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Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Variable Interest Entity [Line Items] |  |  |
Other comprehensive income (loss), net of tax | $ (475) | $ 2,598 |
Other investments | 5,256 |  | $ 5,015
Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Other comprehensive income (loss), net of tax | 0 | $ 0 |
Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Other investments | $ 4,500 |  | $ 4,200

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