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Variable Interest Entities - Schedule of Investments, Proportional Amortization Method (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |
Proportional amortization | $ 95,000,000 | $ 59,000,000 | $ 114,000,000 | $ 106,000,000
Tax credits and other benefits | (114,000,000) | (72,000,000) | (137,000,000) | (128,000,000)
Changes in carrying amounts of equity method investments | 2,000,000 | 2,000,000 | 4,000,000 | 4,000,000
Impairment losses | $ 0 | $ 0 | $ 0 | $ 0

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