CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,500,000,000	3,500,000,000
Common stock, shares issued (in shares)	566,334,746	560,007,579
Common stock, shares outstanding (in shares)	566,334,746	560,007,579
Series A Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	13,800,000	13,800,000
Preferred stock, shares outstanding (in shares)	13,800,000	13,800,000
Series B Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	6,200,000	6,200,000
Preferred stock, shares outstanding (in shares)	6,200,000	6,200,000
Series C Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares issued (in shares)	23,000,000
Preferred stock, shares outstanding (in shares)	23,000,000
Series I Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1	1
Preferred stock, shares issued (in shares)	1	1
Preferred stock, shares outstanding (in shares)	1	1
Series II Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	499,999,999	499,999,999
Preferred stock, shares issued (in shares)	278,781,478	290,381,345
Preferred stock, shares outstanding (in shares)	278,781,478	290,381,345