2.2.0.25truefalse40600 - Disclosure - Acquisitions (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $FROM_Jan01_2010_TO_Dec31_2010http://www.sec.gov/CIK0001000697duration2010-01-01T00:00:002010-12-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalsetruefalse{us-gaap_BusinessAcquisitionAxis} : Thar Instruments [Member] 1/1/2010 - 12/31/2010 FROM_Jan01_2010_TO_Dec31_2010_us-gaap_BusinessAcquisitionAxis_TharInstrumentsMemberhttp://www.sec.gov/CIK0001000697duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseThar Instruments [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwat_TharInstrumentsMemberus-gaap_BusinessAcquisitionAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli03falsefalseUSDtruefalse{us-gaap_BusinessAcquisitionAxis} : Thar Instruments [Member] 2/2/2009 USD ($) $AS_OF_Feb02_2009_us-gaap_BusinessAcquisitionAxis_TharInstrumentsMemberhttp://www.sec.gov/CIK0001000697instant2009-02-02T00:00:000001-01-01T00:00:00falsefalseThar Instruments [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwat_TharInstrumentsMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalsetruefalse{us-gaap_BusinessAcquisitionAxis} : APG [Member] 1/1/2010 - 12/31/2010 FROM_Jan01_2010_TO_Dec31_2010_us-gaap_BusinessAcquisitionAxis_ApgMemberhttp://www.sec.gov/CIK0001000697duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAPG [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwat_ApgMemberus-gaap_BusinessAcquisitionAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli05falsefalseUSDtruefalse{us-gaap_BusinessAcquisitionAxis} : APG [Member] 12/5/2008 USD ($) $AS_OF_Dec05_2008_us-gaap_BusinessAcquisitionAxis_ApgMemberhttp://www.sec.gov/CIK0001000697instant2008-12-05T00:00:000001-01-01T00:00:00falsefalseAPG [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwat_ApgMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalsetruefalse{us-gaap_BusinessAcquisitionAxis} : VTI [Member] 1/1/2010 - 12/31/2010 FROM_Jan01_2010_TO_Dec31_2010_us-gaap_BusinessAcquisitionAxis_VtiMemberhttp://www.sec.gov/CIK0001000697duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseVTI [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwat_VtiMemberus-gaap_BusinessAcquisitionAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli07falsefalseUSDtruefalse{us-gaap_BusinessAcquisitionAxis} : VTI [Member] 7/21/2008 USD ($) $AS_OF_Jul21_2008_us-gaap_BusinessAcquisitionAxis_VtiMemberhttp://www.sec.gov/CIK0001000697instant2008-07-21T00:00:000001-01-01T00:00:00falsefalseVTI [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwat_VtiMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2true0us-gaap_BusinessAcquisitionLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. 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