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Assets Classified as Held for Sale, Liabilities Associated With Assets Held for Sale and Discontinued Operations - Additional Information (Detail)
$ in Millions, $ in Billions
 12 Months Ended
Jun. 01, 2020
USD ($)
Jun. 01, 2020
AUD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
 [1]
Disclosure of Assets Classified as Held for Sale and Discontinued Operations [line items]          
Sale of Subsidiary company     $ 7   $ 133
Disposal of net Asset     11 $ 210  
Derecognisition of net asset     (33) (9,665)  
Effect of movements in foreign exchange     $ (2) $ (484)  
Gain on disposal of asset $ 1,919        
Australia [member]          
Disclosure of Assets Classified as Held for Sale and Discontinued Operations [line items]          
Disposal of net Asset 10,800        
Derecognisition of net asset (8,500)        
Effect of movements in foreign exchange (400)        
Gain on disposal of asset $ 1,900        
Asahi [Member]          
Disclosure of Assets Classified as Held for Sale and Discontinued Operations [line items]          
Sale of Subsidiary company   $ 16.0      
[1] The consolidated statement of cash flows for 2019 has been restated to include operating, investing and financing activities from discontinued operations separately in the cashflow statement. In addition, the 2019 cash flow from investing activities has been restated to reflect reclassification of the cash flow hedges in relation to the Australia divestiture reported in the financing activities in 2019 and recycled to profit or loss upon the completion of the transaction.