Income Taxes (Narrative) (Details)	12 Months Ended										12 Months Ended		3 Months Ended						12 Months Ended							12 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2011 2012 To 2031 [Member] USD ($)	Dec. 31, 2011 Indefinite [Member] USD ($)	Dec. 31, 2011 Other Liabilities [Member] USD ($)	Dec. 31, 2010 Other Liabilities [Member] USD ($)	Dec. 31, 2009 Other Liabilities [Member] USD ($)	Dec. 31, 2011 Other Current Liabilities [Member] USD ($)	Dec. 31, 2009 Other Current Liabilities [Member] USD ($)	Dec. 31, 2011 2002 - 2003 [Member] USD ($)	Dec. 31, 2011 2002 - 2003 [Member] EUR (€)	Dec. 31, 2011 2004 - 2006 [Member] USD ($)	Dec. 31, 2011 2004 - 2006 [Member] EUR (€)	Dec. 31, 2011 2004 - 2006 [Member] Bank Guarantees [Member] USD ($)	Dec. 31, 2011 2004 - 2006 [Member] Bank Guarantees [Member] EUR (€)	Dec. 31, 2011 2004 - 2006 [Member] Additional Bank Guarantees [Member] USD ($)	Dec. 31, 2011 2004 - 2006 [Member] Additional Bank Guarantees [Member] EUR (€)	Dec. 31, 2011 2007 - 2010 [Member]	Dec. 31, 2011 1995 - 2001 [Member] USD ($)	Dec. 31, 2011 1995 - 2001 [Member] EUR (€)	Dec. 31, 2011 1995 - 2001 [Member] Bank Guarantees [Member] USD ($)	Dec. 31, 2011 1995 - 2001 [Member] Bank Guarantees [Member] EUR (€)	Dec. 31, 2011 1995 - 2001 [Member] Additional Bank Guarantees [Member] USD ($)	Dec. 31, 2011 1995 - 2001 [Member] Additional Bank Guarantees [Member] EUR (€)	Dec. 31, 2011 2002 - 2010 [Member]	Dec. 31, 2011 Spanish Income Tax [Member] USD ($)
Income Taxes [Line Items]
U.S. federal tax rate	35.00%	35.00%	35.00%
Reversals of liabilities for uncertain tax positions	$ 5,000,000	$ 6,000,000
Unrecognized tax benefits that would impact effective tax rate						65,900,000	63,900,000	62,500,000	1,700,000	2,200,000
Income tax penalties and interest expense	2,000,000	1,000,000	2,000,000
Net operating loss carryforwards	175,000,000	168,000,000
Operating loss carryforwards	210,886,000	190,690,000		6,000,000	169,000,000
Operating loss carryforwards, expiration date	2012 and 2031
Tax credit carryforwards	36,000,000	23,000,000
Deferred tax assets deferred income	182,600,000
Tax credits established against deferred tax assets	7,000,000
Valuation allowance for net operating loss carryforwards	169,000,000
Valuation allowance established against certain other net deferred tax assets	115,000,000
Percentage of foreign dividend	100.00%
Tax benefits credited to Shareholders' equity	2,000,000	3,000,000
Undistributed earnings of foreign subsidiaries	924,000,000
Accrued interest and penalties	12,800,000	11,000,000	10,000,000
Income tax examination, years under examination											2002-2003	2002-2003	2004-2006	2004-2006					2007-2010	1995-2001	1995-2001					2002 to 2010
Number of dividend withholding tax controversies	4
Assessment imposed											29,900,000	23,100,000	79,600,000	61,600,000						23,400,000	18,100,000
Bank guarantees needed to be posted to proceed with tax appeals															39,900,000	30,900,000	79,600,000	61,600,000				21,900,000	17,000,000	15,900,000	12,300,000
Provision for uncertain tax positions	$ 80,400,000																										$ 49,600,000