Segment Information - Assets and Goodwill (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020		Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 9,924.9	$ 9,220.3	[1]
Goodwill	3,318.2	2,857.9	[1]	$ 2,848.7	$ 2,841.7
Other intangibles	5,157.7	4,814.8	[1]	$ 5,134.4	$ 5,254.5
Other long-lived assets	760.9	659.1
Total long-lived assets	9,236.8	8,331.8
North America
Segment Reporting Information [Line Items]
Assets	8,121.7	8,522.9
Goodwill	2,745.5	2,745.5
Other intangibles	4,432.0	4,534.5
Other long-lived assets	568.4	562.9
International
Segment Reporting Information [Line Items]
Assets	1,803.2	697.4
Goodwill	572.7	112.4
Other intangibles	725.7	280.3
Other long-lived assets	$ 192.5	$ 96.2

[1] See discussion in Note 1 - Basis of Presentation for further detail regarding the elimination of the International lag reporting.