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Contingencies and commitments - (Tables)
 12 Months Ended
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
U.S. repatriation tax commitments The following table summarizes the remaining scheduled repatriation tax payments as of December 31, 2022 (in millions):
Amounts
2023$1,100 
20241,467 
20251,834 
Total remaining U.S. repatriation tax commitments$4,401