Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Redeemable Noncontrolling Interest [Abstract]
Beginning balance as of January 1	$ 19.2	$ 20.9
Other comprehensive income	0.0	0.0
Redemption value adjustment	0.0	(0.3)
Termination of put option	(19.2)	0.0
Balance at March 31	$ 0.0	$ 20.6