Total Equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Preferred Stock Dividends
Preferred stock dividends declared	$ 124	$ 138
Dividends declared per common share (USD per share)	$ 0.70	$ 0.35
Common stock dividends	$ 1,252	$ 635
Series A
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 242	$ 250
Preferred stock dividends declared	$ 11	$ 11
Series C
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 25	$ 25
Preferred stock dividends declared	$ 13	$ 13
Series E
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 445	$ 445
Preferred stock dividends declared	$ 15	$ 15
Series F
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 430	$ 430
Preferred stock dividends declared	$ 14	$ 14
Series H
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 0	$ 241
Preferred stock dividends declared	$ 0	$ 13
Series I
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 398	$ 398
Preferred stock dividends declared	$ 16	$ 16
Series J
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 0	$ 253
Preferred stock dividends declared	$ 0	$ 15
Series K
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 366	$ 366
Preferred stock dividends declared	$ 15	$ 15
Series L
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 305	$ 305
Preferred stock dividends declared	$ 6	$ 6
Series M
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 29	$ 29
Preferred stock dividends declared	$ 12	$ 12
Series N
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 2,650	$ 2,650
Preferred stock dividends declared	$ 8	$ 8
Series O
Preferred Stock Dividends
Preferred stock dividend declared (USD per share)	$ 266	$ 0
Preferred stock dividends declared	$ 14	$ 0