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Investment Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) $ in Millions | Jun. 30, 2023 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Due within one year | $ 283
Due from one to five years | 795
Due from five to ten years | 1,738
Due after ten years | 4,966
Debt securities, available-for-sale, amortized cost, total | 7,782
Agency - commercial |
Debt Securities, Available-for-sale [Line Items] |
Due within one year | 20
Due from one to five years | 175
Due from five to ten years | 322
Due after ten years | 4,971
Debt securities, available-for-sale, amortized cost, total | 5,488
U.S. Government agency and GSE obligations |
Debt Securities, Available-for-sale [Line Items] |
Due within one year | 247
Due from one to five years | 200
Due from five to ten years | 1,377
Due after ten years | 150
Debt securities, available-for-sale, amortized cost, total | 1,974
US States and Political Subdivisions Debt Securities |
Debt Securities, Available-for-sale [Line Items] |
Due within one year | 0
Due from one to five years | 0
Due from five to ten years | 7
Due after ten years | 0
Debt securities, available-for-sale, amortized cost, total | 7
Other Debt Obligations |
Debt Securities, Available-for-sale [Line Items] |
Due within one year | 20
Due from one to five years | 432
Due from five to ten years | 409
Due after ten years | 367
Debt securities, available-for-sale, amortized cost, total | $ 1,228

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