Shareholders' Equity - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Class of Stock [Line Items]
Preferred stock cash dividend	$ 21	$ 35	$ 20	$ 20	$ 34	$ 25	$ 76	$ 79
Series D Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,475			$ 1,475			$ 4,425	$ 4,425
Preferred stock cash dividend	$ 11			$ 11			$ 33	$ 33
Series D Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0.37			$ 0.37			$ 1.11	$ 1.11
Series F Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,387			$ 950			$ 3,467	$ 2,869
Preferred stock cash dividend	$ 3			$ 2			$ 9	$ 11
Series F Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 13.87			$ 9.50			$ 34.67	$ 28.69
Series G Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,338			$ 1,338			$ 4,014	$ 4,014,000,000
Preferred stock cash dividend	$ 7			$ 7			$ 20	$ 21
Series G Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0.33			$ 0.33			$ 0.99	$ 0.99
Series H Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)							$ 2,813	$ 2,813
Preferred stock cash dividend							$ 14	$ 14
Series H Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)							$ 28.13	$ 28.13