Debt and Financing Arrangements - Narrative (Details)			1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 EUR (€)	Mar. 31, 2024 USD ($)	Dec. 31, 2023	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2024 EUR (€)	Oct. 01, 2023	Mar. 31, 2023 EUR (€)	Feb. 28, 2023 EUR (€)
Debt Instrument [Line Items]
Total interest paid							$ 97,000,000	$ 80,000,000
Proceeds from sale and collection of receivables	$ 131,000,000	$ 170,000,000
Supplier finance program, obligation, current	62,000,000	50,000,000			$ 62,000,000		62,000,000
Senior notes
Debt Instrument [Line Items]
Proceeds from issuance of senior long-term debt			$ 988,000,000
7.000 % Senior Secured Notes Due 2028 | Senior notes
Debt Instrument [Line Items]
Face amount of debt (up to)			500,000,000					$ 500,000,000
Proceeds from issuance of senior long-term debt			$ 494,000,000
Interest rate			7.00%					7.00%			7.00%
8.250% Senior unsecured Notes Due 2031 | Unsecured debt
Debt Instrument [Line Items]
Face amount of debt (up to)			$ 500,000,000					$ 500,000,000
Proceeds from issuance of senior long-term debt			$ 494,000,000
Interest rate			8.25%					8.25%			8.25%
3.50% Notes due in 2024 | Unsecured debt
Debt Instrument [Line Items]
Payment of debt issuance cost			$ 16,000,000
Long-term debt, gross	$ 133,000,000	130,000,000			$ 133,000,000		$ 133,000,000		€ 123,000,000
Face amount of debt (up to) | €												€ 823,000,000
Interest rate	3.50%		3.50%		3.50%		3.50%	3.50%	3.50%		3.50%
Repurchased face amount			$ 743,000,000					$ 743,000,000			€ 700,000,000
Debt instrument, unamortized premium			7,000,000					7,000,000			7,000,000
Accrued and unpaid interest			3,000,000					$ 3,000,000			€ 3,000,000
Write off of deferred debt issuance cost			2,000,000	€ 2,000,000
4.875% Notes due in 2026 | Unsecured debt
Debt Instrument [Line Items]
Long-term debt, gross	$ 795,000,000	795,000,000			$ 795,000,000		$ 795,000,000
Face amount of debt (up to)	$ 795,000,000	795,000,000			$ 795,000,000		$ 795,000,000
Interest rate	4.875%				4.875%		4.875%		4.875%
Minimum
Debt Instrument [Line Items]
Supplier finance program, payment period										45 days
Maximum
Debt Instrument [Line Items]
Supplier finance program, payment period										120 days
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,250,000,000				$ 1,250,000,000		$ 1,250,000,000
Payment of debt issuance cost							7,000,000
Credit facility expansion							250,000,000
Remaining borrowing capacity	974,000,000				974,000,000		$ 974,000,000
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee on unused portion of commitments							0.25%
Revolving Credit Facility | Minimum | EURIBOR
Debt Instrument [Line Items]
Basis spread							1.50%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee on unused portion of commitments							0.375%
Revolving Credit Facility | Maximum | EURIBOR
Debt Instrument [Line Items]
Basis spread							2.00%
Revolving Credit Facility | North American Subfacility
Debt Instrument [Line Items]
Maximum borrowing capacity	950,000,000				950,000,000		$ 950,000,000
Revolving Credit Facility | European Subfacility
Debt Instrument [Line Items]
Maximum borrowing capacity	300,000,000				300,000,000		300,000,000
Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	150,000,000				150,000,000		150,000,000
Remaining borrowing capacity	11,000,000				11,000,000		11,000,000
Term Loan | Term Loan B due in 2031
Debt Instrument [Line Items]
Debt instrument, modification cost					5,000,000
Debt issuance costs, gross	4,000,000				$ 4,000,000		4,000,000
Term Loan | Term Loan B due in 2031
Debt Instrument [Line Items]
Basis spread					2.75%	3.25%
Long-term debt, gross	635,000,000	$ 635,000,000			$ 635,000,000		635,000,000
Face amount of debt (up to)	$ 750,000,000				$ 750,000,000		$ 750,000,000
First lien secured net leverage ratio							1.75
Repayments of secured debt			$ 350,000,000