Fair Value Measurement (Quantitative Information About Recurring and Non-recurring Level 3 Fair Value Measurements) (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Senior Notes, Noncurrent	$ 5,114.0	$ 0.0
Capital lease obligation	$ (348.9)
Recurring Basis \| Contingent Consideration Payable \| Minimum
Fair Value Inputs
Assumed market participant discount rate	1.50%
Cumulative probability of milestones being achieved (in percent)	1.00%
Periods in which milestones are expected to be achieved	2016
Forecast quarterly royalties payable on net sales of relevant products	$ 1.4
Recurring Basis \| Contingent Consideration Payable \| Maximum
Fair Value Inputs
Assumed market participant discount rate	12.40%
Cumulative probability of milestones being achieved (in percent)	90.00%
Periods in which milestones are expected to be achieved	2036
Forecast quarterly royalties payable on net sales of relevant products	$ 3.8
Recurring Basis \| Contingent Consideration Payable \| Income approach (probability weighted discounted cash flow)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Liabilities	993.8
Recurring Basis \| Contingent Consideration Receivable \| Income approach (probability weighted discounted cash flow)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets	$ 17.5
Fair Value Inputs
Assumed market participant discount rate	8.40%
Recurring Basis \| Contingent Consideration Receivable \| Income approach (probability weighted discounted cash flow) \| Minimum
Fair Value Inputs
Probability weightings applied to different sales scenarios (in percent)	10.00%
Future forecast consideration receivable based on contractual terms with purchaser	$ 0.0
Recurring Basis \| Contingent Consideration Receivable \| Income approach (probability weighted discounted cash flow) \| Maximum
Fair Value Inputs
Probability weightings applied to different sales scenarios (in percent)	90.00%
Future forecast consideration receivable based on contractual terms with purchaser	$ 25.0
Nonrecurring Basis \| Carrying value
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Senior Notes, Noncurrent	5,114.0	0.0
Capital lease obligation	348.9	13.4
Nonrecurring Basis \| Fair value
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Senior Notes, Noncurrent	5,114.0	0.0
Capital lease obligation	$ 348.9	$ 13.4

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

Future forecast consideration receivable based on contractual terms with the purchaser, 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

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Probability weightings applied to different sales scenarios, used as an input to measure fair value.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ 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=36462937&loc=d3e19207-110258

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- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 7

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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

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=36462937&loc=d3e19207-110258

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

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- Definition

Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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