Other Long-Term Liabilities (Schedule of Other Long-Term Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Long-term deferred compensation arrangements	$ 16.3	$ 18.7
Long-term portion of derivative liabilities	0.5	10.6
Environmental liabilities	4.7	6.0
Other	7.6	8.0
Total other long-term liabilities	$ 29.1	$ 43.3