided by financing activities	(105.0)	(954.1)
Increase (decrease) in cash, cash equivalents and restricted cash	160.6	(478.3)
Cash, cash equivalents and restricted cash at beginning of period	17.8	490.8
Cash, cash equivalents and restricted cash at end of period	178.4	12.5
Non-Guarantor Subsidiaries [Member]
Operating activities:
Net cash provided by (used for) operating activities	850.6	1,035.4
Investing activities:
Capital expenditures	(860.2)	(974.3)
Cash paid related to business combinations, net of cash acquired		(3,368.3)
Investment in unconsolidated entities	(1.0)	(10.4)
Proceeds from sale of property, plant and equipment	22.4	108.3
Proceeds from property, plant and equipment insurance settlement	2.4	16.5
Intercompany notes issued		(75.7)
Intercompany notes proceeds		3,870.2
Other, net	1.0	1.8
Net cash used for investing activities	(835.4)	(431.9)
Financing activities:
Additions to revolving credit facilities	63.0	125.0
Repayments of revolving credit facilities	(128.2)	(110.0)
Additions to debt	683.1	340.2
Repayments of debt	(590.8)	(1,519.3)
Other debt (repayments) additions, net	(23.2)	10.6
Cash distributions paid to noncontrolling interests	(1.4)	(3.4)
Intercompany notes borrowing		0.1
Intercompany notes payments	(5.0)	(13.5)
Intercompany capital receipt		563.0
Other, net	(11.8)	20.7
Net cash (used for) provided by financing activities	(14.3)	(586.6)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(21.6)	3.9
Increase (decrease) in cash, cash equivalents and restricted cash	(20.7)	20.8
Cash, cash equivalents and restricted cash at beginning of period	133.8	145.8
Cash, cash equivalents and restricted cash at end of period	113.1	166.6
Eliminations [Member]
Investing activities:
Intercompany notes issued		75.8
Intercompany notes proceeds	(5.0)	(3,883.7)
Intercompany capital investment		1,126.0
Net cash used for investing activities	(5.0)	(2,681.9)
Financing activities:
Intercompany notes borrowing		(75.8)
Intercompany notes payments	5.0	3,883.7
Intercompany capital receipt		(1,126.0)
Net cash (used for) provided by financing activities	$ 5.0	$ 2,681.9

Selected Condensed Consolidating Financial Statements of Parent, Issuer, Guarantors and Non-Guarantors - Noncash Operating, Investing and Financing Activities (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Parent [Member]
Operating activities:
Intercompany receivables		$ (140.9)
Investing activities:
Intercompany capital investment	$ (407.3)	(10,396.2)
Intercompany return of capital	442.0	606.7
Financing activities:
Intercompany capital distribution		(563.0)
Issuer [Member]
Investing activities:
Intercompany notes issued		(3,800.0)
Intercompany notes proceeds		4,519.8
Intercompany capital investment	(625.6)	(5,895.5)
Intercompany return of capital	21.2	1,479.6
Financing activities:
Intercompany notes borrowing	117.0	4,436.3
Intercompany capital receipt		10,396.2
Intercompany capital distribution	(442.0)	(606.7)
Guarantor Subsidiaries [Member]
Investing activities:
Intercompany notes issued	(63.6)	(4,666.4)
Intercompany notes proceeds	65.8	4,519.8
Intercompany capital investment	(917.8)	(6,880.5)
Intercompany return of capital	619.7	1,021.4
Financing activities:
Intercompany notes borrowing		479.1
Intercompany notes payments	(322.5)	(959.6)
Intercompany capital receipt	625.2	5,413.7
Intercompany capital distribution	(21.2)	(457.5)
Intercompany dividends paid	(48.3)	(302.2)
Non-Guarantor Subsidiaries [Member]
Operating activities:
Intercompany payables		140.9
Investing activities:
Intercompany notes issued	(117.0)	(8,715.4)
Intercompany notes proceeds	322.5	4,759.6
Financing activities:
Intercompany notes borrowing	63.6	12,266.4
Intercompany notes payments	(65.8)	(12,839.6)
Intercompany capital receipt	1,325.5	7,362.3
Intercompany capital distribution	(619.7)	(1,480.5)
Intercompany dividends paid	(1,436.9)	(1,419.6)
Eliminations [Member]
Operating activities:
Intercompany receivables		140.9
Intercompany payables		(140.9)
Investing activities:
Intercompany notes issued	180.6	17,181.8
Intercompany notes proceeds	(388.3)	(13,799.2)
Intercompany capital investment	1,950.7	23,172.2
Intercompany return of capital	(1,082.9)	(3,107.7)
Financing activities:
Intercompany notes borrowing	(180.6)	(17,181.8)
Intercompany notes payments	388.3	13,799.2
Intercompany capital receipt	(1,950.7)	(23,172.2)
Intercompany capital distribution	1,082.9	3,107.7
Intercompany dividends paid	$ 1,485.2	$ 1,721.8

