CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Lower of cost or market adjustment on a portion of unsecured loan portfolio held for sale	$ 56.6	$ 67.0	$ 387.9	$ 239.1