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Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Comprehensive Income [Abstract]    
Net income $ 1,040 $ 2,617
Other comprehensive income, net of tax (Note 17)    
Foreign currency translation adjustments and other 34 108
Defined benefit plans (7) (29)
Other comprehensive income, net of tax 27 79
Comprehensive income 1,067 2,696
Comprehensive (income) loss attributable to noncontrolling interests 7 (8)
Comprehensive income attributable to stockholders $ 1,074 $ 2,688