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Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Variable Interest Entity [Line Items] |  |  |  |  |
Other comprehensive income (loss), net of tax | $ (86) | $ (418) | $ 644 | $ (893) |
Other investments | 6,611 |  | 6,611 |  | $ 6,588
Variable Interest Entity, Primary Beneficiary |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Other comprehensive income (loss), net of tax | 0 | $ 0 | 0 | $ 0 |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Other investments | $ 5,600 |  | $ 5,600 |  | $ 5,300

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