Financial Instruments and Risk Management Financial Instruments and Risk Management (Rollforward of Contingent Consideration) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Document Fiscal Year Focus		2019
Accretion expense		$ 3.9
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	[1]	(4.1)
Business Combination Contingent Consideration Liability Payments		(60.0)
Business Combination, Contingent Consideration Arrangements, Reclassifications		0.0
Contingent consideration		295.1	$ 355.3
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]	3.5
Business Combination Contingent Consideration Liability Payments	[2]	(60.0)
Business Combination, Contingent Consideration Arrangements, Reclassifications		13.1
Contingent consideration		114.9	158.3
Other long-term obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accretion expense	[3]	3.9
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	[1],[3]	(7.6)
Business Combination Contingent Consideration Liability Payments	[3]	0.0
Business Combination, Contingent Consideration Arrangements, Reclassifications		(13.1)
Contingent consideration		180.2	$ 197.0
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		4.1
Contingent consideration		276.4
Respiratory delivery platform [Member] | Prepaid expenses and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination Contingent Consideration Liability Payments		$ (60.0)

[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.