Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Actual contribution to defined benefit pension plans	$ 4.5
United States Pension Plan of US Entity [Member]
Components of net periodic benefit cost:
Service cost	0	0
Interest cost	2.8	3.1
Expected return on plan assets	(4.3)	(4.4)
Amortization of unrecognized prior service benefit	(0.2)	(0.2)
Amortization of unrecognized loss	1.6	1.6
Net periodic benefit (income) cost	(0.1)	0.1
Foreign Pension Plan [Member]
Components of net periodic benefit cost:
Service cost	3.7	3.3
Interest cost	3.6	4.6
Expected return on plan assets	(6.2)	(5.4)
Amortization of unrecognized prior service benefit	0	0
Amortization of unrecognized loss	1.7	1.2
Net periodic benefit (income) cost	2.8	3.7
Other Postretirement Benefit Plan [Member]
Components of net periodic benefit cost:
Service cost	0.1	0
Interest cost	1.4	1.7
Expected return on plan assets	0	0
Amortization of unrecognized prior service benefit	(1.4)	(1.6)
Amortization of unrecognized loss	0.7	0.7
Net periodic benefit (income) cost	0.8	0.8
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	15.0
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 25.0