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EMPLOYEE BENEFIT PLANS - Investments Measured at NAV (Details) - NAV - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 12,329 | $ 12,653
Hedge funds and hedge fund-related strategies |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 6,730 | $ 7,563
Hedge funds and hedge fund-related strategies | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 2 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 | $ 2,266 | $ 2,228
Unfunded commitments | $ 1,200 |
Commingled funds, private equity and private equity-related instruments | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 2 days | 3 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 | $ 1,003 | $ 877
Unfunded commitments | $ 364 |
Fixed income and fixed income-related instruments | Minimum |  |
Investments measured at NAV |  |
Redemption notice period | 1 day | 65 days
Fixed income and fixed income-related instruments | Maximum |  |
Investments measured at NAV |  |
Redemption notice period | 180 days | 90 days
Real assets |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 819 | $ 773
Unfunded commitments | 507 |
Other |  |
Investments measured at NAV |  |
Fair value of investment measured at NAV | $ 1,511 | $ 1,212
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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI https://asc.fasb.org/extlink&oid=126972413&loc=SL7495116-110257 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258 + Details
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