Income Taxes - Valuation Allowance (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Movement in valuation allowances and reserves | |||
| Valuation allowance at beginning of period | $ 1,037 | $ 726 | $ 542 |
| Change in deferred tax asset positions | 260 | 311 | 184 |
| Valuation allowance at end of period | $ 1,297 | $ 1,037 | $ 726 |