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Allowance for Credit Losses on Loans and Leases - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
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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

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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
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