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Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 20 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) $ / shares | Mar. 31, 2023 USD ($) $ / shares | Dec. 31, 2023 USD ($) shares | Sep. 15, 2025 USD ($) | Sep. 15, 2024 USD ($) | Apr. 20, 2022 USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Preferred stock dividends | $ 25 | $ 24 |  |  |  |
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum | 0.025 |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 2,500
Stock Repurchased During Period, Value |  |  | $ 369 |  |  |
Cash dividend declared (in dollars per share) | $ / shares | $ 0.24 | $ 0.20 |  |  |  |
Stock Repurchased During Period, Shares | shares |  |  | 23 |  |  |
Series B Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  | $ 67 |
PreferredDividendsReductiontoRetainedEarningsatRedemption |  |  |  |  | 52 |
Series C Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  | $ 10 |
Series D Preferred Stock | Subsequent Event [Member] |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  | $ 4 |  |
Series E Preferred Stock | Subsequent Event [Member] |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  | $ 10 |  |
us-gaap_SeriesAandBandCPreferredStockMember |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Preferred stock dividends | $ 25 | $ 24 |  |  |  |

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