Acquisition, Equity-Method Investment and Licensing Arrangements - BioNTech (Details) - Licensing Agreements [Member] - BionTech [Member] - USD ($) $ in Millions |
1 Months Ended | 3 Months Ended | |
|---|---|---|---|
Apr. 09, 2020 |
Jul. 31, 2020 |
Jun. 28, 2020 |
|
| Business Acquisition [Line Items] | |||
| Value of shares purchased | $ 50 | $ 113 | |
| Potential future milestone payments | $ 563 | ||
| Maximum potential cash payments | $ 748 | ||
| Research and development arrangement, percentage of costs to be reimbursed | 50.00% | ||
| Research and Development Expense [Member] | |||
| Business Acquisition [Line Items] | |||
| Upfront payment for licensing arrangement | $ 72 |