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Investments - Schedule of Unrealized Net Capital Gains and Losses Included in AOCI (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair value |  |
Fixed income securities, at fair value | $ 50,777 | $ 48,865
Short-term investments | 4,318 | 5,144
Derivative instruments | 0 | 0
Gross Unrealized Gains |  |
Fixed income securities | 408 | 650
Short-term investments | 0 | 0
Derivative instruments | 0 | 0
Gross Unrealized Losses |  |
Fixed income securities | (1,468) | (1,434)
Short-term investments | (2) | (1)
Derivative instruments | (2) | (2)
Unrealized net gains (losses) |  |
Fixed income securities | (1,060) | (784)
Short-term investments | (2) | (1)
Derivative instruments | (2) | (2)
Limited partnership interests | 0 | (4)
Unrealized net capital gains and losses, pre-tax | (1,064) | (791)
Amounts recognized for: |  |
Reclassification of noncontrolling interest | 12 | 13
Deferred income taxes | 233 | 174
Unrealized net capital gains and losses, after-tax | $ (819) | $ (604)

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