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Fair Value Measurements - Investments in Certain Other Invested Assets (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | $ 4,283 | $ 4,345
Private Equity Funds and Hedge Funds |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 3,550 | 3,799
Unfunded Commitments | 959 | 1,081
Private equity funds |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 3,362 | 3,388
Unfunded Commitments | $ 959 | 1,081
Average original expected lives (in years) | 10 years |
Private equity funds | Minimum |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Extension period (in years) | 1 year |
Private equity funds | Maximum |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Extension period (in years) | 2 years |
Leveraged buyout |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | $ 1,212 | 1,171
Unfunded Commitments | 479 | 558
Real assets |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 839 | 870
Unfunded Commitments | 308 | 344
Venture capital |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 77 | 67
Unfunded Commitments | 45 | 50
Growth equity |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 204 | 196
Unfunded Commitments | 13 | 9
Mezzanine |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 129 | 140
Unfunded Commitments | 54 | 56
Other |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 901 | 944
Unfunded Commitments | 60 | 64
Hedge funds |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 188 | 411
Unfunded Commitments | 0 | 0
Event-driven |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 13 | 13
Unfunded Commitments | 0 | 0
Long-short |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 168 | 389
Unfunded Commitments | 0 | 0
Macro |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 0 | 0
Unfunded Commitments | 0 | 0
Other |  |
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE |  |
Fair Value Using NAV Per Share (or its equivalent) | 7 | 9
Unfunded Commitments | $ 0 | $ 0

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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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