2.2.0.25falsefalse06121 - Disclosure - Income Taxes (Details 1)truefalseIn Millionsfalse1falsefalseJPYfalsefalse12/31/2010 JPY (¥) ¥BalanceAsOf_31Dec2010http://www.sec.gov/CIK0000016988instant2010-12-31T00:00:000001-01-01T00:00:00JPYStandardhttp://www.xbrl.org/2003/iso4217JPYiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0JPYJPY¥2falsefalseJPYfalsefalse12/31/2009 JPY (¥) ¥BalanceAsOf_31Dec2009http://www.sec.gov/CIK0000016988instant2009-12-31T00:00:000001-01-01T00:00:00JPYStandardhttp://www.xbrl.org/2003/iso4217JPYiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0JPYJPY¥3true0us-gaap_DeferredTaxAssetsLiabilitiesNetAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseNet deferred income tax assets and liabilities4false0caj_DeferredTaxAssetsPrepaidExpensesAndOtherCurrentAssetscajfalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse6919700000069197falsetruefalsefalsefalse2truefalsefalse9479800000094798falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalsePrepaid expenses and other current assets5false0caj_DeferredIncomeTaxOtherNonCurrentAssetcajfalsedebitinstantDeferred Income Tax Other Non Current Asset.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse136727000000136727falsefalsefalsefalsefalse2truefalsefalse117263000000117263falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDeferred Income Tax Other Non Current Asset.No authoritative reference available.falsefalseOther assets6false0us-gaap_DeferredTaxLiabilitiesCurrentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-2149000000-2149falsefalsefalsefalsefalse2truefalsefalse-2018000000-2018falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the current portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A current taxable temporary difference is a difference between the tax basis and the carrying amount of a current asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise shall separate deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets shall be classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, shall be classified according to the expected reversal date of the temporary difference.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 41, 42, 43 falsefalseOther current liabilities7false0us-gaap_DeferredTaxLiabilitiesNoncurrentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-47827000000-47827falsefalsefalsefalsefalse2truefalsefalse-36278000000-36278falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise shall separate deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets shall be classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, shall be classified according to the expected reversal date of the temporary difference.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 41, 42 truefalseOther noncurrent liabilities8false0us-gaap_DeferredTaxAssetsLiabilitiesNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse155948000000155948falsefalsefalsefalsefalse2truefalsefalse173765000000173765falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseNet deferred tax assets10true0us-gaap_DeferredTaxAssetsNetAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDeferred tax assets:11false0us-gaap_DeferredTaxAssetsInventoryus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse2383600000023836falsefalsefalsefalsefalse2truefalsefalse2412100000024121falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to inventory related items which can only be realized if sufficient taxable income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseInventories12false0caj_DeferredTaxAssetsAccruedBusinessTaxcajfalsedebitinstantDeferred tax assets accrued business tax.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse62000000006200falsefalsefalsefalsefalse2truefalsefalse38610000003861falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDeferred tax assets accrued business tax.No authoritative reference available.falsefalseAccrued business tax13false0caj_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionAndSeverancePaymentscajfalsedebitinstantDeferred tax assets tax deferred expense compensation and benefits pension and severance payments.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse7855200000078552falsefalsefalsefalsefalse2truefalsefalse5263900000052639falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDeferred tax assets tax deferred expense compensation and benefits pension and severance payments.No authoritative reference available.falsefalseAccrued pension and severance cost14false0caj_ResearchAndDevelopmentCostsCapitalizedForTaxPurposescajfalsedebitinstantResearch and development costs capitalized for tax purposes.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse1474000000014740falsefalsefalsefalsefalse2truefalsefalse4571800000045718falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryResearch and development costs capitalized for tax purposes.No authoritative reference available.falsefalseResearch and development - 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Includes any tax benefit realized in deferred tax assets for significant impacts of tax planning strategies.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 289 falsefalseDeferred tax assets, gross20false0us-gaap_DeferredTaxAssetsValuationAllowanceus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegatedtotal1truefalsefalse-35307000000-35307falsefalsefalsefalsefalse2truefalsefalse-22188000000-22188falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 17 -Subparagraph e Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43-49 truefalseLess valuation allowance21false0us-gaap_DeferredTaxAssetsNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse246823000000246823falsefalsefalsefalsefalse2truefalsefalse243585000000243585falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 falsefalseTotal deferred tax assets22true0us-gaap_DeferredTaxLiabilitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDeferred tax liabilities:23false0us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarningsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-8215000000-8215falsefalsefalsefalsefalse2truefalsefalse-8023000000-8023falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to undistributed earnings of subsidiaries and other recognized entities in countries outside the country of domicile which will increase future taxable income when such earnings are distributed into the country of domicile.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph a falsefalseUndistributed earnings of foreign subsidiaries24false0caj_NetUnrealizedGainsOnSecuritiescajfalsecreditinstantNet unrealized gains on securities.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-2119000000-2119falsefalsefalsefalsefalse2truefalsefalse-2052000000-2052falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNet unrealized gains on securities.No authoritative reference available.falsefalseNet unrealized gains on securities25false0caj_DeferredTaxLiabilitiesTaxDeductibleReservecajfalsecreditinstantDeferred tax liabilities tax deductible reserve.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-6038000000-6038falsefalsefalsefalsefalse2truefalsefalse-7797000000-7797falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDeferred tax liabilities tax deductible reserve.No authoritative reference available.falsefalseTax deductible reserve26false0caj_DeferredTaxLiabilitiesFinancingLeaseRevenuecajfalsecreditinstantDeferred tax liabilities financing lease revenue.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-37353000000-37353falsefalsefalsefalsefalse2truefalsefalse-35505000000-35505falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDeferred tax liabilities financing lease revenue.No authoritative reference available.falsefalseFinancing lease revenue27false0us-gaap_DeferredTaxLiabilitiesPrepaidPensionCostsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-2018000000-2018falsefalsefalsefalsefalse2truefalsefalse-314000000-314falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of pension liabilities funded in advance and the basis of a prepaid pension asset determined in accordance with generally accepted accounting principles. The difference in basis of such costs will increase future taxable income when such basis difference reverses. (Prepaid pension costs represented the cumulative employer's contributions in excess of net pension cost recognized, before the adoption of the recognition provisions of FAS 158. 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A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseTotal deferred tax liabilities30false0us-gaap_DeferredTaxAssetsLiabilitiesNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse155948000000155948falsetruefalsefalsefalse2truefalsefalse173765000000173765falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseNet deferred tax assets227Income Taxes (Details 1) (JPY ¥)MillionsUnKnownUnKnownUnKnownfalsetrue