Integration and Acquisition Costs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Integration and acquisition costs (credits)	$ 239.7	$ 116.0
Payments for restructuring	37.6
Baxalta
Business Acquisition [Line Items]
Integration and acquisition costs (credits)	239.7	116.0
Asset impairments \| Baxalta
Business Acquisition [Line Items]
Integration and acquisition costs (credits)	137.5
Third-party professional fees \| Baxalta
Business Acquisition [Line Items]
Integration and acquisition costs (credits)	21.9
Integration costs		35.2
Facility consolidations \| Baxalta
Business Acquisition [Line Items]
Integration and acquisition costs (credits)	11.7
Integration costs		24.5
Employee severance and acceleration of stock compensation \| Baxalta
Business Acquisition [Line Items]
Integration and acquisition costs (credits)	$ 5.8
Integration costs		$ 36.9

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

+ References

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

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