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Income taxes (Tables)
9 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
The summary of the income tax expense from operations was:
Three months endedNine months ended
September 30September 30
in $ millions2025202420252024
Total tax expense428531795942
Effective income tax rate22%28%23%25%