Segment Information - Assets and Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets:	$ 9,135.2			$ 9,471.9
Goodwill:	3,413.9	$ 3,422.4	$ 3,435.7	3,431.3	$ 3,400.8	$ 3,437.1	$ 3,475.4	$ 3,493.3
Other intangibles:	3,998.4	$ 4,113.3	$ 4,218.6	4,320.1	$ 4,395.9	$ 4,541.7	$ 4,689.7	$ 4,824.5
Other long-lived assets:	1,021.9			1,000.6
Total long-lived assets	8,434.2			8,752.0
Deferred income tax	15.4			16.0
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets:	7,646.6			7,919.4
Goodwill:	2,929.6			2,929.6
Other intangibles:	3,539.3			3,805.7
Other long-lived assets:	824.8			809.1
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets:	1,488.6			1,552.5
Goodwill:	484.3			501.7
Other intangibles:	459.1			514.4
Other long-lived assets:	$ 197.1			$ 191.5