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Acquisitions and Disposals of Subsidiaries - Summary of Impact of Acquisitions and Disposals on Consolidated Statements (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Non-current liabilities      
Trade and other payables   $ (1,008) $ (1,522)
Current liabilities      
Consideration paid/(received) $ 10,838    
Acquisitions [member]      
Non-current assets      
Property, plant and equipment   2 149
Intangible assets   0 162
Investments in associates   0 (7)
Current assets      
Inventories   0 33
Trade and other receivables   1 9
Cash and cash equivalents   5 5
Non-current liabilities      
Interest-bearing loans and borrowings   0 (74)
Trade and other payables   0 (34)
Deferred tax liabilities   0 (6)
Current liabilities      
Interest-bearing loans and borrowings   0 (4)
Trade and other payables   (5) (59)
Net identifiable assets and liabilities   3 174
Non-controlling interest     0
Goodwill on acquisitions and goodwill disposed of   0 185
Consideration to be (paid)/received   0 (14)
Net cash paid/(received) on prior years acquisitions/(disposals)   453 170
Consideration paid/(received)   456 515
Cash (acquired)/disposed of   (5) (5)
Net cash outflow / (inflow)   451 510
Disposals [member]      
Non-current assets      
Property, plant and equipment   (5) 0
Intangible assets     0
Current assets      
Inventories   (7) 0
Trade and other receivables   (6) 0
Cash and cash equivalents   (5)  
Non-current liabilities      
Deferred tax liabilities     0
Current liabilities      
Trade and other payables   10 0
Net identifiable assets and liabilities   (13) 0
Non-controlling interest     0
Goodwill on acquisitions and goodwill disposed of     0
Loss/(gain) on disposal   1 0
Net cash paid/(received) on prior years acquisitions/(disposals)     0
Consideration paid/(received)   (12) 0
Cash (acquired)/disposed of   5 0
Net cash outflow / (inflow)   $ (7) $ 0