Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Provision for/(benefit from) income taxes	$ (51.0)	$ (1,226.0)
Other (income) and expense
Noncontrolling interest amounts, net of tax	$ 7.6	$ 4.5