Supplemental Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Maintenance and repair costs	$ 53.0	$ 53.0	$ 53.1
Research and development costs	18.8	19.7	19.8
Advertising costs	6.9	7.8	7.1
Foreign currency transaction loss, net of hedging activity		19.4	5.9
Other	0.1	0.7
Total	0.1	20.1	5.9
Interest income	2.6	1.9	2.1
Foreign currency transaction gain, net of hedging activity	6.7	3.0
Other	0.3	0.1	0.1
Total	$ 9.6	$ 5.0	$ 2.2