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Deferred Tax Assets and Liabilities - Summary of Deferred Tax Assets and Liabilities by Type of Temporary Difference (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Deferred Taxes [line items]      
Assets $ 1,969 $ 2,019  
Liabilities (12,204) (12,627)  
Net (10,235) (10,607) $ (11,105)
Netting by taxable entity, Assets (1,743) (1,771)  
Netting by taxable entity, Liabilities 1,743 1,771  
Net deferred tax assets/(liabilities), Assets 1,969 2,019  
Net deferred tax assets/(liabilities), Liabilities (12,204) (12,627)  
Property, Plant and Equipment [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 91 398  
Liabilities (2,113) (2,487)  
Net (2,023) (2,089)  
Intangibles [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 60 106  
Liabilities (9,796) (10,007)  
Net (9,736) (9,901)  
Inventory [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 88 86  
Liabilities (66) (65)  
Net 22 22  
Trades and Other Receivables [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 48 62  
Net 48 62  
Interest Bearing Loans and Borrowings [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 905 858  
Liabilities (628) (603)  
Net 277 255  
Employee Benefits [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 577 648  
Liabilities (8) (8)  
Net 569 640  
Provisions [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 511 525  
Liabilities (19) (30)  
Net 492 495  
Derivatives [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 11 13  
Liabilities (118) (46)  
Net (107) (33)  
Other Items [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 407 312  
Liabilities (1,198) (1,152)  
Net (792) (840)  
Loss Carry Forwards [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 1,015 782  
Net 1,015 782  
Gross Deferred Tax Assets/(Liabilities) [member]      
Disclosure Of Deferred Taxes [line items]      
Assets 3,713 3,790  
Liabilities (13,947) (14,398)  
Net $ (10,235) $ (10,607)