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Debt - Schedule of Long-term Debt (Details) € in Millions | Dec. 31, 2024 USD ($) | Dec. 31, 2024 EUR (€) | Sep. 30, 2024 USD ($)
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total long-term debt, including the current portion | $ 3,987,000,000 |  | $ 4,048,000,000
Issuance premium less unamortized discount and unamortized deferred financing costs | (32,000,000) |  | (34,000,000)
Total long-term debt, including the current portion, net | 3,955,000,000 |  | 4,014,000,000
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 2031 |  |  |
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 | $ 337,000,000 |  | 363,000,000
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 | $ 462,000,000 |  | 497,000,000
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
Letters of credit outstanding | 2,000,000 |  | 2,000,000
Revolving credit facility outstanding | $ 0 |  | $ 0

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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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