2.0.0.10 true Consolidated Statements of Changes in Equity (JPY ¥) 107 - Statement - Consolidated Statements of Changes in Equity true false In Millions false false 1 usd ¥ true false false false us-gaap_CommonStockMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CommonStockMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 2 usd ¥ true false false false us-gaap_AdditionalPaidInCapitalMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AdditionalPaidInCapitalMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 3 usd ¥ true false false false us-gaap_OtherAdditionalCapitalMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherAdditionalCapitalMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 4 usd ¥ true false false false us-gaap_RetainedEarningsMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_RetainedEarningsMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 5 usd ¥ true false false false us-gaap_AccumulatedOtherComprehensiveIncomeMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AccumulatedOtherComprehensiveIncomeMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 6 usd ¥ true false false false us-gaap_TreasuryStockMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_TreasuryStockMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 7 usd ¥ true false false false us-gaap_NoncontrollingInterestMember us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_NoncontrollingInterestMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 false 8 usd ¥ false false iso4217_JPY Standard http://www.xbrl.org/2003/iso4217 JPY iso4217 0 iso4217_JPY_per_shares Divide http://www.xbrl.org/2003/iso4217 JPY iso4217 http://www.xbrl.org/2003/instance shares 0 shares Standard http://www.xbrl.org/2003/instance shares 0 5 Beginning Balance at Mar. 31, 2007 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false false true false false periodstartlabel false 1 true true false false 84070000000 84070 true false false 2 true true false false 93150000000 93150 true false false 3 true true false false 19539000000 19539 true false false 4 true true false false 376815000000 376815 true false false 5 true true false false 86247000000 86247 true false false 6 true true false false -184000000 -184 true false false 7 true true false false 36069000000 36069 true false false 8 true true false false 695706000000 695706 false false false Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 6 Cumulative effect of adopting accounting for uncertainty in income taxes 3 us-gaap_CumulativeEffectOfInitialAdoptionOfFIN48 us-gaap true credit duration monetary No definition available. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 261000000 261 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false 261000000 261 false false false Cumulative net-of-tax effect of initial adoption of FIN 48 - Accounting for Uncertainty in Income Taxes on the opening balance of retained earnings. The cumulative-effect adjustment does not include items that would not be recognized in earnings, such as the effect of adopting this Interpretation on tax positions related to business combinations. The amount of that cumulative-effect adjustment is the difference between the net amount of assets and liabilities recognized in the statement of financial position prior to the application of this Interpretation and the net amount of assets and liabilities recognized as a result of applying the provisions of this Interpretation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 23, 24 false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 68026000000 68026 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 6790000000 6790 true false false 8 false true false false 74816000000 74816 false false false The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 8 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false -55070000000 -55070 true false false 6 false false false false 0 0 true false false 7 false true false false 1137000000 1137 true false false 8 false true false false -53933000000 -53933 false false false This element represents Other Comprehensive Income (Loss), Net of Tax, for the period. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 22, 23, 24, 25 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 9 Cash dividends paid to Kubota Corporation shareholders, 14 Yen, 15 Yen, and 13 Yen in 2010, 2009 and 2008, per common share, respectively 3 us-gaap_DividendsCommonStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false -16777000000 -16777 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false -16777000000 -16777 false false false Common stock cash dividend declared by an entity during the period. This element includes paid and unpaid dividends declared during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 10 Cash dividends paid to noncontriolling interests 3 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap true debit duration monetary No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false -1681000000 -1681 true false false 8 false true false false -1681000000 -1681 false false false Decrease in noncontrolling interest balance from payment of dividends or other distributions to noncontrolling interest holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(2) false 11 Purchases and sales of treasury stock (less 216, 8,541 and 10,909 in 2010, 2009 and 2008, thousands of shares, respectively) 3 kub_TreasuryStockValueNetAcquiredReissued kub false debit duration monetary Net value of common stock that was acquired or reissued during the period. Recorded using the cost method. