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Fair Value Measurements - Schedule of Effect of Net Investment Hedges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain/(Loss) Recognized In Accumulated OCI | $ (50) | $ (151) | $ 106 | $ (529)
Sale of Subsidiary Gain (Loss) [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain/(Loss) Reclassified From Accumulated OCI Into Income | 0 | 0 | 0 | 0
Other Income Expense Net [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain/(Loss) Reclassified From Accumulated OCI Into Income | 0 | 0 | 0 | 0
Cross Currency Interest Rate Contract [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain/(Loss) Recognized In Accumulated OCI | $ (75) | $ 0 | $ (37) | $ 0

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