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v3.22.1

Debt - Additional Information (Detail) € in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2022 EUR (€) | Nov. 24, 2021 EUR (€) | Sep. 30, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest expense, net | $ 32,000,000 | $ 32,000,000 | $ 62,000,000 | $ 63,000,000 |  |  |
Weighted-average interest rate of total debt | 3.30% | 3.70% | 3.30% | 3.70% | 3.30% |  | 3.20%
2.750% Senior Secured Notes due 2028 | Acquisition Corp. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 2.75% |  | 2.75% |  | 2.75% |  |
Face or principal amount of debt instrument | € |  |  |  |  | € 325 |  |
3.875% Senior Secured Notes due 2030 | Acquisition Corp. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.875% |  | 3.875% |  | 3.875% |  |
3.000% Senior Secured Notes due 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% |  |
3.000% Senior Secured Notes due 2031 | Acquisition Corp. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.00% |  | 3.00% |  | 3.00% |  |
3.750% Senior Secured Notes due 2029 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 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% |
Face or principal amount of debt instrument | € |  |  |  |  |  | € 540 |
2.250% Senior Secured Notes due 2031 | Acquisition Corp. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 2.25% |  | 2.25% |  | 2.25% |  |
Face or principal amount of debt instrument | € |  |  |  |  | € 445 |  |
Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Scheduled maturities of long-term debt in 2022 | $ 0 |  | $ 0 |  |  |  |
Scheduled maturities of long-term debt in 2023 | 0 |  | 0 |  |  |  |
Scheduled maturities of long-term debt in 2024 | 0 |  | 0 |  |  |  |
Scheduled maturities of long-term debt in 2025 | 0 |  | 0 |  |  |  |
Scheduled maturities of long-term debt, 2026 | 0 |  | 0 |  |  |  |
Scheduled maturities of long-term debt, 2027 | 360,000,000 |  | 360,000,000 |  |  |  |
Scheduled maturities of long-term debt, thereafter | $ 2,368,000,000 |  | $ 2,368,000,000 |  |  |  |
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, covenant, total indebtedness to EBITDA ratio | 3.50 |  | 3.50 |  | 3.50 |  |

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