Leases - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2020	Oct. 01, 2019
Lessee Lease Description [Line Items]
ROU assets	$ 649.2
Operating lease liabilities	$ 704.5
ASC 842 [Member]
Lessee Lease Description [Line Items]
ROU assets		$ 731.1
Operating lease liabilities		$ 783.9

Leases - Schedule of Components of Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Lease Cost [Abstract]
Operating lease costs	$ 50.0	$ 150.0
Variable and short-term lease costs	25.6	79.6
Sublease income	(1.5)	(5.0)
Finance lease cost:
Amortization of lease assets	2.5	8.0
Interest on lease liabilities	1.9	6.0
Total lease cost, net	$ 78.5	$ 238.6

Leases - Summary of Supplemental Balance Sheet Information Related to Leases (Details) $ in Millions	Jun. 30, 2020 USD ($)
Supplementary Information Balance Sheets [Abstract]
Operating lease right-of-use asset	$ 649.2
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseRightOfUseAsset
Current operating lease liabilities	$ 169.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseLiabilityCurrent
Operating lease liabilities	$ 535.5
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseLiabilityNoncurrent
Total operating lease liabilities	$ 704.5
Property, plant and equipment	145.6
Accumulated depreciation	(19.0)
Property, plant and equipment, net	126.6
Current finance lease liabilities	$ 9.3
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:FinanceLeaseLiabilityCurrent
Noncurrent finance lease liabilities	$ 268.5
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:FinanceLeaseLiabilityNoncurrent
Total finance lease liabilities	$ 277.8

Leases - Summary of Lease Term and Discount Rate (Details)	Jun. 30, 2020
Weighted average remaining lease term:
Operating leases	5 years 10 months 24 days
Finance leases	9 years 2 months 12 days
Weighted average discount rate:
Operating leases	2.70%
Finance leases	4.00%

Leases - Summary of Supplemental Cash Flow Information Related to Leases (Details) $ in Millions	9 Months Ended
	Jun. 30, 2020 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows related to operating leases	$ 151.7
Operating cash flows related to finance leases	6.5
Financing cash flows related to finance leases	$ 7.7

Leases - Summary of Maturity of Lease Liabilities (Details)
$ in Millions

Jun. 30, 2020

USD ($)

Operating Leases, Remaining fiscal 2020

$ 50.3

Operating Leases, Fiscal 2021

177.1

Operating Leases, Fiscal 2022

140.3

Operating Leases, Fiscal 2023

110.0

Operating Leases, Fiscal 2024

87.8

Operating Leases, Thereafter

203.5

Operating Leases, Total lease payments

769.0

Operating Leases, Less: Interest

(64.5)

^[1]

Operating Leases, Present value of future lease payments

704.5

Finance Leases, Remaining fiscal 2020

4.3

Finance Leases, Fiscal 2021

16.1

Finance Leases, Fiscal 2022

15.2

Finance Leases, Fiscal 2023

13.3

Finance Leases, Fiscal 2024

12.1

Finance Leases, Thereafter

300.9

Finance Leases, Total lease payments

361.9

Finance Leases, Less: Interest

(84.1)

^[1]

Finance Leases, Present value of future lease payments

277.8

Remaining fiscal 2020

54.6

193.2

155.5

123.3

99.9

504.4

1,130.9

(148.6)

^[1]

Present value of future lease payments

$ 982.3

[1]	^{Calculated using the interest rate for each lease.}

Leases - Summary of Future Minimum Payments Under All Existing Non-cancelable Operating Leases (Details) $ in Millions	Sep. 30, 2019 USD ($)
Leases [Abstract]
Fiscal 2020	$ 214.3
Fiscal 2021	180.1
Fiscal 2022	136.3
Fiscal 2023	108.3
Fiscal 2024	85.3
Thereafter	206.1
Total	$ 930.4

Commitments and Contingencies - Additional Information (Details) R$ in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2020 USD ($) lawsuit	Jun. 30, 2020 USD ($) lawsuit Subsidiary	Jun. 30, 2020 BRL (R$) Subsidiary
Commitments and Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 8.1	$ 8.1
Number of Lawsuits the Company Has Been Named a Defendant in Asbestos-related Personal Injury Litigation \| lawsuit	1,125	1,125
Guarantor Obligations, Estimated Exposure, Undiscounted	$ 50.0	$ 50.0
Guarantor Obligations, Current Carrying Value	9.7	9.7
Indirect tax claim - reduction of cost of goods sold	4.2	27.7
Indirect tax claim - reduction of interest expense, net	6.0	17.6
Brazil Administrative Council of Tax Appeals [Member]
Commitments and Contingencies [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		$ 127.0	R$ 691
Tax claim and conversion description		The matter has proceeded through the Brazil Administrative Council of Tax Appeals (“CARF”) principally in two proceedings, covering tax years 2003 to 2008 and 2009 to 2012.	The matter has proceeded through the Brazil Administrative Council of Tax Appeals (“CARF”) principally in two proceedings, covering tax years 2003 to 2008 and 2009 to 2012.
Income tax settlement claim liability	0.0	$ 0.0
Tax claim and conversion, tax dispute related to tax years description		2003 to 2008	2003 to 2008
Tax claim and conversion, tax penalties relating to tax years description		2009 to 2012	2009 to 2012
Tax claim and conversion proceedings covering tax years description		2003 to 2008 and 2009 to 2012	2003 to 2008 and 2009 to 2012
Brazil [Member]
Commitments and Contingencies [Line Items]
Number of subsidiaries \| Subsidiary		2	2
Other Long Term Liabilities [Member]
Commitments and Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	2.9	$ 2.9
Other Current Liabilities [Member]
Commitments and Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 5.2	$ 5.2

