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Other Financial Information Other Accrued Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Other Financial Information [Abstract]    
Compensation and employee benefits $ 380 $ 599
Income taxes payable 645 287
Other accrued expenses 1,808 2,188
Total $ 2,833 $ 3,074