Segment Information - Schedule of Other Selected Segment Financial Information and Supplemental Geographic and Disaggregated Revenue Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	$ 577.6	$ 586.8	$ 587.2
Capital expenditures	5.7	4.7	12.6
Additions to computer software and other intangibles	208.2	194.7	205.3
Assets	8,755.7	9,135.9
Goodwill	3,409.8	3,445.8	3,431.3
Other intangibles	3,506.8	3,915.9	4,320.1
Other long-lived assets	1,185.8	1,100.7
Total long-lived assets	8,102.4	8,462.4
Deferred income tax	2.9	17.2
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	137.2	114.5	86.4
Capital expenditures	5.5	4.2	12.5
Additions to computer software and other intangibles	169.8	153.9	192.3
Corporate and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	440.4	472.3	500.8
Capital expenditures	0.2	0.5	0.1
Additions to computer software and other intangibles	38.4	40.8	13.0
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	7,315.9	7,643.3
Goodwill	2,929.6	2,929.6
Other intangibles	3,124.3	3,451.5
Other long-lived assets	964.2	891.6
North America | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	111.0	92.6	71.4
Capital expenditures	2.0	2.3	8.5
Additions to computer software and other intangibles	141.2	127.9	161.8
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	1,439.8	1,492.6
Goodwill	480.2	516.2
Other intangibles	382.5	464.4
Other long-lived assets	221.6	209.1
International | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	26.2	21.9	15.0
Capital expenditures	3.5	1.9	4.0
Additions to computer software and other intangibles	$ 28.6	$ 26.0	$ 30.5