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Acquisitions, Divestitures, Research Collaborations and License Agreements - Divestitures Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended
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Jan. 31, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Acquisitions, Divestitures, Research Collaborations and License Agreements Transactions [Line Items] |  |  |
Proceeds from sale of marketing rights |  | $ 60 | $ 75
Corticotropin marketing rights |  |  |
Acquisitions, Divestitures, Research Collaborations and License Agreements Transactions [Line Items] |  |  |
Proceeds from sale of marketing rights | $ 75 |  |

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- Definition The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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