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false -7980000000 -7980 true false false 7 false false false false 0 0 true false false 8 false true false false -7980000000 -7980 false false false Net value of common stock that was acquired or reissued during the period. Recorded using the cost method. No authoritative reference available. false 12 Retirement of treasury stock 3 us-gaap_TreasuryStockValueRetiredCostMethod us-gaap true credit duration monetary No definition available. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false -4398000000 -4398 true false false 5 false false false false 0 0 true false false 6 false true false false 4398000000 4398 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false Value of common and preferred stock retired from treasury during the period. This element is used only when Treasury Stock is accounted for at total cost versus par. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 13 Increase in noncontrolling interests related to contribution 3 kub_IncreaseInNoncontrollingInterestRelatedToContribution kub false na duration monetary Increase in noncontrolling interests due to investments to subsidiaries from noncontrolling interest holders . false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 1482000000 1482 true false false 8 false true false false 1482000000 1482 false false false Increase in noncontrolling interests due to investments to subsidiaries from noncontrolling interest holders . No authoritative reference available. false 14 Changes in ownership interests in subsidiaries 3 kub_ChangesInOwnershipInterestsInSubsidiaries kub false credit duration monetary This element represents the effect of any changes in a parent's ownership interest in a subsidiary except net income (loss),... false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false -567000000 -567 true false false 8 false true false false -567000000 -567 false false false This element represents the effect of any changes in a parent's ownership interest in a subsidiary except net income (loss), comprehensive income (loss), dividends in and contributions to the subsidiaries. No authoritative reference available. false 15 Ending Balance at Mar. 31, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false false false true false periodendlabel false 1 false true false false 84070000000 84070 true false false 2 false true false false 93150000000 93150 true false false 3 false true false false 19539000000 19539 true false false 4 false true false false 423927000000 423927 true false false 5 false true false false 31177000000 31177 true false false 6 false true false false -3766000000 -3766 true false false 7 false true false false 43230000000 43230 true false false 8 false true false false 691327000000 691327 false false false Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 48064000000 48064 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 6671000000 6671 true false false 8 false true false false 54735000000 54735 false false false The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 8 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false -93361000000 -93361 true false false 6 false false false false 0 0 true false false 7 false true false false -10211000000 -10211 true false false 8 false true false false -103572000000 -103572 false false false This element represents Other Comprehensive Income (Loss), Net of Tax, for the period. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 22, 23, 24, 25 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 9 Cash dividends paid to Kubota Corporation shareholders, 14 Yen, 15 Yen, and 13 Yen in 2010, 2009 and 2008, per common share, respectively 3 us-gaap_DividendsCommonStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false -19193000000 -19193 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false -19193000000 -19193 false false false Common stock cash dividend declared by an entity during the period. This element includes paid and unpaid dividends declared during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 10 Cash dividends paid to noncontriolling interests 3 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap true debit duration monetary No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false -767000000 -767 true false false 8 false true false false -767000000 -767 false false false Decrease in noncontrolling interest balance from payment of dividends or other distributions to noncontrolling interest holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(2) false 11 Purchases and sales of treasury stock (less 216, 8,541 and 10,909 in 2010, 2009 and 2008, thousands of shares, respectively) 3 kub_TreasuryStockValueNetAcquiredReissued kub false debit duration monetary Net value of common stock that was acquired or reissued during the period. Recorded using the cost method. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false -7000000 -7 true false false 5 false false false false 0 0 true false false 6 false true false false -5316000000 -5316 true false false 7 false false false false 0 0 true false false 8 false true false false -5323000000 -5323 false false false Net value of common stock that was acquired or reissued during the period. Recorded using the cost method. No authoritative reference available. false 13 Increase in noncontrolling interests related to contribution 3 kub_IncreaseInNoncontrollingInterestRelatedToContribution kub false na duration monetary Increase in noncontrolling interests due to investments to subsidiaries from noncontrolling interest holders . false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 14000000 14 true false false 8 false true false false 14000000 14 false false false Increase in noncontrolling interests due to investments to subsidiaries from noncontrolling interest holders . No authoritative reference available. false 14 Changes in ownership interests in subsidiaries 3 kub_ChangesInOwnershipInterestsInSubsidiaries