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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2022
Income Tax Examination [Line Items] |  |  |  |  |
Income tax provision | $ 105 | $ 59 | $ 334 | $ 244 |
Earnings before income taxes | $ 565 | $ 400 | $ 1,637 | $ 1,329 |
Income tax rate reconciliation, percent | 18.60% | 14.80% | 20.40% | 18.40% |
Less: Net earnings attributable to noncontrolling interests | $ 107 | $ 65 | $ 252 | $ 195 |
Effect of ongoing tax audits on income tax expense |  |  | $ 21 |  |
Income tax rate increase/(decrease) during period due to noncontrolling interest | 4.30% | 2.90% | 3.70% | 3.10% |
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent |  |  | 1.30% |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount |  | $ 9 |  |  |
Income Tax Examination, Interest Refund |  | 3 |  |  |
Tax Adjustments, Settlements, and Unusual Provisions |  | 37 |  |  |
Tax Years 2006-2011 | Canada Revenue Agency and Alberta Tax and Revenue Administration | Foreign Tax Jurisdiction |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority |  | 40 |  | $ 40 |
Proceeds from Income Tax Refund, Foreign |  | 37 |  |  |
Income Tax Examination, Interest Refund |  | $ 3 |  |  |
Tax Years 2006-2011 | Canada Revenue Agency | Foreign Tax Jurisdiction |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |
Income Tax Examination, Interest Expense |  |  |  |  | $ 124
Tax Years 2006-2011 | Alberta Tax and Revenue Administration | Foreign Tax Jurisdiction |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |
Income Tax Examination, Interest Expense |  |  |  |  | $ 100

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