Benefit Plans Textuals (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	$ 8,400,000	$ 10,500,000	$ 11,600,000
Aggregate Projected Benefit Obligation	183,200,000
Aggregate Accumulated Benefit Obligation	171,700,000
Aggregate Fair Value of Plan Assets	79,300,000
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	4,357,000	5,094,000	4,782,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	58,500,000	28,200,000
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	100,000
Defined Benefit Plan, Accumulated Benefit Obligation	146,500,000	125,300,000
Discount Rate	4.25%	5.25%	5.50%
Discount Rate	5.25%	5.50%	6.25%
Equity Securities, Range Minimum	30.00%
Equity Securities, Range Maximum	50.00%
Debt Securities, Range Minimum	15.00%
Debt Securities, Range Maximum	35.00%
Other, Range Minimum	25.00%
Other, Range Maximum	45.00%
Pension Contributions		5,000,000
Estimated Future Employer Contributions in Next Fiscal Year	7,400,000
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	3,651,000	5,764,000	10,848,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	100,300,000	96,600,000
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	4,700,000	4,500,000
Defined Benefit Plan, Accumulated Benefit Obligation	698,000,000	634,800,000
Discount Rate	3.10%	3.60%	3.90%
Discount Rate	3.60%	3.90%	3.95%
Equity Securities, Range Minimum	25.00%
Equity Securities, Range Maximum	45.00%
Debt Securities, Range Minimum	35.00%
Debt Securities, Range Maximum	55.00%
Other, Range Minimum	15.00%
Other, Range Maximum	25.00%
Estimated Future Employer Contributions in Next Fiscal Year	20,600,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	343,000	(354,000)	215,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	12,100,000	13,200,000
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	1,200,000	1,400,000
Discount Rate	4.25%	5.25%	5.50%
Discount Rate	5.25%	5.50%	6.25%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	9.00%
Healthcare Cost Trend Rate Minimum		7.50%	7.50%
Healthcare Cost Trend Rate Maximum		9.00%	10.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%
Estimated Future Employer Contributions in Next Fiscal Year	$ 1,100,000