2.4.0.82407401 - Disclosure - Guarantees (Details)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$I2013Q2http://www.sec.gov/CIK0000764764instant2013-06-30T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$I2012Q4http://www.sec.gov/CIK0000764764instant2012-12-31T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1us-gaap_GuaranteesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Guarantees [Abstract]2false 2us-gaap_GuaranteeObligationsCurrentCarryingValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse20000002USD$falsetruefalse2truefalsefalse20000002USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Related liability3false 2us-gaap_GuaranteeObligationsMaximumExposureus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4700000047falsefalsefalse2truefalsefalse6100000061falsefalsefalsexbrli:monetaryItemTypemonetaryMaximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 false2Guarantees, maximum potential amount of future payments4false 2cfsc_FinancialSpecialPurposeCompanyVariableInterestEntityConsolidatedCarryingAmountAssetscfsc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse889000000889falsefalsefalse2truefalsefalse927000000927falsefalsefalsexbrli:monetaryItemTypemonetaryThe carrying amount of the consolidated Special-Purpose Company's assets included in the reporting entity's statement of financial position.No definition available.false2SPC's assets in Consolidated Statements of Financial Position5false 2cfsc_FinancialSpecialPurposeCompanyVariableInterestEntityConsolidatedCarryingAmountLiabilitiescfsc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse889000000889USD$falsetruefalse2truefalsefalse927000000927USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe carrying amount of the consolidated Special-Purpose Company's liabilities included in the reporting entity's statement of financial position.No definition available.false2SPC's liabilities in Consolidated Statements of Financial PositionfalseGuarantees (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://finance.cat.com/role/GuaranteesDetails25