Retirement Plans and Post Retirement Benefits Pension Costs, Assumptions Used in Net Periodic Costs and Expected Contributions and Payments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Maximum benefit amortization period	20 years
Approximate percentage of assets represented by most significant plans	80.00%
Approximate percentage of benefit obligations represented by most significant plans	77.00%
Rate of eligible compensation increase	5.00%
Trust assets, corporate owned life insurance policies	$ 16.7	$ 16.5
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	2.9	2.8	7.5
Interest cost	15.9	16.5	16.3
Expected return on plan assets	(18.2)	(18.2)	(17.9)
Amortization of prior service cost	0.3	0.3	0.4
Amortization of net actuarial loss	4.6	2.7	4.2
Net periodic pension cost	5.5	4.1	10.5
Loss (gain) due to curtailment	0	0.2	0.3
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.12%	5.95%	6.14%
Rate of compensation increase	0.60%	0.60%	0.50%
Expected return on plan assets	7.04%	7.17%	7.28%
Other changes in plan assets and benefit obligations recognized in other comprehensive incom [Abstract]
Net actuarial (gain) loss	43.2	13.1	5.8
Amortization of net actuarial loss	(4.6)	(2.7)	(4.2)
Amortization of prior service cost	(0.3)	(0.4)	(0.4)
Foreign exchange rate changes	(0.1)	0.2	0.9
Total recognized in OCI	38.2	10.2	2.1
Expected contribution to pension plans in 2012	1
Benefits Expected to be Paid from Benefit Plans [Abstract]
2012	18.2
2013	18.2
2014	35.2
2015	19.3
2016	19.6
2017 - 2021	$ 109.3