Shareholders' Equity - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Class of Stock [Line Items]
Preferred stock cash dividend	$ 58	$ 46
Series G Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,338	$ 1,338
Preferred stock cash dividend	$ 7	$ 7
Series G Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0.33	$ 0.33
Series I Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,675	$ 1,675
Preferred stock cash dividend	$ 25	$ 25
Series I Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 16.75	$ 16.75
Series J Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,675	$ 1,675
Preferred stock cash dividend	$ 14	$ 14
Series J Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 16.75	$ 16.75
Series K Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,613	$ 0
Preferred stock cash dividend	$ 12	$ 0
Series K Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 16.13	$ 0