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Exceptional Items - Summary of Exceptional Items (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cost of sales:      
Derecognition of right-of-use assets and lease liabilities $ 0   $ 22
Gain on lease termination 0   30
Provisions charged to income statement (incl onerous contracts) (54)    
Administrative expenses:      
Administrative expenses (364) $ (300) (267)
Impairment loss on financial assets (5) 0 (88)
Other net impairment reversals/(charges):      
Impairment (Charge)     (4)
Contract assets (Charge) 5    
Contract assets (Reversal) 3 0  
Other impairment charges 5 (4) (226)
Profit/(loss) before tax 540 361 (280)
Financial expenses (118) (147) (144)
Fair value gains on contingent purchase consideration 8 6 13
Tax on exceptional items 26 29 52
Tax 164 96 (20)
Operating exceptional items (95) (29) (270)
Operating exceptional items analysed as:      
Operating exceptional profit before tax 628 494 (153)
Right-of-use assets [member]      
Other net impairment reversals/(charges):      
Impairment (Charge) (5)   (16)
Exceptional items [member]      
Cost of sales:      
Derecognition of right-of-use assets and lease liabilities 0 0 22
Gain on lease termination 0 0 30
Total cost of sales 0 0 34
Administrative expenses:      
Commercial litigation and disputes (28) (25) (5)
Administrative expenses (40) (25) (30)
Share of losses of associate (60)    
Impairment loss on financial assets 0   (48)
Other net impairment reversals/(charges):      
Management agreements (Charge)   0  
Property plant and equipment (Charge) (10) 0 (90)
Impairment (Charge)     (13)
Contract assets (Charge) (5) 0 (53)
Management agreements (Reversal) 12 0 0
Property, plant and equipment (Reversal) 3 0 0
Contract assets (Reversal) 3 0 0
Other impairment charges 5 (4) (226)
Profit/(loss) before tax (95) (29) (263)
Financial expenses 0   (14)
Fair value gains on contingent purchase consideration 0   21
Tax on exceptional items 26 3 52
Exceptional tax 0 26  
Tax 26 29 52
Operating exceptional items analysed as:      
Operating exceptional profit before tax (95) (29) (270)
Exceptional items [member] | Integration costs [member]      
Administrative expenses:      
Integration costs 0   (6)
Exceptional items [member] | Cost of ceasing operations [member]      
Administrative expenses:      
Costs of ceasing operations in Russia (12) 0  
Exceptional items [member] | Cost of Sales [Member]      
Disclosure Of Exceptional Items [line items]      
Reorganisation costs 0 0 (8)
Exceptional items [member] | Administrative Expenses [member]      
Disclosure Of Exceptional Items [line items]      
Reorganisation costs 0   (19)
Exceptional items [member] | Right-of-use assets [member]      
Other net impairment reversals/(charges):      
Impairment (Charge) (2) 0 (16)
Impairment (Reversal) 2 0 0
Exceptional items [member] | Management agreements [member]      
Other net impairment reversals/(charges):      
Management agreements (Charge) 0   (48)
Exceptional items [member] | Onerous Contracts Provisions [Member]      
Cost of sales:      
Provisions charged to income statement (incl onerous contracts) 0 0 (10)
Exceptional items [member] | Associates [member]      
Other net impairment reversals/(charges):      
Impairment (Charge) 0 (4) (19)
Impairment (Reversal) 2 0 0
Operating exceptional items analysed as:      
Operating exceptional profit before tax (42)    
Exceptional items [member] | Americas [member]      
Operating exceptional items analysed as:      
Operating exceptional profit before tax (46) (22) (118)
Exceptional items [member] | EMEAA [member]      
Operating exceptional items analysed as:      
Operating exceptional profit before tax (49) $ (7) (128)
Exceptional items [member] | Greater China [member]      
Operating exceptional items analysed as:      
Operating exceptional profit before tax 0   (5)
Exceptional items [member] | Central [member]      
Operating exceptional items analysed as:      
Operating exceptional profit before tax $ 0   $ (19)