Loans and Leases - Information Regarding Troubled Debt Restructurings (Details) - Non-Covered Loans - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	$ 44	$ 29
Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	16	16
Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	28	13
Multi-Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	6	7
Multi-Family | Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	6	7
Commercial Real Estate
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	35	16
Commercial Real Estate | Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	16	16
Commercial Real Estate | Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	19
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	3	6
Commercial and Industrial | Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	$ 3	$ 6