Financial Instruments and Risk Management (Rollforward of Contingent Consideration) (Details) - USD ($) $ in Millions			3 Months Ended	12 Months Ended
		Nov. 20, 2015	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Schedule of Activity in Contingent Consideration [Roll Forward]
Balance at beginning of period				$ 564.6	$ 526.4
Acquisitions				0.0	22.8
Accretion				25.9	41.8
Payments				77.5	44.9	[1]
Reclassifications				0.0	0.0
Fair value loss (gain)	[1]			(59.3)	18.9
Foreign currency translation					(0.4)
Balance at end of period			$ 453.7	453.7	564.6
Notional amount of derivative					750.0
Long-term Debt, Gross			14,702.0	14,702.0
Topicals Business
Schedule of Activity in Contingent Consideration [Roll Forward]
Acquisitions				23.5
Payments			(40.0)
Jai Pharma Limited
Schedule of Activity in Contingent Consideration [Roll Forward]
Fair value loss (gain)				(9.9)	12.6
Other current liabilities
Schedule of Activity in Contingent Consideration [Roll Forward]
Balance at beginning of period				256.9	35.0	[2]
Acquisitions	[2]			0.0	21.6
Accretion	[2]			0.0	0.1
Payments	[2]			77.3	44.4	[1]
Reclassifications	[2]			27.0	169.8
Fair value loss (gain)	[1],[2]			(38.8)	74.8
Foreign currency translation					0.0
Balance at end of period			167.8	167.8	256.9
Other current liabilities | Topicals Business
Schedule of Activity in Contingent Consideration [Roll Forward]
Payments				(40.0)
Other current liabilities | Jai Pharma Limited
Schedule of Activity in Contingent Consideration [Roll Forward]
Payments				(20.0)
Other Noncurrent Liabilities
Schedule of Activity in Contingent Consideration [Roll Forward]
Balance at beginning of period				307.7	491.4	[3]
Acquisitions	[3]			0.0	1.2
Accretion	[3]			25.9	41.7
Payments	[3]			0.2	0.5	[1]
Reclassifications	[3]			(27.0)	(169.8)
Fair value loss (gain)	[1],[3]			(20.5)	(55.9)
Foreign currency translation					(0.4)
Balance at end of period			$ 285.9	$ 285.9	$ 307.7
Other Noncurrent Liabilities | Jai Pharma Limited
Schedule of Activity in Contingent Consideration [Roll Forward]
Acquisitions		$ 18.0

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

[2] Included in other current liabilities on the Consolidated Balance Sheets.

[3] Included in other long-term obligations on the Consolidated Balance Sheets.