Organization and Summary of Accounting Policies - Schedule of Non-Controlling Interests - Redeemable (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Non-Controlling Interests - Redeemable [Roll Forward]
Balance at beginning of period	$ 321.0	$ 326.6
Net income attributable to non-controlling interests—redeemable	19.3	24.1
Acquisition and disposal of shares of non-controlling interests, net—redeemable	(7.9)	(7.8)
Distributions to non-controlling interest—redeemable holders	(27.7)	(28.4)
Balance at end of period	$ 304.7	$ 314.5