Total Equity - Preferred Stock Outstanding (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Class of Stock
Preferred stock carrying value	$ 7,750	$ 7,750
Preferred stock shares authorized (shares)	30,000,000
Series A
Class of Stock
Preferred stock shares outstanding (shares)	44,000
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 1,100	1,100
Series C
Class of Stock
Preferred stock shares outstanding (shares)	519,882
Liquidation preference per share (USD per share)	$ 1,000
Preferred stock carrying value	$ 408	408
Series E
Class of Stock
Preferred stock shares outstanding (shares)	34,500
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 862	862
Series F
Class of Stock
Preferred stock shares outstanding (shares)	34,000
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 850	850
Series I
Class of Stock
Preferred stock shares outstanding (shares)	40,000
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 1,000	1,000
Series K
Class of Stock
Preferred stock shares outstanding (shares)	40,000
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 1,000	1,000
Series L
Class of Stock
Preferred stock shares outstanding (shares)	20,000
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 500	500
Series M
Class of Stock
Preferred stock shares outstanding (shares)	400,000
Liquidation preference per share (USD per share)	$ 1,000
Preferred stock carrying value	$ 430	430
Series N
Class of Stock
Preferred stock shares outstanding (shares)	3,000
Liquidation preference per share (USD per share)	$ 100,000
Preferred stock carrying value	$ 300	300
Series O
Class of Stock
Preferred stock shares outstanding (shares)	52,000
Liquidation preference per share (USD per share)	$ 25,000
Preferred stock carrying value	$ 1,300	$ 1,300