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Other Financial Information - Schedule of Other Accrued Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Other Financial Information [Abstract]    
Employee-related Liabilities, Current $ 599 $ 555
Accrued Income Taxes, Current 287 190
Accrued Liabilities and Other Liabilities 0 365
Other Accrued Liabilities, Current 2,188 2,029
Accrued Liabilities, Current $ 3,074 $ 3,139