Revenue Recognition (Tables)

6 Months Ended

Mar. 31, 2022

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 March 31, 2022
(In millions)	Corrugated Packaging		Consumer Packaging		Paper		Distribution		Intersegment Sales			Total
Primary Geographical Markets
U.S.	$	2,068.1	$	720.0	$	1,376.3	$	319.1	$	(85.8	)	$	4,397.7
Canada		145.9		128.4		62.2		3.8		(2.0	)		338.3
Latin America		104.7		48.3		65.0		39.4		(0.1	)		257.3
EMEA (1)		0.3		277.0		17.6		—		—			294.9
Asia Pacific		—		76.9		17.0		—		—			93.9
Total	$	2,319.0	$	1,250.6	$	1,538.1	$	362.3	$	(87.9	)	$	5,382.1

(1)Europe, Middle East and Africa ("EMEA")

	Six Months Ended March 31, 2022
(In millions)	Corrugated Packaging		Consumer Packaging		Paper		Distribution		Intersegment Sales			Total
Primary Geographical Markets
U.S.	$	4,037.1	$	1,368.3	$	2,589.4	$	603.7	$	(168.2	)	$	8,430.3
Canada		286.3		242.7		120.1		7.3		(3.3	)		653.1
Latin America		212.3		93.8		113.3		76.1		(0.2	)		495.3
EMEA		3.3		529.1		33.5		—		(0.1	)		565.8
Asia Pacific		—		155.4		34.4		—		—			189.8
Total	$	4,539.0	$	2,389.3	$	2,890.7	$	687.1	$	(171.8	)	$	10,334.3

	Three Months Ended March 31, 2021
(In millions)	Corrugated Packaging		Consumer Packaging		Paper		Distribution		Intersegment Sales			Total
Primary Geographical Markets
U.S.	$	1,816.9	$	597.5	$	1,022.0	$	246.1	$	(74.5	)	$	3,608.0
Canada		126.6		119.4		55.2		3.6		(1.5	)		303.3
Latin America		77.8		44.9		18.6		30.6		(0.1	)		171.8
EMEA		1.1		249.8		16.1		—		—			267.0
Asia Pacific		—		69.0		18.7		—		—			87.7
Total	$	2,022.4	$	1,080.6	$	1,130.6	$	280.3	$	(76.1	)	$	4,437.8

	Six Months Ended March 31, 2021
(In millions)	Corrugated Packaging		Consumer Packaging		Paper		Distribution		Intersegment Sales			Total
Primary Geographical Markets
U.S.	$	3,640.6	$	1,204.1	$	2,030.4	$	515.1	$	(148.4	)	$	7,241.8
Canada		251.2		232.8		98.6		7.2		(2.7	)		587.1
Latin America		148.1		84.8		29.1		61.8		(0.1	)		323.7
EMEA		2.0		482.8		32.3		—		—			517.1
Asia Pacific		—		138.6		31.1		—		(0.1	)		169.6
Total	$	4,041.9	$	2,143.1	$	2,221.5	$	584.1	$	(151.3	)	$	8,839.3

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 reported 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, 2021	$	199.1	$	12.8
Ending balance - March 31, 2022		231.7		17.5
Increase	$	32.6	$	4.7