2.0.0.10 false Consolidated Statements of Cash Flows (JPY ¥) 109 - Statement - Consolidated Statements of Cash Flows true false In Millions false false 1 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 false 2 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 false 3 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 Operating activities: 3 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income. false 6 Net income 4 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 true true false false 47908000000 47908 false false false 2 true true false false 54735000000 54735 false false false 3 true 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 7 Adjustments to reconcile net income to net cash provided by (used in) operating activities: 4 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false No definition available. false 8 Depreciation and amortization 5 us-gaap_DepreciationDepletionAndAmortization us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 29171000000 29171 false false false 2 false true false false 31242000000 31242 false false false 3 false true false false 30565000000 30565 false false false The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. No authoritative reference available. false 9 (Gain) loss on sales of securities-net 5 us-gaap_GainLossOnSaleOfSecuritiesNet us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -1821000000 -1821 false false false 2 false true false false 116000000 116 false false false 3 false true false false -704000000 -704 false false false The net gain or loss realized from the sale, exchange, redemption, or retirement of securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Subparagraph h -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Article 7 false 10 Valuation loss on other investments 5 us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 143000000 143 false false false 2 false true false false 8618000000 8618 false false false 3 false true false false 6715000000 6715 false false false This element represents the amount of loss recognized for other than temporary impairments of investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 16 false 11 (Gain) loss from disposal of fixed assets-net 5 us-gaap_GainLossOnSaleOfPropertyPlantEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false 118000000 118 false false false 2 false true false false -151000000 -151 false false false 3 false true false false 925000000 925 false false false The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 12 Equity in net income of affiliated companies 5 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -402000000 -402 false false false 2 false true false false -222000000 -222 false false false 3 false true false false -94000000 -94 false false false This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b false 13 Deferred income taxes 5 us-gaap_DeferredIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false false false terselabel false 1 false true false false -2563000000 -2563 false false false 2 false true false false 5109000000 5109 false false false 3 false true false false 4115000000 4115 false false false The component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 false 14 Change in assets and liabilities: 5 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration string No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false No definition available. false 15 (Increase) decrease in notes and accounts receivable 6 us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false 20380000000 20380 false false false 2 false true false false -128586000000 -128586 false false false 3 false true false false 31750000000 31750 false false false The net change during the reporting period of the sum of amounts due within one year (or one business cycle) from customers for the credit sale of goods and services; and from note holders for outstanding loans. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 16 (Increase) decrease in inventories 6 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false 38802000000 38802 false false false 2 false true false false -35636000000 -35636 false false false 3 false true false false -6656000000 -6656 false false false The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 17 (Increase) decrease in interest in sold receivables 6 us-gaap_IncreaseDecreaseInAccountsReceivableFromSecuritization us-gaap true credit 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 false false false 2 false true false false 70132000000 70132 false false false 3 false true false false -6763000000 -6763 false false false The net change during the reporting period in the amount owed to the reporting entity by counterparties in securitized loan transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 18 (Increase) decrease in other current assets 6 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false 1205000000 1205 false false false 2 false true false false -21322000000 -21322 false false false 3 false true false false -13309000000 -13309 false false false The net change during the reporting period in other operating assets not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 19 Decrease in trade notes and accounts payable 6 kub_IncreaseDecreaseInNotesPayableAndAccountsPayableTrade kub false debit duration monetary The net change during the reporting period of the sum of obligations due within one year (or one business cycle) arisen from... false false false false false false false false false false false false 1 false true false false -22780000000 -22780 false false false 2 false true false false -19771000000 -19771 false false false 3 false true false false -23311000000 -23311 false false false The net change during the reporting period of the sum of obligations due within one year (or one business cycle) arisen from the acquisition of merchandise, materials, supplies and services used in the production and sale of goods and services; and evidenced by formal promissory notes. No authoritative reference available. false 20 Increase (decrease) in income taxes payable 6 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 18005000000 18005 false false false 2 false true false false -7008000000 -7008 false false false 3 false true false false -10842000000 -10842 false false false The net change during the period in the amount of cash payments due to taxing authorities for taxes that are based on the reporting entity's earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 21 Increase (decrease) in other current liabilities 6 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false -9896000000 -9896 false false false 2 false true false false 28727000000 28727 false false false 3 false true false false 7539000000 7539 false false false The net change during the reporting period in other operating obligations not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 22 Increase (decrease) in accrued retirement and pension costs 6 us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 467000000 467 false false false 2 false true false false -10054000000 -10054 false false false 3 false true false false -10998000000 -10998 false false false The net change during the reporting period in the amount due to fund pension and non-pension benefits to employees, retired and disabled former employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 23 Other 5 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false 335000000 335 false false false 2 false true false false 1494000000 1494 false false false 3 false true false false 6362000000 6362 false false false For entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 24 Net cash provided by (used in) operating activities 4 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false false false totallabel false 1 false true false false 119072000000 119072 false false false 2 false true false false -22577000000 -22577 false false false 3 false true false false 90110000000 90110 false false false The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 25 Investing activities: 3 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false No definition available. false 26 Purchases of fixed assets 4 us-gaap_PaymentsToAcquireProductiveAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -26621000000 -26621 false false false 2 false true false false -32959000000 -32959 false false false 3 false true false false -35735000000 -35735 false false false The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c false 27 Purchases of investments and change