Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions			12 Months Ended
		Jun. 15, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Apr. 01, 2017	Aug. 05, 2016
Intangible Assets Excluding Goodwill [Line Items]
Intangible asset impairment charges			$ 80.8	$ 68.3	$ 31.3
Fair value loss (gain)	[1]		(59.3)	18.9
Business Combination, Contingent Consideration, Liability			453.7	564.6	526.4
Goodwill, Impaired, Accumulated Impairment Loss			385.0	$ 385.0	385.0
Minimum
Intangible Assets Excluding Goodwill [Line Items]
Discount rate used in valuation of in-process research and development				0.90%
Maximum
Intangible Assets Excluding Goodwill [Line Items]
Discount rate used in valuation of in-process research and development				9.80%
In-process research and development
Intangible Assets Excluding Goodwill [Line Items]
Intangible asset impairment charges			$ 74.6	$ 49.9	$ 31.3
In-process research and development | Minimum
Intangible Assets Excluding Goodwill [Line Items]
Discount rate used in valuation of in-process research and development			8.40%	8.50%	9.80%
In-process research and development | Maximum
Intangible Assets Excluding Goodwill [Line Items]
Discount rate used in valuation of in-process research and development			10.50%	11.90%	11.80%
Meda AB
Intangible Assets Excluding Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 8,060.7			$ 8,060.7	[2]
Topicals Business
Intangible Assets Excluding Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 467.0
In-process research and development		$ 275.0
Discount rate used in valuation of in-process research and development		12.50%
Business Combination, Contingent Consideration, Liability		$ 16.0
Product rights and licenses
Intangible Assets Excluding Goodwill [Line Items]
Impairment of products rights and licenses intangible assets			$ 6.2	18.4	$ 0.0
Product rights and licenses | Meda AB
Intangible Assets Excluding Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							$ 8,060.0
Product rights and licenses | Topicals Business
Intangible Assets Excluding Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 454.0
North America Generics [Member]
Intangible Assets Excluding Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss						$ 2,890.0
North America Specialty [Member]
Intangible Assets Excluding Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss						350.0
Europe Segment
Intangible Assets Excluding Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss			0.0	0.0	0.0	4,300.0
Rest of World Segment
Intangible Assets Excluding Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss			$ 0.0	$ 0.0	$ 0.0	$ 1,790.0

[1] Included in litigation settlements and other contingencies, net in the Consolidated Statements of Operations.

[2] As previously reported in the Company’s December 31, 2016 Annual Report on Form 10-K, as amended.