Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes (Textual) [Abstract]
Cumulative amount of undistributed earning of foreign subsidiaries	$ 505.7
U.S. federal tax net operating loss carryforward	38.1	14.8
Alternative minimum tax credit	8.9	11.5
Foreign tax credits	13.9	16.9
Foreign tax credits valuation allowance	13.9	16.9
State net operating loss	31.1	28.2
State net operating loss carryforwards valuation allowance	15.8	15.8
Foreign tax net operating loss	7.3	4.7
Unrecognized domestic tax benefits	15.5
Unrecognized foreign tax benefits	0.4
Estimated time period for recognition of unrecognized taxes	within the next 12 months.
Reduction in unrecognized tax benefits with the close of various federal and foreign tax audits	21.9	14.7
Gross liability for unrecognized tax benefits	20.8	42.7	54.8
Decrease in income tax expenses unrecognized tax benefits if recognized	20.8
Decrease in income tax expenses unrecognized tax benefits if recognized net of federal tax	18.8	21.3
Favorable tax adjustment from reduction in tax rates	(4.1)	(1.9)	(1.4)
Impact of other tax issues	(4.8)	(9.5)
Expires After 2030 [Member] | Domestic Country [Member]
Operating Loss Carryforwards [Line Items]
Amount of U.S. federal tax net operating loss	42.3
Expires After 2031 [Member] | Domestic Country [Member]
Operating Loss Carryforwards [Line Items]
Amount of U.S. federal tax net operating loss	$ 66.5