Segment Information - Assets and Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Feb. 08, 2019	Feb. 07, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Assets	$ 8,985.1		$ 9,112.8
Goodwill	2,848.0	$ 2,850.8	2,840.1	$ 2,792.6	$ 2,797.6	$ 773.5		$ 0.0
Other intangibles	5,022.3	$ 5,143.4	5,251.4	$ 5,361.3	$ 5,488.1		$ 281.1	$ 0.0
Other long-lived assets	610.2		590.8
Total long-lived assets	8,480.5		8,682.3
Increase in goodwill during period	7.9
Decrease in intangible assets during period	229.1
Increase in other long-lived assets during period	19.4
North America
Segment Reporting Information [Line Items]
Assets	8,391.9		8,480.1
Goodwill	2,745.3		2,734.6
Other intangibles	4,747.0		4,953.0
Other long-lived assets	523.4		500.9
Decrease in assets during period	88.2
International
Segment Reporting Information [Line Items]
Assets	593.2		632.7
Goodwill	102.7		105.5
Other intangibles	275.3		298.4
Other long-lived assets	86.8		$ 89.9
Decrease in assets during period	$ 39.5