Organization and Summary of Accounting Policies - Schedule of Non-Controlling Interests - Redeemable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Non-Controlling Interests - Redeemable [Roll Forward]
Non-controlling interest, beginning balance	$ 321.0	$ 326.6
Net income attributable to non-controlling interests—redeemable	31.7	39.1
Acquisition and disposal of shares of non-controlling interests, net—redeemable	(9.4)	(4.7)
Distributions to non-controlling interest —redeemable holders	(36.5)	(40.0)
Non-controlling interest, ending balance	$ 306.8	$ 321.0