2.2.0.25truefalse40404 - Disclosure - Goodwill and Other Intangible Assets (Narrative) (Details)truefalseIn Thousandsfalse1falsefalseUSDfalsefalse3/31/2011 USD ($) $As_Of_3_31_2011http://www.sec.gov/CIK0001130385instant2011-03-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse12/31/2010 USD ($) $As_Of_12_31_2010http://www.sec.gov/CIK0001130385instant2010-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDtruefalse{us-gaap_StatementBusinessSegmentsAxis} : Global E and C Group [Member] 1/1/2010 - 3/31/2010 USD ($) $Duration_1_1_2010_To_3_31_2010_us-gaap_StatementBusinessSegmentsAxis_fwlt_GlobalEAndCGroupMemberhttp://www.sec.gov/CIK0001130385duration2010-01-01T00:00:002010-03-31T00:00:00falsefalseGlobal E and C Group [Member]us-gaap_StatementBusinessSegmentsAxisxbrldihttp://xbrl.org/2006/xbrldifwlt_GlobalEAndCGroupMemberus-gaap_StatementBusinessSegmentsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDtruefalse{us-gaap_StatementBusinessSegmentsAxis} : Global E and C Group [Member] 3/31/2011 USD ($) $As_Of_3_31_2011_us-gaap_StatementBusinessSegmentsAxis_fwlt_GlobalEAndCGroupMemberhttp://www.sec.gov/CIK0001130385instant2011-03-31T00:00:000001-01-01T00:00:00falsefalseGlobal E and C Group [Member]us-gaap_StatementBusinessSegmentsAxisxbrldihttp://xbrl.org/2006/xbrldifwlt_GlobalEAndCGroupMemberus-gaap_StatementBusinessSegmentsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDtruefalse{us-gaap_StatementBusinessSegmentsAxis} : Global Power Group [Member] 3/31/2011 USD ($) $As_Of_3_31_2011_us-gaap_StatementBusinessSegmentsAxis_fwlt_GlobalPowerGroupMemberhttp://www.sec.gov/CIK0001130385instant2011-03-31T00:00:000001-01-01T00:00:00falsefalseGlobal Power Group [Member]us-gaap_StatementBusinessSegmentsAxisxbrldihttp://xbrl.org/2006/xbrldifwlt_GlobalPowerGroupMemberus-gaap_StatementBusinessSegmentsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false0us-gaap_FiniteLivedIntangibleAssetsNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse6530300065303falsetruefalsefalsefalse2truefalsefalse6607000066070falsetruefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4truefalsefalse1670600016706falsetruefalsetruefalse5truefalsefalse4859700048597falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) falsefalseTotal identifiable intangible assets - net carrying amount3false0us-gaap_GoodwillAcquiredDuringPeriodus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse12210001221falsetruefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e(1) falsefalseGoodwill acquired during the year52Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)ThousandsUnKnownUnKnownUnKnownfalsetrue