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Loans and Leases - Information Regarding Troubled Debt Restructurings (Details) - Non-Covered Loans - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | $ 29 | $ 34
Accruing |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 16 | 15
Non-Accrual |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 13 | 19
Multi-Family |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 7 |
Multi-Family | Non-Accrual |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 7 |
Commercial Real Estate |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 16 | 15
Commercial Real Estate | Accruing |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 16 | 15
Commercial and Industrial |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | 6 | 19
Commercial and Industrial | Non-Accrual |  |
Financing Receivable Modifications [Line Items] |  |
Troubled debt restructurings | $ 6 | $ 19

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