Revenue Recognition - Summary of Asset Balances and Related Amortization Expense For Contract Costs (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Costs to Obtain a Contract [Member]
Capitalized Contract Cost [Line Items]
Beginning Balance	$ 441.4	$ 396.9	$ 425.7	$ 378.5
Capitalization of Costs	21.4	15.8	54.7	49.7
Amortization	(18.1)	(15.8)	(35.7)	(31.2)
Ending Balance	444.7	397.0	444.7	397.0
Costs to Fulfill a Contract [Member]
Capitalized Contract Cost [Line Items]
Beginning Balance	514.6	440.4	498.3	420.0
Capitalization of Costs	32.5	35.3	67.3	70.9
Amortization	(19.4)	(16.0)	(37.9)	(31.2)
Ending Balance	$ 527.7	$ 459.7	$ 527.7	$ 459.7