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Debt - Additional Information (Detail) |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
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% |  |  |  |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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- Definition Amount of the fee that accompanies borrowing money under the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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