Business Combinations (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Baxalta
Pro Forma Information
Revenues	$ 3,484.1	$ 2,986.6	$ 6,741.4	$ 5,836.0
Net income/(loss) from continuing operations	$ 716.0	$ (401.4)	$ 1,177.3	$ (976.1)
Net income/(loss) from continuing operations per share - basic	$ 0.81	$ (0.45)	$ 1.33	$ (1.09)
Net income/(loss) from continuing operations per share - diluted	$ 0.81	$ (0.45)	$ 1.32	$ (1.09)
Pro Forma Data Adjustments
Decrease to net income to reflect the additional depreciation expense related to the fair value adjustment to property, plant and equipment acquired	$ 3.5	$ 5.2	$ 8.7	$ 10.5
An adjustment to increase amortization of intangible assets	(104.4)	(166.7)	(258.6)	(333.4)
Increase/(decrease) to net income to reflect acquisition related costs	361.6		400.9	(400.9)
Decrease to net income to reflect the additional interest expense	(42.5)	(87.4)	(59.0)	(174.0)
Increase/(decrease) to net income to reflect the fair value adjustment to acquisition date inventory.	206.4	(600.7)	206.4	(1,201.3)
Dyax
Pro Forma Information
Revenues	2,429.1	1,584.0	4,144.3	3,092.8
Net income/(loss) from continuing operations	$ 88.6	$ 128.3	$ 490.2	$ 406.3
Net income/(loss) from continuing operations per share - basic	$ 0.13	$ 0.22	$ 0.77	$ 0.69
Net income/(loss) from continuing operations per share - diluted	$ 0.13	$ 0.22	$ 0.77	$ 0.69
Pro Forma Data Adjustments
An adjustment to increase amortization of intangible assets		$ (5.4)	$ (1.3)	$ (10.8)
Increase/(decrease) to net income to reflect acquisition related costs	$ 2.0		$ 101.2	(101.2)
Decrease to net income to reflect the additional interest expense		(20.4)		(40.8)
Increase/(decrease) to net income to reflect the fair value adjustment to acquisition date inventory.		(1.6)		(2.3)
NPS Pharma
Pro Forma Information
Revenues		1,557.6		3,075.9
Net income/(loss) from continuing operations		$ 167.8		$ 526.6
Net income/(loss) from continuing operations per share - basic		$ 0.28		$ 0.96
Net income/(loss) from continuing operations per share - diluted		$ 0.28		$ 0.95
Pro Forma Data Adjustments
An adjustment to increase amortization of intangible assets		$ 0.0		$ (21.1)
Increase/(decrease) to net income to reflect acquisition related costs		0.4		106.8
Increase/(decrease) to net income to reflect the fair value adjustment to acquisition date inventory.		$ 3.1		$ 9.2

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An adjustment to net income to reflect the acquisition and integration costs incurred in relation to the acquisition.

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A pro forma adjustment to increase (decrease) amortization of an acquired intangible asset resulting from an assumed earlier acquisition date.

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A pro forma adjustment to increase interest expense associated with the debt issued to partially finance the acquisition.

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A pro forma adjustment to reflect the increase in depreciation expense related to the fair value adjustment to property, plant and equipment acquired.

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An adjustment to net income to reflect the acquisition and integration costs incurred in relation to the acquisition.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect per basic share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, per diluted share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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