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Financial Instruments - Credit Losses (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Receivables [Abstract]    
Allowance for credit loss $ 780 $ 745
Trade receivable 24,200  
Non-trade receivable 4,100  
Investments and Advances    
Related Party Transaction [Line Items]    
Allowance for credit loss $ 560 $ 560