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Property, plant and equipment - Summary of right-of-use assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [Line Items]    
Net book value, beginning of period $ 1,178 $ 1,003
Adjustment on currency translation (61) 15
Additions 570 516
Depreciation for the year (478) (393)
Net impairment reversal/(charges) 5 (8)
Disposals 0 (1)
Transfers and other movements 14 46
Net book value, end of period 1,228 1,178
Land and buildings    
Disclosure of detailed information about property, plant and equipment [Line Items]    
Net book value, beginning of period 543 515
Adjustment on currency translation (37) 11
Additions 150 96
Depreciation for the year (125) (88)
Net impairment reversal/(charges) 0 (1)
Disposals 0 0
Transfers and other movements (7) 10
Net book value, end of period 524 543
Plant and equipment    
Disclosure of detailed information about property, plant and equipment [Line Items]    
Net book value, beginning of period 635 488
Adjustment on currency translation (24) 4
Additions 420 420
Depreciation for the year (353) (305)
Net impairment reversal/(charges) 5 (7)
Disposals 0 (1)
Transfers and other movements 21 36
Net book value, end of period $ 704 $ 635