Financial Instruments and Fair Value Measurements (Details) - USD ($) $ in Millions		Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion	[1]	$ 1,687.1	$ 1,687.1
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion	[1]	$ 1,602.8	$ 1,687.5

[1] Excludes capital leases and note issuance costs.