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Subsequent Events - Additional Information (Detail) - USD ($) | Jan. 29, 2021 | Jan. 19, 2021 | Jan. 05, 2021
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Tranche B-4 Facilities [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Repayments of debt |  | $ 767,900,000 | $ 105,000,000.0
Term Loan A- Facility [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Repayments of debt |  | 311,700,000 |
Subsequent Event [Member] | Redemption of 5.265% Senior Notes [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Senior Notes | $ 650,000,000 |  |
Debt instrument interest rate | 5.265% |  |
Subsequent Event [Member] | Redemption of 6.500% Senior Notes [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Senior Notes | $ 390,000,000 |  |
Debt instrument interest rate | 6.50% |  |
Subsequent Event [Member] | Redemption of 5.265% Senior Notes and 6.500% Senior Notes [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Debt instrument, redemption date | Jan. 29, 2021 |  |
Senior Notes | $ 1,040,000,000 |  |
Payment of breakage costs | 6,000,000 |  |
Estimated transaction costs | 9,000,000 |  |
Debt instrument funded from cash | 430,000,000 |  |
Proceeds from new senior secured credit facility | $ 625,000,000 |  |
Debt instrument term | 5 years |  |
Discontinued Operations [Member] | U.K. Sales [Member] | Subsequent Event [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Gross proceeds from sale of business |  | 1,525,000,000 |
Cash retained by buyer |  | 75,000,000 |
Transaction costs |  | 16,000,000 |
Settlement of existing foreign currency hedging liabilities |  | 85,000,000 |
Net proceeds from sale of business |  | 1,425,000,000 |
Net proceeds from sale of business, after deducting cash retained by buyer |  | 1,350,000,000 |
Cash |  | 345,000,000 |
Discontinued Operations [Member] | U.K. Sales [Member] | Subsequent Event [Member] | Tranche B-4 Facilities [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Repayments of debt |  | 768,000,000 |
Discontinued Operations [Member] | U.K. Sales [Member] | Subsequent Event [Member] | Term Loan A- Facility [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Repayments of debt |  | $ 312,000,000 |

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