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Loans and Leases - TDRs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accruing			$ 16
Non- Accrual			29
Total	$ 188	$ 253	45
Mortgage Loans: | Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accruing			0
Non- Accrual			6
Total	100	100	6
Mortgage Loans: | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accruing			16
Non- Accrual			19
Total	67	119	35
Other Loans: | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accruing			0
Non- Accrual			4
Total	$ 14	21	$ 4
Other Loans: | Taxi medallion-related loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total		$ 4

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- Definition

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- Definition

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- Definition

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+ References

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-Topic 310
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-Name Accounting Standards Codification
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