Supplemental Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Financial Information [Abstract]
Maintenance and repair costs	$ 92.6	$ 89.0	$ 89.7
Research and development costs	31.1	30.6	29.3
Advertising costs	10.6	10.9	12.2
Foreign currency transaction loss, net of hedging activity	22.8	8.4	1.6
Other	0.7	2.1	0.4
Total	23.5	10.5	2.0
Interest income	2.2	2.5	3.3
Foreign currency transaction gain, net of hedging activity	3.0		0.1
Other	0.1	0.1	0.4
Total	$ 5.3	$ 2.6	$ 3.8