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FAIR VALUE - Level 3 Activity (Details) - Market Value - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance fixed maturities | $ 1,725 | $ 2,068
Total gains or (losses) (realized/unrealized) |  |
Included in earnings | 1 | 16
Included in other comprehensive income (loss) | 14 | (33)
Purchases, issuances and settlements | 5 | 74
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories | 0 | 0
Ending balance | 1,745 | 2,125
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date | 0 | 0
Corporate securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance fixed maturities | 715 | 801
Total gains or (losses) (realized/unrealized) |  |
Included in earnings | 1 | 16
Included in other comprehensive income (loss) | (4) | (4)
Purchases, issuances and settlements | (3) | (98)
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories | 0 | 0
Ending balance | 709 | 715
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date | 0 | 0
Asset-backed securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance fixed maturities | 994 | 1,251
Total gains or (losses) (realized/unrealized) |  |
Included in earnings | 0 | 0
Included in other comprehensive income (loss) | 18 | (29)
Purchases, issuances and settlements | 9 | 166
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories | 0 | 0
Ending balance | 1,020 | 1,389
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date | 0 | 0
CMBS |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance fixed maturities |  | 0
Total gains or (losses) (realized/unrealized) |  |
Included in earnings |  | 0
Included in other comprehensive income (loss) |  | 0
Purchases, issuances and settlements |  | 6
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories |  | 0
Ending balance |  | 6
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  | 0
Foreign corporate securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance fixed maturities | 16 | 16
Total gains or (losses) (realized/unrealized) |  |
Included in earnings | 0 | 0
Included in other comprehensive income (loss) | 0 | 0
Purchases, issuances and settlements | 0 | 0
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories | 0 | 0
Ending balance | 16 | 16
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date | $ 0 | $ 0

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings And Other Comprehensive Income + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) recognized in income 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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