Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
U.S. Retirement Plan
Components of net periodic pension (cost) income:
Service cost	$ 0.2	$ 0.2	$ 0.4	$ 0.4
Interest cost	1.9	2.2	3.8	4.6
Expected return on plan assets	(3.5)	(3.7)	(7.1)	(7.4)
Recognized net actuarial (gain) loss	0.0	(0.1)	0.0	(0.2)
Gain from partial settlement	0.0	(6.9)	0.0	(6.9)
Net periodic pension (income) cost	(1.4)	(8.3)	(2.9)	(9.5)
Contributions to defined benefit plan made by employer			0.0
Estimated employer contributions during the remainder of year			0.0
German, French and UK Plans
Components of net periodic pension (cost) income:
Service cost	0.4	0.4	0.8	0.8
Interest cost	1.3	1.7	2.6	3.4
Expected return on plan assets	(1.2)	(1.5)	(2.4)	(2.9)
Recognized net actuarial (gain) loss	0.9	0.5	1.8	1.0
Net periodic pension (income) cost	$ 1.4	$ 1.1	2.8	$ 2.3
Contributions to defined benefit plan made by employer			0.1
Estimated employer contributions during the remainder of year			$ 0.7