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v3.24.3

Debt - Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 07, 2024 USD ($) | Sep. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) class subsidiaryBusinessTrust
Debt Instrument [Line Items] |  |  |  |
Repayments of short-term debt |  | $ 5 |  |
Number of classes of financial instruments | class |  |  |  | 2
Number of business subsidiary trusts | subsidiaryBusinessTrust |  |  |  | 2
Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayments of short-term debt | $ 95 |  |  |
Interest Rate Swap |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of hedged item |  | 20 |  | $ 20
Federal Reserve Bank Advances |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral, at carrying cost |  | 1,100 |  | 1,100
Collateral, at fair value |  | $ 1,100 |  | $ 1,100
Bank Term Funding Program Advance |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from short-term debt |  |  | $ 100 |
Weighted average interest rate (in percent) |  | 4.76% |  | 4.76%
ACST III | London Interbank Offered Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (in percent) |  |  |  | 2.00%
ACST III | Secured Overnight Financing Rate (SOFR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (in percent) |  |  |  | 2.00%
Junior Subordinated Debt, Preferred Securities | ACST II | London Interbank Offered Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (in percent) |  |  |  | 3.15%
Junior Subordinated Debt, Preferred Securities | ACST II | Secured Overnight Financing Rate (SOFR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (in percent) |  |  |  | 3.15%
Federal Home Loan Bank of New York |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral, at carrying cost |  | $ 890 |  | $ 890
Collateral, at fair value |  | $ 755 |  | $ 755

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