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Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) $ / shares in Units, shares in Thousands | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares | Sep. 15, 2025 USD ($) | Sep. 15, 2024 USD ($) | Apr. 20, 2022 USD ($) | Apr. 21, 2021 USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  | $ 99,000,000 | $ 108,000,000 | $ 103,000,000 |  |  |  |
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum | 0.025 |  | 0.0250 |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  | $ 2,500,000,000 | $ 2,500,000,000
Shares repurchased (in shares) | shares |  | 9,100 | 725 |  |  |  |  |  |
Stock Repurchased During Period, Value | $ 15,000,000 | $ 215,000,000 |  | 20,800,000 |  |  |  |  |
Impact of share repurchase, value |  |  | $ (230,000,000) | $ (467,000,000) |  |  |  |  |
Stock Repurchased during period related to the Company's deferred investment plan for its directors | shares |  |  |  | 1,000 |  |  |  |  |
Cash dividend declared (in dollars per share) | $ / shares |  |  | $ 0.74 | $ 0.65 | $ 0.62 |  |  |  |
Series D Preferred Stock |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  |  | $ 11,000,000 |  |  |  |  |
Series D Preferred Stock | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  | $ 4,000,000 |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  |  | 108,000,000 |  |  |  |  |
us-gaap_SeriesAandBandCPreferredStockMember |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  | $ 81,000,000 | 81,000,000 |  |  |  |  |
Series E Preferred Stock |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  | $ 18,000,000 |  |  |  |  |  |
Series E Preferred Stock | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  | $ 10,000,000 |  |  |
Series B Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  |  | $ 67,000,000 |  |
PreferredDividendsReductiontoRetainedEarningsatRedemption |  |  |  |  |  |  | 52,000,000 |  |
Series C Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
ExcessofRedemptionAmountOverCarryingAmount |  |  |  |  |  |  | $ 10,000,000 |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity And Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  |  | $ 16,000,000 |  |  |  |  |

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