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Interest-Bearing Loans and Borrowings - Summary of Interest-bearing Loans and Borrowings (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
CURRENT LIABILITIES    
Commercial papers $ 3,100 $ 16,000
Non-Current Liabilities [Member]    
NON-CURRENT LIABILITIES    
Secured bank loans 48 71
Unsecured bank loans 55 50
Unsecured bond issues 104,162 95,674
Unsecured other loans 81 77
Finance lease liabilities 1,688 1,692
Non-current interest-bearing loans and borrowings 106,034 97,564
Current Liabilities [member]    
CURRENT LIABILITIES    
Secured bank loans 995 790
Commercial papers 3,072 1,599
Unsecured bank loans 133 135
Unsecured bond issues 1,916 2,532
Unsecured other loans 16 20
Finance lease liabilities 352 333
Current interest-bearing loans and borrowings $ 6,484 $ 5,410