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Debt - Long-term Debt (Detail) € in Millions | Dec. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€) | Nov. 30, 2023 USD ($) | Nov. 29, 2023 USD ($) | Sep. 30, 2023 USD ($)
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Total long-term debt, including the current portion | $ 4,041,000,000 |  |  |  | $ 4,002,000,000
Issuance premium less unamortized discount and unamortized deferred financing costs | (37,000,000) |  |  |  | (38,000,000)
Total long-term debt, including the current portion, net | 4,004,000,000 |  |  |  | 3,964,000,000
Acquisition Corp. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total long-term debt, including the current portion | 1,295,000,000 |  |  |  |
Acquisition Corp. | Senior Term Loan Facility due 2028 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total long-term debt, including the current portion | $ 1,295,000,000 |  |  |  | 1,295,000,000
Acquisition Corp. | 2.750% Senior Secured Notes due 2028 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate | 2.75% | 2.75% |  |  |
Face or principal amount of debt instrument | € |  | € 325 |  |  |
Total long-term debt, including the current portion | $ 360,000,000 |  |  |  | 343,000,000
Acquisition Corp. | 3.750% Senior Secured Notes due 2029 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate | 3.75% | 3.75% |  |  |
Total long-term debt, including the current portion | $ 540,000,000 |  |  |  | 540,000,000
Acquisition Corp. | 3.875% Senior Secured Notes due 2030 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate | 3.875% | 3.875% |  |  |
Total long-term debt, including the current portion | $ 535,000,000 |  |  |  | 535,000,000
Acquisition Corp. | 2.250% Senior Secured Notes due 2031 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate | 2.25% | 2.25% |  |  |
Face or principal amount of debt instrument | € |  | € 445 |  |  |
Total long-term debt, including the current portion | $ 493,000,000 |  |  |  | 471,000,000
Acquisition Corp. | 3.000% Senior Secured Notes due 2031 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate | 3.00% | 3.00% |  |  |
Total long-term debt, including the current portion | $ 800,000,000 |  |  |  | 800,000,000
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
Acquisition Corp. | Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total long-term debt, including the current portion | 0 |  |  |  | 0
Commitments under revolving credit facility | 350,000,000 |  | $ 350,000,000 | $ 300,000,000 | 300,000,000
Letters of credit outstanding | 4,000,000 |  |  |  | 2,000,000
Revolving credit facility outstanding | $ 0 |  |  |  | $ 0

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