Document And Entity Information Abstract Derivative assets The net change during the period in the carrying value of derivative instruments reported as assets that are due to be disposed of within one year (or the normal operating cycle, if longer). Increase Decrease In Derivative Assets Derivative assets Increase Decrease Derivative Liabilities The net change during the period in the carrying value of derivative instruments reported as liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer). Derivative liabilities Collection of finance receivables (excluding whoselsale) The cash inflow associated with the collection of receivables arising from the financing of goods and services. Proceeds From Collection Of Finance Receivables Net change in dealer receivables The net change during the reporting period in dealer/ wholesale receivables due to the reporting entity. Net change in wholesale receivables Net Increase Decrease In Wholesale Receivables Fair Value Measurements Disclosure Abstract Fair Value Disclosures Abstract Proceeds from issuance of debt Proceeds from issuance of debt The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. Payments on debt The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. Repayments Of Debt Payments on debt Investments In Marketable Securities Disclosure Abstract Financing Receivables Abstract Financing Receivables Text Block This element represents the complete disclosures related to financing receivables. Examples of financing receivables include, but not limited to, loans, trade accounts receivables, notes receivable, credit cards, and receivables relating to a lessor's right(s) to payment(s) from a lease other than an operating lease that is recognized as assets. Allowance For Credit Losses Text Block Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Abstract CommitmentsAndContingenciesDisclosureAbstract Income Tax Disclosure Abstract SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract Other Assets And Other Liabilties Disclosure [Abstract] Other Assets And Other Liabilties Disclosure Abstract Other Assets And Other Liabilties Disclosure [Text Block] Other Assets And Other Liabilties Disclosure Text Block Debt Disclosure Abstract Variable Interest Entities [Line Items] Variable interest entities Variable Interest Assets ASSETS Variable Interest Entity Abstract LIABILITIES Variable Interest Entities Abstract Variable interest entities abstract Tax Provision Net Unrealized Gain Loss Available-For-Sale Marketable Securities Net of tax provision on available-for-sale securities Definition:The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period Net Of Tax Benefit Reclassification Adjustment Net of tax benefit on available-for-sale securities Definition: Reclassification adjustment for unrealized gains or losses realized upon the sale of securities, after tax. Reclassification Adjustment Net of Tax Benefit Reclassification adjustment net of tax benefit eclassification adjustment for net loss (net gain) included in net income, net of tax Reclassification Adjustment Net Of Tax Provision Reclassification adjustment net of tax provision Reclassification adjustment for net loss (net gain) included in net income, net of tax Interim Financial Data Disclosures Abstract Proceeds From Repayments Of Commercial Paper Net change in commercial paper The net cash inflow or cash outflow from issuing (borrowing) and repaying commercial paper. Repayments of proceeds from commercial paper Subsequent Events Abstract Subsequent Events Text Block Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. Subsequent Events Text Block Commitments And Contingencies 2011 Commitments and contingencies (See Note 13) Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Accumulated other comprehensive income Additional paid-in-capital Amortization of deferred costs Amortization of deferred costs Statement Of Financial Position Net unrealized gain on available-for-sale marketable securities, net of tax Cash and cash equivalents Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Interest paid Net change in: Commitments And Contingencies Disclosure Text Block Common Stock Shares Authorized Common Stock Shares Issued Common Stock Shares Outstanding Capital stock, no par value (100,000 shares authorized; 91,500 issued and outstanding) at June 30, 2011 and March 31, 2011 Advances from affiliates (Note 15) Debt Disclosure Text Block Deferred income taxes Deferred Income Tax Expense Benefit Deferred income taxes Depreciation and amortization Derivative Instruments And Hedging Activities Disclosure Text Block Repayments to affiliates (Note 15) Repayments to affiliates (Note 15) Stock based compensation Insurance losses and loss adjustment expenses Net gain from sale of marketable securities Net gain from sale of marketable