Net Periodic Pension and Postretirement Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Anticipated cash contributions
Anticipated cash contributions to pension plans in 2016	$ 5.0
United States Pension Plan of US Entity, Defined Benefit
Components of Net Periodic Benefit Costs
Service cost	1.5	$ 1.9
Interest cost	3.4	3.2
Expected return on plan assets	(5.0)	(5.5)
Amortization of net actuarial loss	0.2	0.2
Net pension cost (credit) / Net postretirement benefit cost	0.1	(0.2)
Anticipated cash contributions
Anticipated cash contributions to pension plans in 2016	1.0
United States Pension Plan of US Entity, Defined Benefit | Maximum
Employer Contributions
Cash contributions to defined benefit pension plan	1.0
Foreign Pension Plan, Defined Benefit
Components of Net Periodic Benefit Costs
Service cost	0.8	1.2
Interest cost	2.6	3.0
Expected return on plan assets	(2.7)	(3.4)
Amortization of initial net obligation (asset)	0.1
Amortization of net actuarial loss	0.4	0.6
Amortization of transition obligation		0.1
Settlement loss	0.4
Net pension cost (credit) / Net postretirement benefit cost	1.6	1.5
Employer Contributions
Cash contributions to defined benefit pension plan	1.0
Anticipated cash contributions
Anticipated cash contributions to pension plans in 2016	4.0
Canadian Plans
Components of Net Periodic Benefit Costs
Improvement in the funded status		9.0
Other Postretirement Benefit Plans Defined Benefit
Components of Net Periodic Benefit Costs
Service cost	0.2	0.2
Interest cost	0.7	0.7
Amortization of net actuarial loss		0.1
Amortization of prior service credit	(0.8)	(0.5)
Net pension cost (credit) / Net postretirement benefit cost	$ 0.1	$ 0.5