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Allowance for Credit Losses on Loans and Leases - Schedule of Additional Information about Nonaccrual Loans (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans with no related allowance - Recorded Investment | $ 1,503 | $ 294
Non-accrual loans with no related allowance - Interest Income Recognized | 31 | 7
Non-accrual loans with an allowance recorded - Recorded Investment | 439 | 134
Total Non - accrual loans - Related Allowance | 118 | 47
Non-accrual loans with an allowance recorded - Interest Income Recognized | 10 | 3
Total non-accrual loans - Recorded Investment | 1,942 | 428
Total non-accrual loans - Interest Income Recognized | 41 | 10
Mortgage Loans Held for Investment [Member] | Multi-family |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans with no related allowance - Recorded Investment | 757 | 134
Non-accrual loans with no related allowance - Interest Income Recognized | 13 | 5
Non-accrual loans with an allowance recorded - Recorded Investment | 37 | 4
Total Non - accrual loans - Related Allowance | 7 | 0
Non-accrual loans with an allowance recorded - Interest Income Recognized | 1 | 0
Total non-accrual loans - Recorded Investment | 794 | 138
Total non-accrual loans - Interest Income Recognized | 14 | 5
Mortgage Loans Held for Investment [Member] | Commercial real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans with no related allowance - Recorded Investment | 618 | 53
Non-accrual loans with no related allowance - Interest Income Recognized | 17 | 2
Non-accrual loans with an allowance recorded - Recorded Investment | 135 | 75
Total Non - accrual loans - Related Allowance | 35 | 17
Non-accrual loans with an allowance recorded - Interest Income Recognized | 5 | 3
Total non-accrual loans - Recorded Investment | 753 | 128
Total non-accrual loans - Interest Income Recognized | 22 | 5
Mortgage Loans Held for Investment [Member] | One-to-four family first mortgage |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans with no related allowance - Recorded Investment | 88 | 85
Non-accrual loans with no related allowance - Interest Income Recognized | 0 | 0
Non-accrual loans with an allowance recorded - Recorded Investment | 18 | 11
Total Non - accrual loans - Related Allowance | 1 | 2
Non-accrual loans with an allowance recorded - Interest Income Recognized | 0 | 0
Total non-accrual loans - Recorded Investment | 106 | 96
Total non-accrual loans - Interest Income Recognized | 0 | 0
Mortgage Loans Held for Investment [Member] | Acquisition, development, and construction |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans with no related allowance - Recorded Investment | 15 |
Non-accrual loans with no related allowance - Interest Income Recognized | 1 |
Non-accrual loans with an allowance recorded - Recorded Investment | 3 |
Total Non - accrual loans - Related Allowance | 1 |
Non-accrual loans with an allowance recorded - Interest Income Recognized | 0 |
Total non-accrual loans - Recorded Investment | 18 |
Total non-accrual loans - Interest Income Recognized | 1 |
Other (includes commercial and industrial) |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans with no related allowance - Recorded Investment | 25 | 22
Non-accrual loans with no related allowance - Interest Income Recognized | 0 | 0
Non-accrual loans with an allowance recorded - Recorded Investment | 246 | 44
Total Non - accrual loans - Related Allowance | 74 | 28
Non-accrual loans with an allowance recorded - Interest Income Recognized | 4 | 0
Total non-accrual loans - Recorded Investment | 271 | 66
Total non-accrual loans - Interest Income Recognized | $ 4 | $ 0

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