Financial Instruments - Financial Liabilities Not Measured at Fair Value on a Recurring Basis - Footnotes (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 27, 2020 |
Sep. 29, 2019 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Proceeds from issuance of long-term debt | $ 16,700 | $ 4,942 |
| Subsidiaries [Member] | Upjohn Inc [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Proceeds from issuance of long-term debt | $ 11,400 | |