Pension and Other Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 31, 2015
Pension Benefits
Components of net periodic benefit cost [Line Items]
Service cost	$ 4.5	$ 3.7
Interest cost	10.1	10.2
Expected return on plan assets	(13.2)	(11.3)
Amortization of prior service cost	0	0.1
Amortization of actuarial losses/(gains)	2.9	0.9
NET PERIODIC BENEFIT COST	4.3	3.6
Other Benefits
Components of net periodic benefit cost [Line Items]
Service cost	0	0
Interest cost	0.3	0.2
Expected return on plan assets	0	0
Amortization of prior service cost	(0.2)	(0.2)
Amortization of actuarial losses/(gains)	0	0
NET PERIODIC BENEFIT COST	0.1	0
Foreign Plan
Components of net periodic benefit cost [Line Items]
Contribution to defined benefit pension plans	0.6
Defined benefit plan estimated total employer contributions in current fiscal year	2.8
Domestic Plan
Components of net periodic benefit cost [Line Items]
Contribution to defined benefit pension plans	$ 0		$ 20.0