Financial Instruments - Financial Liabilities Not Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions |
Sep. 27, 2020 |
Dec. 31, 2019 |
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|---|---|---|---|---|
| Carrying Value [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Long-term debt, excluding the current portion | [1] | $ 49,785 | $ 35,955 | |
| Estimated Fair Value [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Long-term debt, excluding the current portion | [1] | 59,073 | 40,842 | |
| Estimated Fair Value [Member] | Level 2 [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Long-term debt, excluding the current portion | [1] | $ 59,073 | $ 40,842 | |
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