Retirement Benefit Plans - Estimated Future Payments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
With Medicare Part D Reimbursement Other Post Employment Benefits [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	$ 24.9
2013	24.1
2014	23.4
2015	22.6
2016	21.7
2017-2021	96.1
U.S. pension plans [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	25.1
2013	25.1
2014	24.6
2015	23.7
2016	23.6
2017-2021	110.5
Non-U.S. pension plans [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	14.6
2013	16.0
2014	17.2
2015	19.3
2016	18.5
2017-2021	103.7
Without Medicare Part D Reimbursement Other Post Employment Benefits [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	25.8
2013	25.0
2014	24.2
2015	23.5
2016	22.5
2017-2021	$ 99.7