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Income Taxes - Income taxes paid (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items] |  |  |
Federal Bermuda taxes paid | $ 131 |  |
Foreign taxes paid | 327 |  |
Total | 458 | $ 378 | $ 267
United States - federal |  |  |
Income Tax Paid, by Individual Jurisdiction [Line Items] |  |  |
Foreign taxes paid | 227 |  |
United States - other |  |  |
Income Tax Paid, by Individual Jurisdiction [Line Items] |  |  |
Foreign taxes paid | 19 |  |
Australia |  |  |
Income Tax Paid, by Individual Jurisdiction [Line Items] |  |  |
Foreign taxes paid | 26 |  |
Other |  |  |
Income Tax Paid, by Individual Jurisdiction [Line Items] |  |  |
Foreign taxes paid | $ 55 |  |

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