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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

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