| Goodwill and Intangible Assets Disclosure [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Goodwill and Intangible Assets Disclosure [Abstract] | |
Summary of changes in the carrying amount of the entity's goodwill | The following table summarizes the changes in the carrying amount of goodwill: | | | | | (in millions) | | Balance as of December 31, 2014 | $ | 5,862 |
| Additions (see Note 5) | 7,610 |
| Foreign currency translation and other adjustments | (304 | ) | Balance as of December 31, 2015 | 13,168 |
| Additions (see Note 5) | 2,360 |
| Foreign currency translation and other adjustments | (112 | ) | Balance as of December 31, 2016 | $ | 15,416 |
|
|
Schedule of definite-lived intangible assets | The following table summarizes intangible assets: | | | | | | | | | | | | | | | | | | | | | | | | | | 2016 | | 2015 | as of December 31 (in millions) | Gross carrying amount | | Accumulated amortization | | Net carrying amount | | Gross carrying amount | | Accumulated amortization | | Net carrying amount | Definite-lived intangible assets | | | | | | | | | | | | Developed product rights | $ | 16,464 |
| | $ | (4,256 | ) | | $ | 12,208 |
| | $ | 9,103 |
| | $ | (3,944 | ) | | $ | 5,159 |
| License agreements | 7,809 |
| | (1,110 | ) | | 6,699 |
| | 8,000 |
| | (1,023 | ) | | 6,977 |
| Total definite-lived intangible assets | 24,273 |
| | (5,366 | ) | | 18,907 |
| | 17,103 |
| | (4,967 | ) | | 12,136 |
| Indefinite-lived research and development | 9,990 |
| | — |
| | 9,990 |
| | 7,573 |
| | — |
| | 7,573 |
| Total intangible assets, net | $ | 34,263 |
| | $ | (5,366 | ) | | $ | 28,897 |
| | $ | 24,676 |
| | $ | (4,967 | ) | | $ | 19,709 |
|
|
Schedule of indefinite-lived intangible assets | The following table summarizes intangible assets: | | | | | | | | | | | | | | | | | | | | | | | | | | 2016 | | 2015 | as of December 31 (in millions) | Gross carrying amount | | Accumulated amortization | | Net carrying amount | | Gross carrying amount | | Accumulated amortization | | Net carrying amount | Definite-lived intangible assets | | | | | | | | | | | | Developed product rights | $ | 16,464 |
| | $ | (4,256 | ) | | $ | 12,208 |
| | $ | 9,103 |
| | $ | (3,944 | ) | | $ | 5,159 |
| License agreements | 7,809 |
| | (1,110 | ) | | 6,699 |
| | 8,000 |
| | (1,023 | ) | | 6,977 |
| Total definite-lived intangible assets | 24,273 |
| | (5,366 | ) | | 18,907 |
| | 17,103 |
| | (4,967 | ) | | 12,136 |
| Indefinite-lived research and development | 9,990 |
| | — |
| | 9,990 |
| | 7,573 |
| | — |
| | 7,573 |
| Total intangible assets, net | $ | 34,263 |
| | $ | (5,366 | ) | | $ | 28,897 |
| | $ | 24,676 |
| | $ | (4,967 | ) | | $ | 19,709 |
|
|
Summary of anticipated annual amortization expense | The anticipated annual amortization expense for definite lived intangible assets recorded as of December 31, 2016 is as follows: | | | | | | | | | | | | | | | | | | | | | (in billions) | 2017 | | 2018 | | 2019 | | 2020 | | 2021 | Anticipated annual amortization expense | $ | 1.1 |
| | $ | 1.3 |
| | $ | 1.6 |
| | $ | 1.8 |
| | $ | 2.0 |
|
|