Income Taxes (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes (Textual) [Abstract]
Gross unrecognized tax benefits including interest and penalties	$ 52.5	$ 48.4	$ 47.0	$ 46.5
Accrued potential interest related to unrecognized tax benefits	2.0
Recorded liabilities for potential penalties	0.4	0	0
Recorded liabilities for potential interest	4.8	1.9	1.6
Reversed liability due to expiration of statute of limitations	2.5	2.3	1.2
Unrecognized tax benefits to be decreased in next 12 months due to statute of limitation expirations	25.4
Valuation allowance related to foreign net operating losses	28.4
State net operating loss carryforwards available to reduce future taxable income	88.6
Year that operating loss carryforward expires	2014
Foreign net operating loss carryforwards that do not expire	106.5
State operating loss carryforward	8.8
Federal tax credits carryover	3.5
State tax credits carryover	22.9
Year that Federal tax credits expire	2029
Federal income taxes not provided on undistributed earnings of non-U.S. subsidiaries	36.2
Tax savings due to reduction in tax rate	$ 0.7	$ 0.9	$ 0.4
Increase in diluted earnings per share	$ 0.006	$ 0.009	$ 0.005
Additional period for renewal for investment and employment in foreign country	5 years