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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, 2023 | Dec. 31, 2022
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance - Recorded Investment | $ 203 | $ 125
Nonaccrual loans with no related allowance - Interest Income Recognized | 1 | 1
Nonaccrual loans with an allowance recorded - Recorded Investment | 30 | 16
Total Nonaccrual, Related Allowance | 18 | 14
Nonaccrual loans with an allowance recorded - Interest Income Recognized | 0 | 0
Total nonaccrual loans - Recorded Investment | 233 | 141
Total nonaccrual loans - Interest Income Recognized | 1 | 1
Mortgage | Multi-family |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance - Recorded Investment | 32 | 13
Nonaccrual loans with no related allowance - Interest Income Recognized | 0 | 0
Nonaccrual loans with an allowance recorded - Recorded Investment | 1 |
Total Nonaccrual, Related Allowance | 0 | 0
Nonaccrual loans with an allowance recorded - Interest Income Recognized | 0 |
Total nonaccrual loans - Recorded Investment | 33 | 13
Total nonaccrual loans - Interest Income Recognized | 0 | 0
Mortgage | Commercial real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance - Recorded Investment | 34 | 19
Nonaccrual loans with no related allowance - Interest Income Recognized | 1 | 1
Nonaccrual loans with an allowance recorded - Recorded Investment | 2 | 1
Total Nonaccrual, Related Allowance | 0 | 0
Nonaccrual loans with an allowance recorded - Interest Income Recognized | 0 | 0
Total nonaccrual loans - Recorded Investment | 36 | 20
Total nonaccrual loans - Interest Income Recognized | 1 | 1
Mortgage | One-to-four family first mortgage |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance - Recorded Investment | 78 | 90
Nonaccrual loans with no related allowance - Interest Income Recognized | 0 | 0
Nonaccrual loans with an allowance recorded - Recorded Investment | 7 | 2
Total Nonaccrual, Related Allowance | 3 | 0
Nonaccrual loans with an allowance recorded - Interest Income Recognized | 0 | 0
Total nonaccrual loans - Recorded Investment | 85 | 92
Total nonaccrual loans - Interest Income Recognized | 0 | 0
Other (includes C&I) |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance - Recorded Investment | 59 | 3
Nonaccrual loans with no related allowance - Interest Income Recognized | 0 | 0
Nonaccrual loans with an allowance recorded - Recorded Investment | 20 | 13
Total Nonaccrual, Related Allowance | 15 | 14
Nonaccrual loans with an allowance recorded - Interest Income Recognized | 0 | 0
Total nonaccrual loans - Recorded Investment | 79 | 16
Total nonaccrual loans - Interest Income Recognized | $ 0 | $ 0

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