v3.7.0.1
Condensed Consolidated Statements of Comprehensive Income Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Comprehensive Income (Parenthetical) [Abstract]    
Unrealized losses on hedging activities - tax effect $ (15) $ (36)