Shareholders' Equity - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Class of Stock [Line Items]
Preferred stock cash dividend	$ 63	$ 46	$ 55	$ 34	$ 109	$ 89
Series D Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)					$ 0	$ 1,475
Preferred stock cash dividend					$ 0	$ 11
Series D Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)					$ 0	$ 0.37
Series F Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)					$ 0	$ 2,336
Preferred stock cash dividend					$ 0	$ 6
Series F Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)					$ 0	$ 23.36
Series G Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,338		$ 1,338		$ 2,675	$ 2,675
Preferred stock cash dividend	$ 6		$ 6		$ 13	$ 13
Series G Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0.33		$ 0.33		$ 0.67	$ 0.67
Series H Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0		$ 2,145		$ 0	$ 4,214
Preferred stock cash dividend	$ 0		$ 11		$ 0	$ 21
Series H Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0		$ 21.45		$ 0	$ 42.14
Series I Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,675		$ 2,513		$ 3,350	$ 2,513
Preferred stock cash dividend	$ 25		$ 38		$ 50	$ 38
Series I Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 16.75		$ 25.13		$ 33.50	$ 25.13
Series J Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,675		$ 0		$ 3,350	$ 0
Preferred stock cash dividend	$ 15		$ 0		$ 29	$ 0
Series J Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 16.75		$ 0		$ 33.50	$ 0
Series K Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 2,311		$ 0		$ 2,311	$ 0
Preferred stock cash dividend	$ 17		$ 0		$ 17	$ 0
Series K Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 23.11		$ 0		$ 23.11	$ 0