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Fair Value Measurements - Schedule of Effect of Derivatives not Designated as Hedging Instruments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017
Not Designated as Hedging Instrument | Foreign exchange contracts | Other (income) expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain/(Loss) Recognized In Income on Derivative | $ 49 | $ (12) | $ (23) | $ 22

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