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Collaborative and Other Relationships Collaborative and Other Relationships - Equity Method Investments (Details 1) | 3 Months Ended | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2014 USD ($) | Mar. 31, 2013 USD ($) | Feb. 29, 2012 Samsung Biosimilar Agreement [Member] USD ($) | Feb. 29, 2012 Samsung Biosimilar Agreement [Member] KRW | Mar. 31, 2014 Samsung Biosimilar Agreement [Member] USD ($) | Dec. 31, 2013 Samsung Biosimilar Agreement [Member] USD ($) | Mar. 31, 2013 Samsung Biosimilar Agreement [Member] USD ($) | Mar. 31, 2014 Samsung Biosimilar Agreement [Member] KRW | Dec. 31, 2013 Samsung Biosimilar Agreement [Member] KRW
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Contribution from Samsung to develop, manufacture and market biosimilar pharmaceuticals |  |  | $ 250,000,000 | 280,500,000,000 |  |  |  |  |
Variable interest entity, qualitative or quantitative information, ownership percentage |  |  | 85.00% | 85.00% |  |  |  |  |
Contribution from Biogen Idec to develop, manufacture and market biosimilar pharmaceuticals |  |  | 45,000,000 | 49,500,000,000 | 17,500,000 | 23,900,000 |  | 18,400,000,000 | 25,200,000,000
Percentage of stake in entity minimum |  |  | 15.00% | 15.00% | 12.00% |  |  |  |
Percentage of stake in entity maximum |  |  | 49.90% | 49.90% |  |  |  |  |
Recognized loss | (7,605,000) | (3,811,000) |  |  | (7,600,000) |  | (3,800,000) |  |
Revenue related to technical development and technology transfer services | 90,101,000 | 54,711,000 |  |  | 24,100,000 |  | 6,800,000 |  |
Research and development expense |  |  |  |  |  | 36,000,000 |  |  |
Additional milestone payment |  |  |  |  |  | $ 85,000,000 |  |  |
Equity Method Investments, Expected Profit Share |  |  |  |  |  | 50.00% |  |  |

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