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Debt - Narrative (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2024 USD ($) class subsidiaryBusinessTrust
Debt Instrument [Line Items] |
Number of classes of financial instruments | class | 2
Number of business subsidiary trusts | subsidiaryBusinessTrust | 2
Interest Rate Swap |
Debt Instrument [Line Items] |
Amount of hedged item | $ 20
Federal Reserve Bank Advances |
Debt Instrument [Line Items] |
Collateral, at carrying cost | 1,100
Collateral, at fair value | 1,100
Bank Term Funding Program Advance |
Debt Instrument [Line Items] |
Proceeds from short-term debt | $ 100
Weighted average interest rate | 4.76%
ACST III | London Interbank Offered Rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 2.00%
ACST III | Secured Overnight Financing Rate (SOFR) |
Debt Instrument [Line Items] |
Basis spread on variable rate | 2.00%
Junior Subordinated Debt, Preferred Securities | ACST II | London Interbank Offered Rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 3.15%
Junior Subordinated Debt, Preferred Securities | ACST II | Secured Overnight Financing Rate (SOFR) |
Debt Instrument [Line Items] |
Basis spread on variable rate | 3.15%
Federal Home Loan Bank of New York |
Debt Instrument [Line Items] |
Collateral, at carrying cost | $ 875
Collateral, at fair value | $ 737

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