Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Provision for/(benefit from) income taxes	$ 209.0		$ 269.0	$ (1,017.0)	$ 558.0
Deferred tax asset from intra-entity sale		$ 3,442.0
Net one-time benefit		$ 939.0
Other (income) and expense
Noncontrolling interest amounts, net of tax	$ 6.8		$ 4.9	$ 11.3	$ 11.9