Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Definite-lived intangible assets | ||
| Gross carrying amount | $ 97,432 | $ 95,535 |
| Accumulated amortization | (22,151) | (14,536) |
| Net carrying amount | 75,281 | 80,999 |
| Indefinite-lived research and development | 670 | 1,877 |
| Total intangible assets gross carrying amount | 98,102 | 97,412 |
| Total intangible assets, net | 75,951 | 82,876 |
| Developed product rights | ||
| Definite-lived intangible assets | ||
| Gross carrying amount | 88,945 | 87,707 |
| Accumulated amortization | (18,463) | (11,620) |
| Net carrying amount | 70,482 | 76,087 |
| License agreements | ||
| Definite-lived intangible assets | ||
| Gross carrying amount | 8,487 | 7,828 |
| Accumulated amortization | (3,688) | (2,916) |
| Net carrying amount | $ 4,799 | $ 4,912 |