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Performance B.4.1. Share-based compensation - Cost of share based compensation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Cost of share based compensation | $ (14) | $ (50) | $ (52)
2021 incentive plans |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Cost of share based compensation | 0 | 0 | (10)
2022 incentive plans |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Cost of share based compensation | 0 | (5) | (10)
2023 incentive plans |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Cost of share based compensation | (4) | (23) | (32)
2024 incentive plans |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Cost of share based compensation | (5) | (22) | 0
2025 incentive plans |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Cost of share based compensation | $ (5) | $ 0 | $ 0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Expense From Share-Based Payment Transactions, Excluding Disposals + References No definition available. + Details
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