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EMPLOYEE BENEFIT PLANS - Investments Measured at NAV (Details) - NAV - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 11,417 | $ 12,329
Hedge funds and hedge fund-related strategies |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 6,175 | $ 6,730
Hedge funds and hedge fund-related strategies | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 7 days | 2 days
Hedge funds and hedge fund-related strategies | Maximum |  |
Investments measured at NAV |  |
Redemption notice period | 180 days | 180 days
Commingled funds, private equity and private equity-related instruments |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 2,379 | $ 2,266
Unfunded commitments | $ 1,300 |
Commingled funds, private equity and private equity-related instruments | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 0 days | 2 days
Commingled funds, private equity and private equity-related instruments | Maximum |  |
Investments measured at NAV |  |
Redemption notice period | 45 days | 45 days
Fixed income and fixed income-related instruments |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 1,147 | $ 1,003
Unfunded commitments | $ 296 |
Fixed income and fixed income-related instruments | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 1 day | 1 day
Fixed income and fixed income-related instruments | Maximum |  |
Investments measured at NAV |  |
Redemption notice period | 180 days | 180 days
Real assets |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 893 | $ 819
Unfunded commitments | 584 |
Other |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 823 | $ 1,511
Other | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 2 days | 2 days
Other | Maximum |  |
Investments measured at NAV |  |
Redemption notice period | 10 days | 10 days

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- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 54B -Publisher FASB -URI https://asc.fasb.org//1943274/2147482134/820-10-35-54B Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
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- Definition Notice period the entity is required to deliver before it can redeem an investment calculated using net asset value per share, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, investments calculated by per unit, per membership interest, other equity or ownership interest and alternative investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
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