Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Settlement of Tax Examination [Member]	Dec. 31, 2011 German Tax Authority [Member]	Jun. 30, 2012 German Tax Authority [Member]	Jun. 30, 2012 German Tax Authority [Member] Minimum [Member]	Jun. 30, 2012 German Tax Authority [Member] Maximum [Member]
Income Taxes [Abstract]
Effective tax rate on continuing operations	26.50%	33.60%
Estimated range of change, upper bound	$ 0
Estimated range of change, lower bound	(5.7)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits					22.7
Years under examination						2000	2003
Payment to taxing authority to pursue litigation				12.7
Amount of reasonably possible benefit			$ 8.7