in loan receivables 4 kub_PaymentsToAcquireInvestmentsAndIncreaseDecreaseInLoanReceivables kub false credit duration monetary The cash outflow associated with the purchase of all investments (debt, security, other) during the period and the net change... false false false false false false false false false false true negated false 1 false true false false -389000000 -389 false false false 2 false true false false -5908000000 -5908 false false false 3 false true false false 3337000000 3337 false false false The cash outflow associated with the purchase of all investments (debt, security, other) during the period and the net change during the reporting period in outstanding loans. No authoritative reference available. false 28 Proceeds from sales of property, plant, and equipment 4 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 1182000000 1182 false false false 2 false true false false 2961000000 2961 false false false 3 false true false false 115000000 115 false false false The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c false 29 Proceeds from sales and redemption of investments 4 us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 9101000000 9101 false false false 2 false true false false 261000000 261 false false false 3 false true false false 490000000 490 false false false The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 31 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 18 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 false 30 Increase in finance receivables 4 us-gaap_PaymentsToAcquireFinanceReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -172218000000 -172218 false false false 2 false true false false -193495000000 -193495 false false false 3 false true false false -196494000000 -196494 false false false The cash outflow for the purchase of amounts due from customers, clients, lessees, borrowers, or others under the terms of its agreements therewith. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph a false 31 Collection of finance receivables 4 us-gaap_ProceedsFromSaleAndCollectionOfFinanceReceivables us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 150368000000 150368 false false false 2 false true false false 154935000000 154935 false false false 3 false true false false 155202000000 155202 false false false The cash inflow associated with the sale or collection of receivables arising from the financing of goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph a false 32 Other 4 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -4822000000 -4822 false false false 2 false true false false 184000000 184 false false false 3 false true false false 741000000 741 false false false The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 false 33 Net cash used in investing activities 4 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false false false totallabel false 1 false true false false -43399000000 -43399 false false false 2 false true false false -74021000000 -74021 false false false 3 false true false false -72344000000 -72344 false false false The net cash inflow (outflow) from investing activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 34 Financing activities: 3 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false No definition available. false 35 Proceeds from issuance of long-term debt 4 us-gaap_ProceedsFromIssuanceOfLongTermDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 121966000000 121966 false false false 2 false true false false 129967000000 129967 false false false 3 false true false false 113962000000 113962 false false false The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b false 36 Repayments of long-term debt 4 us-gaap_RepaymentsOfLongTermDebt us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -90067000000 -90067 false false false 2 false true false false -74386000000 -74386 false false false 3 false true false false -84895000000 -84895 false false false The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b false 37 Net increase (decrease) in short-term borrowings 4 us-gaap_ProceedsFromRepaymentsOfShortTermDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false -43729000000 -43729 false false false 2 false true false false 54619000000 54619 false false false 3 false true false false -15840000000 -15840 false false false The net cash inflow (outflow) for borrowing having initial term of repayment within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 false 38 Cash dividends 4 us-gaap_PaymentsOfDividends us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -17814000000 -17814 false false false 2 false true false false -19193000000 -19193 false false false 3 false true false false -16777000000 -16777 false false false The cash outflow from the entity's earnings to the shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a false 39 Purchases of treasury stock 4 us-gaap_PaymentsForRepurchaseOfCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false false true negated false 1 false true false false -191000000 -191 false false false 2 false true false false -5338000000 -5338 false false false 3 false true false false -7997000000 -7997 false false false The cash outflow to reacquire common stock during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a false 40 Purchases of noncontrolling interests 4 kub_PurchaseOfNoncontrollingInterest kub false credit duration monetary The cash outflow to return capital to noncontrolled interest, which generally occurs when noncontrolling shareholders reduce... false false false false false false false false false false true negated false 1 false true false false -6407000000 -6407 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false The cash outflow to return capital to noncontrolled interest, which generally occurs when noncontrolling shareholders reduce their ownership stake (in a subsidiary of the entity). No authoritative reference available. false 41 Other 4 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1570000000 1570 false false false 2 false true false false -809000000 -809 false false false 3 false true false false -133000000 -133 false false false The net cash inflow (outflow) from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18, 19, 20 false 42 Net cash provided by (used in) financing activities 4 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false false false totallabel false 1 false true false false -34672000000 -34672 false false false 2 false true false false 84860000000 84860 false false false 3 false true false false -11680000000 -11680 false false false The net cash inflow (outflow) from financing activity for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 43 Effect of exchange rate changes on cash and cash equivalents 3 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents us-gaap true debit duration monetary No definition available. false false false false false false false false false false false false 1 false true false false 922000000 922 false false false 2 false true false false -7541000000 -7541 false false false 3 false true false false 97000000 97 false false false The effect of exchange rate changes on cash balances held in foreign currencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 25 false 44 Net increase (decrease) in cash and cash equivalents 3 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false false false totallabel false 1 false true false false 41923000000 41923 false false false 2 false true false false -19279000000 -19279 false false false 3 false true false false 6183000000 6183 false false false The net change between the beginning and ending balance of cash and cash equivalents. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 45 Cash and cash equivalents, beginning of year 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false false true false false periodstartlabel false 1 false true false false 69505000000 69505 false false false 2 false true false false 88784000000 88784 false false false 3 false true false false 82601000000 82601 false false false Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 false 46 Cash and cash equivalents, end of year 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false false false true false periodendlabel false 1 true true false false 111428000000 111428 false false false 2 true true false false 69505000000 69505 false false false 3 true true false false 88784000000 88784 false false false Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 false false 3 42 false Millions UnKnown UnKnown false true