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Investment Securities - Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Unrealized Losses |  |
Fair value, less than 12 months | $ 4,936 | $ 1,400
Unrealized losses, less than 12 months | (90) | (6)
Fair value, 12 months or longer | 522 | 0
Unrealized loss, 12 months or longer | (22) | 0
Fair value, total | 5,458 | 1,400
Unrealized losses, total | (112) | (6)
U.S. treasuries |  |
Unrealized Losses |  |
Fair value, less than 12 months |  | 307
Unrealized losses, less than 12 months |  | 0
Fair value, 12 months or longer |  | 0
Unrealized loss, 12 months or longer |  | 0
Fair value, total |  | 307
Unrealized losses, total |  | 0
Government agency issued MBS |  |
Unrealized Losses |  |
Fair value, less than 12 months | 2,973 | 426
Unrealized losses, less than 12 months | (41) | (2)
Fair value, 12 months or longer | 184 | 0
Unrealized loss, 12 months or longer | (8) | 0
Fair value, total | 3,157 | 426
Unrealized losses, total | (49) | (2)
Government agency issued CMO |  |
Unrealized Losses |  |
Fair value, less than 12 months | 1,436 | 586
Unrealized losses, less than 12 months | (37) | (3)
Fair value, 12 months or longer | 248 | 0
Unrealized loss, 12 months or longer | (10) | 0
Fair value, total | 1,684 | 586
Unrealized losses, total | (47) | (3)
Other U.S. government agencies |  |
Unrealized Losses |  |
Fair value, less than 12 months | 459 | 80
Unrealized losses, less than 12 months | (11) | (1)
Fair value, 12 months or longer | 90 | 0
Unrealized loss, 12 months or longer | (4) | 0
Fair value, total | 549 | 80
Unrealized losses, total | (15) | (1)
States and municipalities |  |
Unrealized Losses |  |
Fair value, less than 12 months | 68 | 1
Unrealized losses, less than 12 months | (1) | 0
Fair value, 12 months or longer | 0 | 0
Unrealized loss, 12 months or longer | 0 | 0
Fair value, total | 68 | 1
Unrealized losses, total | $ (1) | $ 0

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