kub false credit duration monetary This element represents the effect of any changes in a parent's ownership interest in a subsidiary except net income (loss),... false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false -978000000 -978 true false false 8 false true false false -978000000 -978 false false false This element represents the effect of any changes in a parent's ownership interest in a subsidiary except net income (loss), comprehensive income (loss), dividends in and contributions to the subsidiaries. No authoritative reference available. false 15 Ending Balance at Mar. 31, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false false false true false periodendlabel false 1 false true false false 84070000000 84070 true false false 2 false true false false 93150000000 93150 true false false 3 false true false false 19539000000 19539 true false false 4 false true false false 452791000000 452791 true false false 5 false true false false -62184000000 -62184 true false false 6 false true false false -9082000000 -9082 true false false 7 false true false false 37959000000 37959 true false false 8 false true false false 616243000000 616243 false false false Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 42326000000 42326 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 5582000000 5582 true false false 8 false true false false 47908000000 47908 false false false The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 8 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false 28429000000 28429 true false false 6 false false false false 0 0 true false false 7 false true false false 1946000000 1946 true false false 8 false true false false 30375000000 30375 false false false This element represents Other Comprehensive Income (Loss), Net of Tax, for the period. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 22, 23, 24, 25 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 9 Cash dividends paid to Kubota Corporation shareholders, 14 Yen, 15 Yen, and 13 Yen in 2010, 2009 and 2008, per common share, respectively 3 us-gaap_DividendsCommonStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false -17814000000 -17814 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false -17814000000 -17814 false false false Common stock cash dividend declared by an entity during the period. This element includes paid and unpaid dividends declared during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 10 Cash dividends paid to noncontriolling interests 3 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap true debit duration monetary No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false -489000000 -489 true false false 8 false true false false -489000000 -489 false false false Decrease in noncontrolling interest balance from payment of dividends or other distributions to noncontrolling interest holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(2) false 11 Purchases and sales of treasury stock (less 216, 8,541 and 10,909 in 2010, 2009 and 2008, thousands of shares, respectively) 3 kub_TreasuryStockValueNetAcquiredReissued kub false debit duration monetary Net value of common stock that was acquired or reissued during the period. Recorded using the cost method. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false -183000000 -183 true false false 7 false false false false 0 0 true false false 8 false true false false -183000000 -183 false false false Net value of common stock that was acquired or reissued during the period. Recorded using the cost method. No authoritative reference available. false 13 Increase in noncontrolling interests related to contribution 3 kub_IncreaseInNoncontrollingInterestRelatedToContribution kub false na duration monetary Increase in noncontrolling interests due to investments to subsidiaries from noncontrolling interest holders . false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 2109000000 2109 true false false 8 false true false false 2109000000 2109 false false false Increase in noncontrolling interests due to investments to subsidiaries from noncontrolling interest holders . No authoritative reference available. false 14 Changes in ownership interests in subsidiaries 3 kub_ChangesInOwnershipInterestsInSubsidiaries kub false credit duration monetary This element represents the effect of any changes in a parent's ownership interest in a subsidiary except net income (loss),... false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false true false false -3909000000 -3909 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false -736000000 -736 true false false 6 false false false false 0 0 true false false 7 false true false false -1885000000 -1885 true false false 8 false true false false -6530000000 -6530 false false false This element represents the effect of any changes in a parent's ownership interest in a subsidiary except net income (loss), comprehensive income (loss), dividends in and contributions to the subsidiaries. No authoritative reference available. false 15 Ending Balance at Mar. 31, 2010 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false false false true false periodendlabel false 1 true true false false 84070000000 84070 true false false 2 true true false false 89241000000 89241 true false false 3 true true false false 19539000000 19539 true false false 4 true true false false 477303000000 477303 true false false 5 true true false false -34491000000 -34491 true false false 6 true true false false -9265000000 -9265 true false false 7 true true false false 45222000000 45222 true false false 8 true true false false 671619000000 671619 false false false Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false false 8 27 false Millions UnKnown UnKnown false true