Asset retirement obligations - Schedule of Asset Retirement Obligation Costs (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2026 |
Mar. 31, 2025 |
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| Asset Retirement Obligation Disclosure [Abstract] | ||
| Accretion | $ 3 | $ 3 |
| Depreciation | 6 | 5 |
| Total costs | $ 9 | $ 8 |
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- Definition Asset Retirement Obligation Costs No definition available.
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- Definition Asset Retirement Obligation, Depreciation No definition available.
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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