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Fair Value Measurements - Schedule of Effect of Net Investment Hedges (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2019 | Apr. 01, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain/(Loss) Recognized In Accumulated OCI | $ 71 | $ (150)
Sale of Subsidiary Gain (Loss) |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain/(Loss) Reclassified From Accumulated OCI Into Income | 0 | 0
Other Income Expense Net |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain/(Loss) Reclassified From Accumulated OCI Into Income | 0 | 0
Cross Currency Interest Rate Contract |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain/(Loss) Recognized In Accumulated OCI | $ 370 | $ 0

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