Loans and Leases - TDRs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 19	$ 65	$ 45
Accruing			16
Non- Accrual			29
Mortgage Loans: | Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			6
Accruing			0
Non- Accrual			6
Mortgage Loans: | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	8	52	35
Accruing			16
Non- Accrual			19
Other Loans: | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 7	$ 7	4
Accruing			0
Non- Accrual			4
Other Loans: | Taxi medallion-related loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total			$ 4