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Financial Instruments - Summary of Interest Rate Profile of the Group's Interest-bearing Financial Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of financial instruments by type of interest rate [line items]    
Other investments $ 3,178 $ 1,282
Cash and cash equivalents 4,991 2,173
Bank loans (2,000)  
Fixed-rate instruments [member]    
Disclosure of financial instruments by type of interest rate [line items]    
Other investments 3,178 1,282
Cash and cash equivalents 4,991 2,173
CRPS (liability component) 0 (10,767)
Bank loans (100) (162)
Variable-rate instruments [member]    
Disclosure of financial instruments by type of interest rate [line items]    
Bank loans (38) (50)
Term loan $ (1,914) $ 0