Benefit Plans and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
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			$ 2.2	$ 1.8
Pension Benefits
Summary of the defined benefit pension plans and other post-retirement benefits
Service cost	$ 2.3	$ 2.0	4.7	4.1
Interest cost	5.8	6.0	11.6	12.1
Expected return on plan assets	(7.3)	(7.1)	(14.6)	(14.3)
Amortization of prior service cost	0.6	0.7	1.2	1.3
Amortization of net actuarial losses	6.5	4.0	12.9	8.0
Net pension expense	7.9	5.6	15.8	11.2
U.S. plans, Pension Benefits
Summary of the defined benefit pension plans and other post-retirement benefits
Estimated cash contribution to the Plans in 2015 based on current actuarial calculations			22.0
Other Postretirement Benefits
Summary of the defined benefit pension plans and other post-retirement benefits
Service cost				0.1
Interest cost	0.1	0.1	0.2	0.2
Amortization of net actuarial losses	0.1	0.1	0.2	0.2
Net pension expense	$ 0.2	$ 0.2	$ 0.4	$ 0.5