Shareholders' Equity - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Class of Stock [Line Items]
Preferred stock cash dividend	$ 42	$ 55	$ 34	$ 24	$ 37	$ 23	$ 131	$ 84
Series D Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0			$ 1,475			$ 1,475	$ 4,425
Preferred stock cash dividend	$ 0			$ 11			$ 11	$ 33
Series D Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0			$ 0.37			$ 0.37	$ 1.11
Series F Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0			$ 2,338			$ 2,336	$ 6,592
Preferred stock cash dividend	$ 0			$ 6			$ 6	$ 17
Series F Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0			$ 23.38			$ 23.36	$ 65.92
Series G Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,338			$ 1,338			$ 4,013	$ 4,013
Preferred stock cash dividend	$ 7			$ 7			$ 20	$ 20
Series G Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0.33			$ 0.33			$ 1.00	$ 1.00
Series H Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 2,036			$ 0			$ 6,251	$ 2,813
Preferred stock cash dividend	$ 10			$ 0			$ 31	$ 14
Series H Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 20.36			$ 0			$ 62.51	$ 28.13
Series I Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 16.75			$ 0			$ 41.88	$ 0
Preferred stock cash dividend	$ 25			$ 0			$ 63	$ 0
Series I Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,675			$ 0			$ 4,188	$ 0