Property and Equipment - Schedule of Property and Equipment and Accumulated Depreciation and Amortization (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property and Equipment [Line Items]
Property and equipment, gross	$ 1,086.6	$ 809.7
Less: accumulated depreciation and amortization	(576.4)	(437.3)
Software And Capitalized Software Development Costs [Member]
Property and Equipment [Line Items]
Property and equipment, gross	497.2	371.7
Buildings [Member]
Property and Equipment [Line Items]
Property and equipment, gross	275.6	179.9
Computer Equipment [Member]
Property and Equipment [Line Items]
Property and equipment, gross	203.2	164.9
Rental Clocks [Member]
Property and Equipment [Line Items]
Property and equipment, gross	48.0	42.4
Furniture, Fixtures and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment, gross	41.9	32.4
Other [Member]
Property and Equipment [Line Items]
Property and equipment, gross	20.7	18.4
Property and Equipment, net, Excluding Land and Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	510.2	372.4
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	14.7	92.0
Land [Member]
Property and Equipment [Line Items]
Property and equipment, net	36.5	33.8
Property and Equipment, net, Including Land and Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	$ 561.4	$ 498.2