Income Taxes (Details Textual)	1 Months Ended		6 Months Ended
	Dec. 31, 2009 USD ($)	Dec. 31, 2009 EUR (€)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Dec. 31, 2010 USD ($)	Jun. 30, 2011 Internal Revenue Service (IRS) [Member] 2007 Federal Tax Return [Member] USD ($)	Jun. 30, 2011 Internal Revenue Service (IRS) [Member] 2008 Federal Tax Return [Member] USD ($)	Jun. 30, 2011 Foreign Country [Member] EUR (€)
Additional Income Taxes (Textuals) [Abstract]
Contingent taxes payable						$ 16,000,000	$ 14,000,000
Noncurrent receivable - foreign tax payment								62,800,000
Income Taxes (Textuals) [Abstract]
Range of reasonably possible estimated tax benefits to be recognized during the next 12 months, Minimum			6,000,000
Range of reasonably possible estimated tax benefits to be recognized during the next 12 months, Maximum			11,000,000
Effective tax rate			16.70%	12.90%
Payment of income tax, including interest, on assessment	90,000,000	62,800,000
Interest on income tax assessment		5,700,000
Foreign deferred tax asset (approx)			1,300,000,000		1,100,000,000
Foreign deferred tax asset - Valuation allowance			1,300,000,000		1,100,000,000
Unrecognized gross tax benefits			19,500,000
Unrecognized tax benefits if recognized that would impact the effective tax rate			14,600,000
Reduction in income tax expense for discrete items			$ 9,700,000	$ 40,800,000
Effective tax rate after excluding impact of discrete items			19.20%	20.20%