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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Foreign currency translation adjustments, income tax (expense) benefit $ 0 $ 0
Change in derivative fair value, income tax benefit 18 133
Derivative reclassification to earnings, income tax expense (2) (8)
Pension, Reclassifications to Earnings, Net of Income Tax (expense) benefit $ 0 $ 0