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Debt - Narrative (Detail)				3 Months Ended		9 Months Ended
Debt - Narrative (Detail)	Jun. 30, 2023 USD ($)	Jan. 27, 2023 USD ($)	Nov. 01, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 EUR (€)	Sep. 30, 2022 EUR (€)
Debt Instrument [Line Items]
Debt instrument, covenant, total indebtedness to EBITDA ratio	3.50			3.50		3.50		3.50
Loss on extinguishment of debt				$ (4,000,000)	$ 0	$ (4,000,000)	$ 0
Interest expense, net				38,000,000	32,000,000	105,000,000	94,000,000
Interest Expense, Debt				$ 41,000,000	$ 32,000,000	$ 115,000,000	$ 93,000,000
Weighted-average interest rate of total debt	4.10%			4.10%	3.30%	4.10%	3.30%	4.10%	3.50%
2.750% Senior Secured Notes due 2028 \| Acquisition Corp.
Debt Instrument [Line Items]
Interest rate	2.75%			2.75%		2.75%		2.75%	2.75%
Face or principal amount of debt instrument \| €								€ 325,000,000	€ 325,000,000
3.750% Senior Secured Notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%			3.75%	3.75%	3.75%	3.75%	3.75%
3.750% Senior Secured Notes due 2029 \| Acquisition Corp.
Debt Instrument [Line Items]
Interest rate	3.75%			3.75%		3.75%		3.75%	3.75%
3.875% Senior Secured Notes due 2030 \| Acquisition Corp.
Debt Instrument [Line Items]
Interest rate	3.875%			3.875%		3.875%		3.875%	3.875%
2.250% Senior Secured Notes due 2031 \| Acquisition Corp.
Debt Instrument [Line Items]
Interest rate	2.25%			2.25%		2.25%		2.25%	2.25%
Face or principal amount of debt instrument \| €								€ 445,000,000	€ 445,000,000
3.000% Senior Secured Notes due 2031 \| Acquisition Corp.
Debt Instrument [Line Items]
Interest rate	3.00%			3.00%		3.00%		3.00%	3.00%
Senior Term Loan Facility \| Acquisition Corp.
Debt Instrument [Line Items]
Line of credit facility, increase			$ 150,000,000
Maximum commitments under the facility	$ 1,295,000,000		$ 1,295,000,000	$ 1,295,000,000		$ 1,295,000,000
Repayments of secured debt	150,000,000
Loss on extinguishment of debt				4,000,000		4,000,000
Term Loan Mortgage \| Acquisition Corp.
Debt Instrument [Line Items]
Face or principal amount of debt instrument		$ 19,000,000
Term Loan Mortgage \| Acquisition Corp. \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, marginal interest rate		1.40%
Senior Notes
Debt Instrument [Line Items]
Scheduled maturities of long-term debt in 2023	0			0		0
Scheduled maturities of long-term debt in 2024	0			0		0
Scheduled maturities of long-term debt in 2025	0			0		0
Scheduled maturities of long-term debt in 2026	0			0		0
Scheduled maturities of long-term debt, 2027	0			0		0
Scheduled maturities of long-term debt, 2028	354,000,000			354,000,000		354,000,000
Scheduled maturities of long-term debt, thereafter	$ 2,360,000,000			$ 2,360,000,000		$ 2,360,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, covenant, total indebtedness to EBITDA ratio	3.50			3.50		3.50		3.50