Retirement Benefit Plans - Estimated Future Payments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
With Medicare Part D Reimbursement Other Post Employment Benefits [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2013	$ 21.1
2014	20.5
2015	19.8
2016	19.1
2017	18.5
2018-2022	78.8
U.S. Plans:
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2013	24.9
2014	24.2
2015	23.4
2016	22.9
2017	22.3
2018-2022	105.4
Non-U.S. Plans:
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2013	15.7
2014	18.0
2015	19.8
2016	18.8
2017	20.1
2018-2022	110.1
Without Medicare Part D Reimbursement Other Post Employment Benefits [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2013	21.9
2014	21.3
2015	20.6
2016	19.9
2017	19.3
2018-2022	$ 82.1