Debt - Component of Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Unamortized original issue discount and debt issuance costs	$ (37.3)	$ (35.1)
Debt	7,202.7	6,720.0
Less: current portion of long-term debt	47.1	51.5
Long-term debt	7,155.6	6,668.5
Secured Debt \| Senior Secured Credit Facilities
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	4,490.0	4,755.1
Senior Notes \| 5.5% Senior Notes due 2027
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	2,000.0	2,000.0
Senior Notes \| 6.5% senior notes due 2032
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	$ 750.0	$ 0.0

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.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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