Fair Value Measurement (Qualitative Information About Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs) (Details) - Recurring Basis $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Contingent Consideration Payable \| Income approach (probability weighted discounted cash flow)
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liabilities	$ 1,186.9
Derivative Financial Instruments, Liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Assumed market participant discount rate	16.00%
Minimum \| Contingent Consideration Payable
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Cumulative probability of milestones being achieved (in percent)	17.00%
Assumed market participant discount rate	1.80%
Periods in which milestones are expected to be achieved	2017
Forecast quarterly royalties payable on net sales of relevant products	$ 0.1
Minimum \| Derivative Financial Instruments, Liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Cash flow scenario probability weighting	0.00%
Maximum \| Contingent Consideration Payable
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Cumulative probability of milestones being achieved (in percent)	90.00%
Assumed market participant discount rate	8.90%
Periods in which milestones are expected to be achieved	2040
Forecast quarterly royalties payable on net sales of relevant products	$ 6.5
Maximum \| Derivative Financial Instruments, Liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Cash flow scenario probability weighting	65.00%
Fair value
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Joint venture net written option	$ 25.0

Cumulative probability of milestones being achieved, used as an input to measure fair value.

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Estimated quarterly royalties payable on net sales of relevant products, used as an input to measure fair value.

+ References

No definition available.

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- Definition

Periods in which milestones are expected to be achieved, used as an input to measure fair value.

+ References

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- Definition

Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value.

+ References

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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