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Fair Value - Changes in Level 3 Financial Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Net realized and unrealized capital gains (losses): |  |
Change in unrealized capital losses included in OCI associated with Level 3 financial assets | $ 9 | $ 4
Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 111 | 84
Net realized and unrealized capital gains (losses): |  |
Included in earnings | (9) | 5
Included in other comprehensive income (loss) | (9) | (4)
Purchases | 95 | 17
Sales | (30) | (5)
Settlements | 0 | (1)
Transfers into (out of) Level 3, net | (29) | 15
Ending balance | 129 | 111
States, municipalities and political subdivisions | Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 5 | 1
Net realized and unrealized capital gains (losses): |  |
Included in earnings | 0 | 0
Included in other comprehensive income (loss) | 0 | 0
Purchases | 0 | 0
Sales | (5) | (1)
Settlements | 0 | 0
Transfers into (out of) Level 3, net | 0 | 5
Ending balance | 0 | 5
U.S. corporate securities | Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 38 | 52
Net realized and unrealized capital gains (losses): |  |
Included in earnings | (8) | (10)
Included in other comprehensive income (loss) | (5) | (3)
Purchases | 36 | 1
Sales | 0 | (1)
Settlements | 0 | (1)
Transfers into (out of) Level 3, net | 0 | 0
Ending balance | 61 | 38
Foreign securities | Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 10 | 0
Net realized and unrealized capital gains (losses): |  |
Included in earnings | 0 | 0
Included in other comprehensive income (loss) | (2) | 0
Purchases | 0 | 0
Sales | 0 | 0
Settlements | 0 | 0
Transfers into (out of) Level 3, net | 0 | 10
Ending balance | 8 | 10
Other asset-backed securities | Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 3 | 0
Net realized and unrealized capital gains (losses): |  |
Included in earnings | 0 | 0
Included in other comprehensive income (loss) | (2) | 0
Purchases | 30 | 3
Sales | (2) | 0
Settlements | 0 | 0
Transfers into (out of) Level 3, net | (29) | 0
Ending balance | 0 | 3
Redeemable preferred securities | Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 0 | 1
Net realized and unrealized capital gains (losses): |  |
Included in earnings |  | 2
Included in other comprehensive income (loss) |  | (1)
Purchases |  | 0
Sales |  | (2)
Settlements |  | 0
Transfers into (out of) Level 3, net |  | 0
Ending balance |  | 0
Equity securities | Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 55 | 30
Net realized and unrealized capital gains (losses): |  |
Included in earnings | (1) | 13
Included in other comprehensive income (loss) | 0 | 0
Purchases | 29 | 13
Sales | (23) | (1)
Settlements | 0 | 0
Transfers into (out of) Level 3, net | 0 | 0
Ending balance | $ 60 | $ 55

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- Definition Fair Value, Assets Measured On Recurring Basis, Unobservable Unput Reconciliation, Net Realized And Unrealized Capital Gaines (Losses) [Abstract] + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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