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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement of Comprehensive Income [Abstract]      
Net income $ 8,394 $ 1,979 $ 7,722
Other comprehensive (loss) income, net of reclassification adjustments and taxes:      
(Losses) gains on foreign currency translation (141) 81 (99)
Gains (losses) on cash flow hedges 247 (288) (15)
(Losses) gains on available-for-sale securities (185) (6) 122
Other (2) 5 1
Other comprehensive (loss) income, net of tax (81) (208) 9
Comprehensive income $ 8,313 $ 1,771 $ 7,731