Shareholders' Equity - Summary of Cash Dividends Declared per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Class of Stock [Line Items]
Common stock	$ 0.52	$ 0.52	$ 1.04	$ 1.04
Dividends, Common Stock, Cash	$ 670	$ 696	$ 1,349	$ 1,390
Dividends, Preferred Stock, Cash	$ 60	$ 77	$ 164	$ 183
Series I
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,286.86	$ 1,598.23	$ 2,588.71	$ 3,159.45
Dividends, Preferred Stock, Cash	$ 2	$ 3	$ 4	$ 5
Series J
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1,315.93	$ 1,628.26	$ 2,646.85	$ 3,218.54
Dividends, Preferred Stock, Cash	$ 2	$ 2	$ 3	$ 3
Series L
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0	$ 2,269.81	$ 0	$ 4,481.17
Dividends, Preferred Stock, Cash	$ 0	$ 16	$ 0	$ 33
Series M
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 2,562.5	$ 2,562.5	$ 2,562.5	$ 2,562.5
Dividends, Preferred Stock, Cash	$ 13	$ 13	$ 13	$ 13
Series N
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0	$ 0	$ 833.63	$ 600.00
Dividends, Preferred Stock, Cash	$ 0	$ 0	$ 56	$ 41
Series O
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 328.13	$ 328.13	$ 656.25	$ 656.25
Dividends, Preferred Stock, Cash	$ 7	$ 7	$ 15	$ 15
Series P
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 618.75	$ 618.75	$ 618.75	$ 618.75
Dividends, Preferred Stock, Cash	$ 25	$ 25	$ 25	$ 25
Series Q
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0	$ 0	$ 637.50	$ 637.50
Dividends, Preferred Stock, Cash	$ 0	$ 0	$ 26	$ 26
Series R
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 296.88	$ 296.88	$ 593.75	$ 593.75
Dividends, Preferred Stock, Cash	$ 11	$ 11	$ 22	$ 22