Restructuring and Other Costs - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($) Segment T	Mar. 31, 2021 USD ($)	Sep. 30, 2021 Segment
Restructuring Cost and Reserve [Line Items]
Number of reportable segments | Segment			4		2
Restructuring and other costs | $	$ 363.4	$ 5.2	$ 365.7	$ 12.9
Panama City Mill [Member]
Restructuring Cost and Reserve [Line Items]
Annual capacity of production | T			645,000