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These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalse7false0cat_ImpairedLoansAndLeasesReceivableRecordedInvestmentcatfalsedebitinstantThe recorded investment related to impaired impaired loans and finance leases.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse513000000513falsetruefalsefalsefalse3truefalsefalse479000000479falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe recorded investment related to impaired impaired loans and finance leases.No authoritative reference available.falsefalse8false0cat_ImpairedLoansAndLeasesReceivableRelatedAllowancecatfalsecreditinstantAmount of allowance for credit losses related to impaired loans and finance 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Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets.No authoritative reference available.truefalse269false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.cat.com/role/disclosurecatfinancialfinancingactivitiesdetails31falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse32falsefalseUSDtruefalse{cat_ImpairedFinancingReceivableAxis} : Latin America 12/31/2010 USD ($) $I2010_LatinAmericaMemberhttp://www.sec.gov/CIK0000018230instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseLatin Americacat_ImpairedFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldicat_LatinAmericaMembercat_ImpairedFinancingReceivableAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse272true0cat_FinancingReceivableRecordedInvestmentPastDueAbstractcatfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse273false0cat_FinancingReceivablecatfalsedebitinstantThe amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates...falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse28830000002883falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets.No authoritative reference available.truefalse274false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.cat.com/role/disclosurecatfinancialfinancingactivitiesdetails31falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse33falsefalseUSDtruefalse{cat_ImpairedFinancingReceivableAxis} : Global Power Finance 12/31/2010 USD ($) $I2010_GlobalPowerFinanceMemberhttp://www.sec.gov/CIK0000018230instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseGlobal Power Financecat_ImpairedFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldicat_GlobalPowerFinanceMembercat_ImpairedFinancingReceivableAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse277true0cat_FinancingReceivableRecordedInvestmentPastDueAbstractcatfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse278false0cat_FinancingReceivablecatfalsedebitinstantThe amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates...falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse30700000003070falsetruefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. 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