Benefit Plans and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Summary of the defined benefit pension plans and other post-retirement benefits
Contributions to U.S. defined contribution plans by the Company, maximum percentage of eligible compensation	5.00%
Matching contributions to U.S. defined contribution plans by the Company	$ 1.2	$ 1.2
Pension Benefits
Summary of the defined benefit pension plans and other post-retirement benefits
Service cost	2.3	2.3
Interest cost	5.7	5.8
Expected return on plan assets	(7.5)	(7.3)
Amortization of prior service cost	0.6	0.6
Amortization of net actuarial losses	6.3	6.5
Net pension expense	7.4	7.9
U.S. plans, Pension Benefits
Summary of the defined benefit pension plans and other post-retirement benefits
Estimated cash contribution to the Plans in 2016 based on current actuarial calculations	22.0
Other Postretirement Benefits
Summary of the defined benefit pension plans and other post-retirement benefits
Interest cost	0.1	0.1
Amortization of net actuarial losses	0.2	0.1
Net pension expense	$ 0.3	$ 0.2