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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Net debt and Short-term investments (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Loans and borrowings        
Leases $ 1,602 $ 1,667    
Total of loans, borrowings and leases 13,782 15,027    
Cash and cash equivalents 11,721 13,487 $ 7,350 $ 5,784
Short-term investments 184 771    
Net debt (cash) 1,877 769    
Debt contracts in the international markets        
Loans and borrowings        
Total of loans, borrowings and leases $ 12,180 $ 13,360