Retirement Benefit Plans Retirement Benefit Plans - Funded status of plans with ABO in excess of plan assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	$ (752.0)	$ (757.7)
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	612.7	458.0
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	(139.3)	(299.7)
United States Pension Deficiency [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	(19.5)	(47.4)
United Kingdom Pension Deficiency [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	(15.3)	(22.4)
Germany Pension Deficiency [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	(68.6)	(192.4)
Other Countries Pension Deficiency [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	$ (35.9)	$ (37.5)