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Other (Income) Expense, Net - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Other Income and Expenses [Abstract]      
Goodwill impairment charges $ 78 $ 162  
Gain on settlement     $ 115
Interest paid   $ 356 $ 341