Fair Value Measurements - Carrying Amounts, Estimated Fair Values and Valuation Input Levels of the Company's Debt Instruments, Interest Rate Derivatives and Foreign Currency Contracts (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Foreign currency contracts	$ 8.9	$ 6.5
Carrying Amount [Member] | Assets [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Foreign currency contracts	3.6	9.9
Interest rate swap contracts	0.0	8.6
Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Foreign currency contracts	8.9	6.5
Fair Value [Member] | Assets [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Foreign currency contracts	3.6	9.9
Interest rate swap contracts	0.0	8.6
7.125% Senior Notes Due 2028 [Member] | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	696.9	700.0
7.125% Senior Notes Due 2028 [Member] | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	494.8	502.6
5.00% Senior Notes Due 2027 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	750.0	750.0
5.00% Senior Notes Due 2027 [Member] | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	750.0	750.0
5.00% Senior Notes Due 2027 [Member] | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	521.3	513.4
8.25% Senior Notes Due 2027 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	943.1	1,000.0
8.25% Senior Notes Due 2027 [Member] | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	943.1	1,000.0
8.25% Senior Notes Due 2027 [Member] | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	751.2	780.8
6.00% Senior Notes Due 2025 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	1,274.6	1,300.0
6.00% Senior Notes Due 2025 [Member] | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	1,274.6	1,300.0
6.00% Senior Notes Due 2025 [Member] | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	1,185.1	1,183.4
4.75% Senior Secured Notes Due 2029 [Member] | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior secured notes	1,250.0	1,250.0
4.75% Senior Secured Notes Due 2029 [Member] | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	975.0	1,000.0
6.00% Senior Secured Notes Due 2026 [Member] | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior secured notes	1,500.0	1,500.0
6.00% Senior Secured Notes Due 2026 [Member] | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	1,398.8	1,383.3
Senior Secured Term Loan Due 2026 (Member) | Carrying Amount [Member] | Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior secured notes	3,080.0	3,096.0
Senior Secured Term Loan Due 2026 (Member) | Fair Value [Member] | Liabilities [Member] | Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior notes	$ 2,964.5	$ 2,925.7