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Debt (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jul. 01, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |
Total debt principal | $ 14,400 | $ 4,032
Less unamortized debt issuance costs and discounts | 122 | 50
Total debt | 14,278 | 3,982
Less current portion | 2,881 | 2
Long-term debt | 11,397 | 3,980
Commercial Paper |  |
Debt Instrument [Line Items] |  |
Short term debt | $ 2,796 | 0
Weighted average interest rate | 2.137% |
Fixed Rate Notes Due May 2020 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 2,000 | 0
Interest rate | 2.875% |
Fixed Rate Notes Due May 2021 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 2,000 | 0
Interest rate | 3.00% |
Fixed-Rate Notes Due July 2021 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 500
Interest rate | 3.875% |
Fixed Rate Notes Due November 2022 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 1,000 | 1,000
Interest rate | 2.25% |
Fixed Rate Notes Due May 2023 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 750 | 0
Interest rate | 3.375% |
Fixed Rate Notes Due August 2023 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 500
Interest rate | 1.875% |
Fixed Rate Notes Due November 2024 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 500
Interest rate | 2.375% |
Fixed Rate Notes Due May 2025 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 750 | 0
Interest rate | 3.50% |
Fixed Rate Notes Due August 2026 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 500
Interest rate | 2.125% |
Fixed Rate Notes Due November 2027 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 500
Interest rate | 2.625% |
Fixed Rate Notes Due May 2028 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 1,000 | 0
Interest rate | 3.75% |
Fixed Rate Notes Due November 2042 |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 500
Interest rate | 3.60% |
Floating Rate Notes Due May 2020 | LIBOR |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 0
Basis spread on variable rate | 0.29% |
Floating Rate Notes Due May 2021 | LIBOR |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 500 | 0
Basis spread on variable rate | 0.38% |
Other Debt Securities |  |
Debt Instrument [Line Items] |  |
Long term debt | $ 104 | $ 32
Other Interest rate | Various |

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