Retirement and Other Postretirement Benefit Plans - Schedule of Net Periodic Benefit Costs of Defined Benefit Retirement Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
U.S. Non-qualified Defined Benefit Retirement Plans
Net periodic benefit costs of defined benefit retirement plans
Service cost	$ 0.3		$ 0.8	$ 1.4
Interest cost	0.2	0.1	0.6	0.5
Net amortization and deferral		1.7	1.9	3.0
Settlement expense			2.7
Net periodic benefit cost	0.5	1.8	6.0	4.9
European Defined Benefit Retirement Plans
Net periodic benefit costs of defined benefit retirement plans
Service cost	0.2	0.2	0.6	0.5
Interest cost	1.7	1.8	5.3	5.3
Expected return on plan assets	(2.4)	(2.1)	(7.2)	(6.2)
Net amortization and deferral	0.2	0.3	0.5	0.9
Net periodic benefit cost	$ (0.3)	$ 0.2	$ (0.8)	$ 0.5