Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Provision for/(benefit from) income taxes	$ 227.0	$ 209.0	$ 177.0	$ (1,017.0)
Other (income) and expense
Noncontrolling interest amounts, net of tax	$ 6.5	$ 6.8	$ 14.1	$ 11.3