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Shareholders' Equity and Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended					9 Months Ended		41 Months Ended
	Sep. 30, 2025 USD ($) $ / shares	Jun. 30, 2025 USD ($) $ / shares shares	Mar. 31, 2025 $ / shares	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares	Sep. 30, 2024 USD ($) $ / shares	Sep. 30, 2025 USD ($) shares	Apr. 20, 2022 USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Preferred stock dividends	$ (21)	$ (25)		$ (29)	$ (24)	$ (71)	$ (78)
Stock Redeemed or Called During Period, Shares | shares		1,000,000
Stock Redeemed or Called During Period, Value		$ 350		$ 500
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum	0.025					0.025		0.025
Stock Repurchase Program, Authorized Amount									$ 2,500
Stock Repurchased During Period, Shares | shares								61,000,000
Stock Repurchased During Period, Value								$ 1,300
Common Stock, Dividends, Per Share, Increase To Dividend, Declared | $ / shares	$ 0.015
Cash dividend declared (in dollars per share) | $ / shares	$ 0.265	$ 0.25	$ 0.25			$ 0.765	$ 0.73
Series C
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Excess of Redemption Amount Over Carrying Amount	$ 10					$ 10		10
Series D(3)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Stock Redeemed or Called During Period, Shares | shares		3,500
Stock Redeemed or Called During Period, Value		$ 350
Payments of Stock Issuance Costs		$ 4
Excess of Redemption Amount Over Carrying Amount	4					4		4
Series E
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Excess of Redemption Amount Over Carrying Amount	10					10		10
Series F Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Excess of Redemption Amount Over Carrying Amount	$ 11					$ 11		$ 11

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