Equity and Other Comprehensive Income (Loss) - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019	Nov. 02, 2018	Jul. 01, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Stock repurchase program, number of shares authorized to be repurchased					40.0
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01	$ 0.01	$ 0.01
Authorized share repurchase as a percentage of common stock outstanding					15.00%
Stock repurchase program, remaining number of shares authorized to be repurchased	19.1
Treasury stock, shares, acquired	0.0	2.1
Purchases of common stock		$ 88.6
Minimum [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Effective Tax Rate, Net of Tax Components of Other Comprehensive Income	25.00%	25.00%
Maximum [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Effective Tax Rate, Net of Tax Components of Other Comprehensive Income	26.00%	26.00%

Equity and Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Millions

9 Months Ended

Jun. 30, 2020

Jun. 30, 2019

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other comprehensive loss before reclassifications

^[1]

$ (1,069.2)

$ (695.3)

^[1]

(275.3)

(13.7)

Amounts reclassified from accumulated other comprehensive loss

^[1]

30.5

13.6

Net current period other comprehensive (loss) income

^[1]

(244.8)

(0.1)

^[1]

(73.4)

Accumulated Net Gain (Loss) from Designated or Quality Cash Flow Hedges [Member]

^[1]

(1,387.4)

(695.4)

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other comprehensive loss before reclassifications

0.7

(0.2)

(10.1)

Amounts reclassified from accumulated other comprehensive loss

2.2

Net current period other comprehensive (loss) income

(7.9)

Accumulated Defined Benefit Plans Adjustment [Member]

(7.2)

(0.2)

Accumulated Other Comprehensive Income (Loss) [Line Items]

Amounts reclassified from accumulated other comprehensive loss

(698.0)

(465.9)

28.3

13.6

Net current period other comprehensive (loss) income

28.3

13.6

(73.4)

Accumulated Translation Adjustment [Member]

(743.1)

(452.3)

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other comprehensive loss before reclassifications

(371.9)

(229.2)

(265.2)

(13.7)

Net current period other comprehensive (loss) income

(265.2)

(13.7)

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

$ (637.1)

$ (242.9)

[1]	All amounts are net of tax and noncontrolling interests.

Equity and Other Comprehensive Income (Loss) - Summary of Reclassification out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Jun. 30, 2020

Jun. 30, 2019

Jun. 30, 2020

Jun. 30, 2019

Amortization and settlement recognition of net actuarial loss, included in pension cost

$ 9.0

$ 4.5

$ 26.2

$ 12.6

Amortization of prior service costs, Net of Tax

1.0

0.4

2.5

1.3

Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax

^[1]

73.4

1.0

2.2

Parent [Member]

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Amortization of net actuarial loss, Pre-Tax Amount

^[2],[3]

(11.4)

(5.9)

(34.5)

(16.6)

Amortization of net actuarial loss, Tax

^[2],[3]

2.6

1.5

8.7

4.3

Amortization and settlement recognition of net actuarial loss, included in pension cost

^[2],[3]

(8.8)

(4.4)

(25.8)

(12.3)

Amortization of prior service costs, Pre-Tax Amount

^[2],[3]

(1.3)

(0.5)

(3.3)

(1.7)

Amortization of prior service costs, Tax

^[2],[3]

0.3

0.1

0.8

0.4

Amortization of prior service costs, Net of Tax

^[2],[3]

(1.0)

(0.4)

(2.5)

(1.3)

Defined Benefit Plans, before Tax

^[2]

(12.7)

(6.4)

(37.8)

(18.3)

Defined Benefit Plans, Tax

^[2]

2.9

1.6

82.9

4.7

Defined Benefit Plans, Net of Tax

^[2]

(9.8)

(4.8)

45.1

(13.6)

Total Reclassifications From Other Comprehensive Income Before Tax

^[2]

(14.1)

(6.4)

(40.8)

(18.3)

Total Reclassifications From Other Comprehensive Income Tax Portion

^[2]

3.2

1.6

83.7

4.7

Total Reclassifications From Other Comprehensive Income Net of Tax

^[2]

(10.9)

$ (4.8)

42.9

$ (13.6)

Parent [Member] | Cash Flow Hedges [Member]

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax

^[2]

(3.0)

Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax

^[2]

0.8

Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax

^[2]

(2.2)

Parent [Member] | ASU 2018-02 [Member]

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]