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Debt - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) subsidiaryBusinessTrust class
Debt Instrument [Line Items] |
Number of classes of financial instruments | class | 2
Number of business subsidiary trusts | subsidiaryBusinessTrust | 2
Federal Reserve Bank of New York |
Debt Instrument [Line Items] |
Collateral, at carrying cost | $ 939
Collateral, at fair value | 890
Federal Home Loan Bank of New York |
Debt Instrument [Line Items] |
Collateral, at carrying cost | 899
Collateral, at fair value | 800
Interest Rate Swap |
Debt Instrument [Line Items] |
Amount of hedged item | $ 20
ACST III | London Interbank Offered Rate (LIBOR) |
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 (LIBOR) |
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%

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- Definition The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5086-111524 + Details
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