Allowance for Credit Losses on Loans and Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Valuation Allowance [Line Items]
COVID-19 pandemic, impacts	For the three months ended March 31, 2022, the allowance for credit losses on loan and leases decreased primarily as a result of improvements in macroeconomic and environmental factors surrounding the COVID-19 pandemic, specifically those affecting commercial real estate in the New York City area. The macroeconomic forecast includes Gross Domestic Product (“GDP”) which is expected to rise at an annualized rate of 3.7% and 3.0% respectively for 2022 and 2023. Unemployment continues to subside from the historic shock of 2020, as peak unemployment rates are forecasted to be approximately 3.6% in 2022 and 3.4% in 2023. The 10-year U.S. Treasury yield is expected to steadily increase over the course of 2022-23. In addition to these quantitative inputs, several qualitative factors were considered in decreasing our allowance for loan and lease credit losses, including changes in borrower payment behavior and other attributes related to the commercial real estate portfolio.
Unfunded Loan Commitment [Member]
Valuation Allowance [Line Items]
Allowance for credit losses	$ 11	$ 12