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Performance B.7. Earnings per share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Basic and Diluted      
Net profit (loss) attributable to equity holders from continuing operations $ 1,316 $ 256 $ (86)
Net profit (loss) attributable to equity holders from discontinued operations 0 (3) 4
Net profit attributable to all equity holders to determine the profit per share 1,316 253 (82)
Net profit (loss) attributable to equity holders from continuing operations 1,316 256 (86)
Net profit (loss) attributable to equity holders from discontinued operations 0 (3) 4
Net profit attributable to all equity holders to determine the profit per share $ 1,316 $ 253 $ (82)
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]      
Weighted average number of ordinary shares for basic and diluted earnings per share (in shares) 167,563 171,313 171,397
Effect of dilutive share-based compensation plans (in shares) 437 1,247 0
Weighted average number of ordinary shares (excluding treasury shares) adjusted for the effect of dilution (in shares) 168,000 172,560 171,397
Basic      
Earnings per common share for profit from continuing operations attributable to owners of the Company (in dollars per share) $ 7.86 $ 1.49 $ (0.50)
Earnings per common share for profit from discontinued operations attributable to owners of the Company (in dollars per share) 0 (0.02) 0.02
Earnings (loss) per common share for profit (loss) for the period attributable to owners of the Company (in dollars per share) 7.86 1.47 (0.48)
Diluted      
Earnings per common share for profit from continuing operations attributable to owners of the Company (in dollars per share) 7.83 1.48 (0.50)
Earnings per common share for profit from discontinued operations attributable to owners of the Company (in dollars per share) 0 (0.02) 0.02
Earnings (loss) per common share for profit (loss) for the period attributable to owners of the Company (in dollars per share) $ 7.83 $ 1.46 $ (0.48)
Number of instruments that are antidilutive in period presented (in shares)   1,433