Revenue Recognition (Tables)

6 Months Ended

Mar. 31, 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 March 31, 2020
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total
Primary Geographical Markets
North America	$	2,765.7	$	1,281.6	$	—	$	(51.4	)	$	3,995.9
South America		100.7		18.8		—		—			119.5
Europe		2.5		253.4		—		—			255.9
Asia Pacific		13.6		62.5		—		(0.1	)		76.0
Total	$	2,882.5	$	1,616.3	$	—	$	(51.5	)	$	4,447.3

	Six Months Ended March 31, 2020
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total
Primary Geographical Markets
North America	$	5,554.6	$	2,480.4	$	18.9	$	(92.9	)	$	7,961.0
South America		208.3		38.8		—		—			247.1
Europe		4.3		498.0		—		—			502.3
Asia Pacific		24.8		136.0		—		(0.2	)		160.6
Total	$	5,792.0	$	3,153.2	$	18.9	$	(93.1	)	$	8,871.0

	Three Months Ended March 31, 2019
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total
Primary Geographical Markets
North America	$	2,865.3	$	1,308.3	$	0.8	$	(39.8	)	$	4,134.6
South America		109.6		17.9		—		—			127.5
Europe		—		269.6		—		—			269.6
Asia Pacific		15.8		72.5		—		—			88.3
Total	$	2,990.7	$	1,668.3	$	0.8	$	(39.8	)	$	4,620.0

	Six Months Ended March 31, 2019
(In millions)	Corrugated Packaging		Consumer Packaging		Land and Development		Intersegment Sales			Total
Primary Geographical Markets
North America	$	5,471.7	$	2,564.7	$	14.7	$	(77.7	)	$	7,973.4
South America		218.4		37.4		—		—			255.8
Europe		—		530.1		—		—			530.1
Asia Pacific		34.4		154.9		—		(1.2	)		188.1
Total	$	5,724.5	$	3,287.1	$	14.7	$	(78.9	)	$	8,947.4

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 - March 31, 2020		198.0		23.8
Increase / (Decrease)	$	10.0	$	16.1