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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 | 12 Months Ended | 29 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) $ / shares | Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($) $ / shares | Sep. 30, 2024 USD ($) shares | Sep. 15, 2029 USD ($) | May 15, 2029 USD ($) | Jun. 15, 2026 USD ($) | Sep. 15, 2025 USD ($) | Sep. 15, 2024 USD ($) | Apr. 20, 2022 USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends |  | $ (104) | $ (98) | $ (99) |  |  |  |  |  |  |
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum | 0.025 | 0.025 |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  | $ 2,500
Stock Repurchased During Period, Shares | shares |  |  |  |  | 34 |  |  |  |  |  |
Stock Repurchased During Period, Value |  |  |  |  | $ 614 |  |  |  |  |  |
Cash dividend declared (in dollars per share) | $ / shares |  | $ 0.98 | $ 0.88 | $ 0.74 |  |  |  |  |  |  |
Series B(2) |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
PreferredDividendsReductiontoRetainedEarningsatRedemption |  |  |  |  |  |  |  |  |  | $ 52 |
ExcessofRedemptionAmountOverCarryingAmount | $ 15 | $ 15 |  |  |  |  |  |  |  |  |
Series C | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  |  | $ 10 |  |  |  |
Series D | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  |  |  |  | $ 4 |  |
Series E | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  |  |  | $ 10 |  |  |
Series F Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments of Stock Issuance Costs | 11 |  |  |  |  |  |  |  |  |  |
Preferred stock dividends | $ (13) |  |  |  |  |  |  |  |  |  |
Series F Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  | $ 11 |  |  |  |  |
us-gaap_SeriesBandCandDand EPreferredStockMember |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends |  | $ (91) | $ (98) |  |  |  |  |  |  |  |

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