Pension (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Benefits [Member]
Components of net periodic benefit cost [Line Items]
Service cost	$ 4.8	$ 4.1	$ 12.8	$ 12.2
Interest cost	9.2	9.3	27.4	27.4
Expected return on plan assets	(11.8)	(10.1)	(35.1)	(30.0)
Amortization of prior service cost	0	0	0.1	0.1
Amortization of actuarial losses/(gains)	3.3	4.8	10.4	13.1
Net periodic benefit cost	5.5	8.1	15.6	22.8
Other Benefits [Member]
Components of net periodic benefit cost [Line Items]
Service cost	0	0	0	0
Interest cost	0.3	0.4	0.9	1.1
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	(0.2)	0	(0.7)	0
Amortization of actuarial losses/(gains)	(0.1)	(0.3)	(0.1)	(0.8)
Net periodic benefit cost	0	0.1	0.1	0.3
Foreign Plan [Member]
Components of net periodic benefit cost [Line Items]
Contribution to defined benefit pension plans			2.5
Defined Benefit Plan Estimated Total Employer Contributions In Current Fiscal Year			3.0
Domestic Plan [Member]
Components of net periodic benefit cost [Line Items]
Contribution to defined benefit pension plans			$ 0