Identifiable Intangible Assets and Goodwill - Goodwill (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Goodwill [Roll Forward] | ||
| Beginning balance | $ 53,411 | $ 55,952 |
| Additions | 5,411 | |
| Other | (169) | (2,541) |
| Ending balance | 58,653 | 53,411 |
| Biopharma Segment [Member] | ||
| Goodwill [Roll Forward] | ||
| Additions | 5,411 | |
| Other | (432) | |
| Upjohn Segment [Member] | ||
| Goodwill [Roll Forward] | ||
| Additions | 0 | |
| Other | (116) | |
| Consumer Healthcare [Member] | ||
| Goodwill [Roll Forward] | ||
| Additions | 0 | |
| Other | (1,993) | |
| Operating Segments [Member] | Biopharma Segment [Member] | ||
| Goodwill [Roll Forward] | ||
| Beginning balance | 42,927 | 43,359 |
| Other | (136) | |
| Ending balance | 48,202 | 42,927 |
| Operating Segments [Member] | Upjohn Segment [Member] | ||
| Goodwill [Roll Forward] | ||
| Beginning balance | 10,484 | 10,600 |
| Other | (33) | |
| Ending balance | 10,451 | 10,484 |
| Operating Segments [Member] | Consumer Healthcare [Member] | ||
| Goodwill [Roll Forward] | ||
| Beginning balance | 0 | 1,993 |
| Other | 0 | |
| Ending balance | $ 0 | $ 0 |