Benefit Plans, Accumulated Benefit Obligation in Excess of Plan Assets (Details) - Pension Benefits [Member] - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
U.S. Plans [Member]
Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligations	$ 0.1	$ 1.1
Accumulated benefit obligation	0.1	1.1
Fair value of plan assets	0.0	0.0
Accumulated benefit obligation	58.6	59.7
Non-U.S. Plans [Member]
Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligations	323.0	311.9
Accumulated benefit obligation	318.9	307.2
Fair value of plan assets	228.2	193.3
Accumulated benefit obligation	$ 329.4	$ 316.8