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Period Type:

Debt - Additional Information (Detail)					3 Months Ended		9 Months Ended
Debt - Additional Information (Detail)	Jun. 30, 2024 USD ($)	Jun. 29, 2024	Jan. 24, 2024 USD ($) Rate	Jan. 27, 2023	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Nov. 30, 2023 USD ($)	Nov. 29, 2023 USD ($)	Sep. 30, 2023 USD ($)
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 4,013,000,000				$ 4,013,000,000		$ 4,013,000,000				$ 4,002,000,000
Debt instrument, covenant, total indebtedness to EBITDA ratio	3.50				3.50		3.50
Partial repayment of Senior Term Loan Facility refinancing							$ 42,000,000	$ 0
Interest expense, net					$ 40,000,000	$ 38,000,000	121,000,000	105,000,000
Interest expense, debt					$ 46,000,000	$ 41,000,000	$ 137,000,000	$ 115,000,000
Weighted-average interest rate of total debt	4.50%				4.50%	4.10%	4.50%	4.10%			4.10%
Third-Parties
Debt Instrument [Line Items]
Debt fees			$ 3,000,000
Creditors
Debt Instrument [Line Items]
Debt fees			$ 2,000,000
Senior Notes
Debt Instrument [Line Items]
Long-term debt, maturities, repayments of principal in next rolling twelve months	$ 0				$ 0		$ 0
Long-term debt, maturities, repayments of principal in rolling year five	348,000,000				348,000,000		348,000,000
Long term debt maturities repayments of principal in rolling after year five	$ 2,352,000,000				$ 2,352,000,000		$ 2,352,000,000
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Debt instrument, covenant, total indebtedness to EBITDA ratio	3.50				3.50		3.50
2020 Revolving Loans \| Revolving Credit Facility \| Eurodollar Applicable Margin Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.375%	1.875%
2020 Revolving Loans \| Revolving Credit Facility \| ABR Applicable Margin Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	0.375%	0.875%
Mortgage Term Loan due 2033
Debt Instrument [Line Items]
Partial proceeds from Senior Term Loan Facility refinancing							$ 0	$ 19,000,000
Senior Term Loan Facility due 2024
Debt Instrument [Line Items]
Partial proceeds from Senior Term Loan Facility refinancing							42,000,000	$ 146,000,000
Acquisition Corp.
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 1,295,000,000				$ 1,295,000,000		1,295,000,000
Debt instrument, marginal interest rate \| Rate			2.00%
Acquisition Corp. \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate \| Rate			0.50%
Acquisition Corp. \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, marginal interest rate \| Rate			1.00%
Acquisition Corp. \| Base Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate			1.00%
Acquisition Corp. \| Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt, including the current portion	0				0		0				$ 0
Debt instrument, covenant, total indebtedness to EBITDA ratio									3.60
Commitments under revolving credit facility	$ 350,000,000				$ 350,000,000		$ 350,000,000		$ 350,000,000	$ 300,000,000	300,000,000
Increase in secured indebtedness to EBITDA									140,000,000	$ 105,000,000
Secured indebtedness of EBITDA									$ 250,000,000
Senior secured indebtedness to EBITDA ratio									5.00
Senior secured indebtedness, maximum amount									$ 500,000,000
Term loan base rate plus election rate	1.00%				1.00%		1.00%
Interest rate applicable to overdue principal							2.00%
Acquisition Corp. \| Revolving Credit Facility \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							0.50%
Acquisition Corp. \| 2.750% Senior Secured Notes due 2028
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 348,000,000				$ 348,000,000		$ 348,000,000				343,000,000
Interest rate	2.75%				2.75%		2.75%
Acquisition Corp. \| 3.750% Senior Secured Notes due 2029
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 540,000,000				$ 540,000,000		$ 540,000,000				540,000,000
Interest rate	3.75%				3.75%		3.75%
Acquisition Corp. \| 3.875% Senior Secured Notes due 2030
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 535,000,000				$ 535,000,000		$ 535,000,000				535,000,000
Interest rate	3.875%				3.875%		3.875%
Acquisition Corp. \| 2.250% Senior Secured Notes due 2031
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 477,000,000				$ 477,000,000		$ 477,000,000				471,000,000
Interest rate	2.25%				2.25%		2.25%
Acquisition Corp. \| 3.000% Senior Secured Notes due 2031
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 800,000,000				$ 800,000,000		$ 800,000,000				800,000,000
Interest rate	3.00%				3.00%		3.00%
Acquisition Corp. \| Initial Revolving Loans \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							0.75%
Acquisition Corp. \| Initial Revolving Loans \| Revolving Credit Facility \| London Interbank Offered Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							1.75%
Acquisition Corp. \| 2020 Revolving Loans \| Revolving Credit Facility
Debt Instrument [Line Items]
Senior secured indebtedness to EBITDA ratio	2.41				2.41		2.41
Debt instrument, marginal interest rate							0.875%
Acquisition Corp. \| 2020 Revolving Loans \| Revolving Credit Facility \| London Interbank Offered Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							1.875%
Acquisition Corp. \| Senior Term Loan Facility -Tranche G \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							0.50%
Acquisition Corp. \| Senior Term Loan Facility -Tranche G \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							2.00%
Acquisition Corp. \| Senior Term Loan Facility -Tranche G \| Base Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate							1.00%
Term loan base rate plus election rate	1.00%				1.00%		1.00%
Additional Interest rate on other overdue amounts							2.00%
Acquisition Corp. \| Mortgage Term Loan due 2033
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 18,000,000				$ 18,000,000		$ 18,000,000				$ 18,000,000
Acquisition Corp. \| Mortgage Term Loan due 2033 \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, marginal interest rate				1.40%