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Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 1,498 | $ 1,498
Finite-Lived Intangible Assets, Accumulated Amortization | 1,293 | 1,249
Finite-Lived Intangible Assets, Net | 205 | 249
Core Deposits [Member] |  |
Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 1,011 | 1,011
Finite-Lived Intangible Assets, Accumulated Amortization | 1,010 | 1,006
Finite-Lived Intangible Assets, Net | 1 | 5
Purchased Credit Card Relationships [Member] |  |
Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 175 | 175
Finite-Lived Intangible Assets, Accumulated Amortization | 169 | 164
Finite-Lived Intangible Assets, Net | 6 | 11
Customer-Related Intangible Assets |  |
Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 267 | 267
Finite-Lived Intangible Assets, Accumulated Amortization | 90 | 58
Finite-Lived Intangible Assets, Net | 177 | 209
Other Intangible Assets [Member] |  |
Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 26 | 26
Finite-Lived Intangible Assets, Accumulated Amortization | 24 | 21
Finite-Lived Intangible Assets, Net | 2 | 5
Fannie Mae DUS License [Member] |  |
Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 16 | 16
Finite-Lived Intangible Assets, Accumulated Amortization | 0 | 0
Finite-Lived Intangible Assets, Net | 16 | 16
Other Intangible Assets [Member] |  |
Other Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 3 | 3
Finite-Lived Intangible Assets, Accumulated Amortization | 0 | 0
Finite-Lived Intangible Assets, Net | $ 3 | $ 3

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