Income And Deferred Taxes (Summary Of Tax Losses Carried Forward) (Detail)	12 Months Ended
	Dec. 31, 2011
Hungary [Member]
Operating Loss Carryforwards [Line Items]
Maximum number of years tax losses can be carried forward	Unrestricted period	[1]
United States [Member]
Operating Loss Carryforwards [Line Items]
Maximum number of years tax losses can be carried forward	20
Russia [Member]
Operating Loss Carryforwards [Line Items]
Maximum number of years tax losses can be carried forward	10
Poland [Member]
Operating Loss Carryforwards [Line Items]
Maximum number of years tax losses can be carried forward	5

[1] In some circumstances the Tax Office's permission to carry the loss forward is required.