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Basis of Presentation and Summary of Significant Accounting Policies - Comprehensive Earnings (Loss) - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
COMPREHENSIVE EARNINGS (LOSS) |  |  |  |
Tax rate used (as a percent) | 21.00% | 21.00% | 21.00% | 21.00%
Other comprehensive earnings (loss), tax (benefit) | $ 7 | $ 21 | $ 20 | $ 16
Unrealized gains (loss), net of tax, recognized in other comprehensive earnings (loss) |  |  | $ 76 | $ (60)

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