Financial Instruments and Risk Management Financial Instruments and Risk Management (Rollforward of Contingent Consideration) (Details) - USD ($) $ in Millions			3 Months Ended	9 Months Ended
		Oct. 22, 2018	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accretion expense				$ 15.1
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	[1]			(48.9)
Business Combination Contingent Consideration Liability Payments				(1.1)
Business Combination, Contingent Consideration Arrangements, Reclassifications				0.0
Contingent consideration			$ 418.8	418.8	$ 453.7
Payment for Contingent Consideration Liability, Financing Activities			20.0
Prepaid expenses and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accretion expense	[2]			0.0
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	[1],[2]			3.0
Business Combination Contingent Consideration Liability Payments	[2]			(1.1)
Business Combination, Contingent Consideration Arrangements, Reclassifications				53.6
Contingent consideration			223.3	223.3	167.8
Other long-term obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accretion expense	[3]			15.1
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	[1],[3]			(51.9)
Business Combination Contingent Consideration Liability Payments	[3]			0.0
Business Combination, Contingent Consideration Arrangements, Reclassifications				(53.6)
Contingent consideration			195.5	195.5	$ 285.9
Respiratory delivery platform [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings			19.3	49.3
Contingent consideration			$ 326.6	$ 326.6
Subsequent Event [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment for Contingent Consideration Liability, Financing Activities		$ 30.0

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

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

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