Financial Instruments - Short-term Borrowings (Details) - USD ($) $ in Millions |
Sep. 27, 2020 |
Dec. 31, 2019 |
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|---|---|---|---|---|
| Fair Value Disclosures [Abstract] | ||||
| Commercial paper | $ 10,990 | $ 13,915 | ||
| Current portion of long-term debt, principal amount | 2,152 | 1,458 | ||
| Other short-term borrowings, principal amount | [1] | 226 | 860 | |
| Total short-term borrowings, principal amount | 13,367 | 16,233 | ||
| Net fair value adjustments related to hedging and purchase accounting | 0 | 5 | ||
| Net unamortized discounts, premiums and debt issuance costs | (4) | (43) | ||
| Total Short-term borrowings, including current portion of long-term debt, carried at historical proceeds, as adjusted | $ 13,363 | $ 16,195 | ||
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