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Debt - Schedule of Component of Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Unamortized original issue discount and debt issuance costs	$ (33.5)	$ (35.4)
Debt	7,433.4	7,009.6
Less: current portion of long-term debt	25.0	20.0
Long-term debt	7,408.4	6,989.6
Secured Debt [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Long-term debt gross	4,716.9	4,295.0
Senior Notes [Member] | 5.5% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Long-term debt gross	2,000.0	2,000.0
Senior Notes [Member] | 6.5% Senior Notes due 2032 [Member]
Debt Instrument [Line Items]
Long-term debt gross	$ 750.0	$ 750.0

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