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Debt - Short-term Borrowings Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Commercial mortgage backed securities |  |
Short-term borrowings |  |
FHLB advances, securities pledged as collateral | $ 1,200 | $ 1,200
Residential mortgage backed securities |  |
Short-term borrowings |  |
FHLB advances, securities pledged as collateral | $ 479 | $ 581
Federal Home Loan Bank borrowings |  |
Short-term borrowings |  |
Term, less than | 3 months | 3 months

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- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Details
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- Details
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