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Contingencies - Patent Litigation - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended | 36 Months Ended | 84 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2026 | Dec. 31, 2023
Anti-PD-1 Antibody Patent Case |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Payment under settlement and license agreement |  |  | $ 625 |  |
Anti-PD-1 Antibody Patent Case | Forecast |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Royalty rate (as percent) |  |  |  | 2.50% | 6.50%
Gilead Patent Case |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Percentage of settlement to be paid to third-party (as percent) |  | 20.00% |  |  |
Amount awarded to company | $ 2,540 | $ 200 |  |  |

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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