Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011 German Tax Authority [Member]	Sep. 30, 2012 German Tax Authority [Member]	Sep. 30, 2012 German Tax Authority [Member] Minimum [Member]	Sep. 30, 2012 German Tax Authority [Member] Maximum [Member]	Sep. 30, 2012 Settlement of Tax Examination [Member]	Sep. 30, 2012 Elimination of Valuation Allowances on Certain Deferred Tax Assets [Member]
Income Taxes [Abstract]
Effective tax rate on continuing operations	35.40%	34.60%
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Estimated range of change, upper bound							$ 0	$ 14.0
Estimated range of change, lower bound							(2.0)	9.0
Unrecognized tax benefits				22.4
Income Tax Contingency [Line Items]
Years under examination					2000	2003
Payment to taxing authority to pursue litigation			$ 12.9