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Financial assets and liabilities - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Financial assets and liabilities      
Repayments of borrowings $ 229,000,000 $ 83,000,000 $ 110,000,000
Increase (Decrease) in cash, cash equivalents and restricted cash 167,000,000 (112,000,000)  
Foreign exchange gain (loss) 83,000,000 (37,000,000)  
Decrease in lease obligations 34,000,000    
Increase in lease obligations   81,000,000  
Fair value gains on derivative financial instruments 8,000,000    
Fair value losses on derivative financial instruments   21,000,000  
Net increase (decrease) of deferred debt issue costs 3,000,000 (10,000,000)  
Acquisition of borrowings 0 3,000,000  
Proceeds from borrowings 517,000,000 79,000,000 709,000,000
Proceeds from borrowings net of non-cash transactions   94,000,000  
Non Cash Transaction Related To Supplier   15,000,000  
Deferred debt issuance costs net of amortization 31,000,000 28,000,000  
Lease obligations 374,000,000 408,000,000 327,000,000
New or renewed leases 73,000,000 163,000,000  
Principal repayments of leases. 97,000,000 78,000,000 $ 59,000,000
Net borrowings $ 3,902,000,000 $ 3,734,000,000