securities Operating and administrative General Discussion Of Derivative Instruments And Hedging Activities Abstract Net financing revenues Net financing revenues Other-than-temporary impairment on marketable securities Income Statement Abstract Income Tax Disclosure Text Block Income taxes (received) paid, net Other assets (Note 9) and accrued income Increase Decrease In Other Operating Assets Interest expense Dealer Retail Total financing revenues Total financing revenues Total liabilities Total liabilities Total liabilities and shareholder's equity Total liabilities and shareholder's equity LIABILITIES AND SHAREHOLDER'S EQUITY Line Of Credit Facility Abstract Investments in marketable securities Variable Interest Entities By Classification Of Entity [Axis] Net cash provided by (used in) financing activities Net cash (used in) provided by financing activities Cash flows from financing activities: Net Cash Provided By Used In Investing Activities Net cash provided by (used in) investing activities Cash flows from investing activities: Net cash provided by operating activities Net cash provided by operating activities Cash flows from operating activities: Net income Net income Net increase in cash and cash equivalents Net increase in cash and cash equivalents Finance receivables, net Investments in operating leases, net Insurance earned premiums and contract revenues Debt Depreciation on operating leases Operating lease Operating Leases Of Lessor Disclosure Text Block Net financing revenues and other revenues Net financing revenues and other revenues Financing revenues: Organization Consolidation And Presentation Of Financial Statements Disclosure Text Block Other assets Total comprehensive income Other Comprehensive Income (Loss), Net of Tax Other, net Other, net Other liabilities Dividends paid to TFSA Dividends paid to TFSA (Note 15) Advances to affiliates Advances to affiliates (Note 15) Pension And Other Postretirement Benefits Disclosure Text Block Proceeds from maturities of investments in marketable securities Repayments from affiliates (Note 15) Proceeds from sales of investments in marketable securities Disposals of investments in operating leases Provision for credit losses Provision For Loan Lease And Other Losses Provision for credit losses Purchase of investments in marketable securities Purchase of investments in marketable securities Acquisition of finance receivables (excluding wholesale) Acquisition of finance receivables (excluding wholesale) Acquisition of investments in operating leases Acquisition of investments in operating leases Related Party Transactions Disclosure Text Block Restricted cash Retained earnings Schedule Of Line Of Credit Facilities Disclosure Text Block Segment Reporting Disclosure Text Block Statement Of Cash Flows Abstract Statement Of Stockholders Equity Abstract Shareholder's equity: Supplemental disclosures: Schedule of Variable Interest Entities Disclosure Text Block Variable Interest Entity Primary Beneficiary Member Capital stock Available For Sale Securities Text Block Total assets Total Assets Allowance For Loan And Lease Losses Provision For Loss Net Abstract Statement [Table] ASSETS Statement [Line Items] Fair Value Measurement Inputs Disclosure Text Block Leases Operating Abstract Fair Value Disclosures Text Block Quarterly Financial Information Text Block Selected Quarterly Financial Information Abstract Total expenses Total expenses Other liabilities Increase Decrease In Other Operating Liabilities Recognition of deferred income Recognition of deferred income Expenses: Income before income taxes Income before income taxes Common Stock Par Or Stated Value Per Share Reclassification adjustment for net loss (net gain) included in net income, net of tax Reclassification adjustment for net loss (net gain) included in net income, net of tax Total shareholder's equity Balance Balance Total shareholder's equity Provision for income taxes Pension And Other Postretirement Benefit Contributions Abstract Foreign currency and other adjustments to the carrying value of debt, net Foreign Currency And Other Adjustments To Carrying Value Of Debt Net Statement Equity Components [Axis] Additional paid-in capital Retained earnings [Member] Accumulated other comprehensive income (loss) Equity Component [Domain] Investment and other income, net Restricted Cash Increase Decrease In Restricted Cash For Operating Activities Restricted cash Effects of accounting change regarding pension plan measurement date Classification Of Variable Interest Entity [Domain] Dividends Dividends Adjustments to reconcile net income to net cash provided by operating activities: Related Party Transaction Due From To Related Party Abstract Amendment Description Amendment Flag Current Fiscal Year End Date Document Period End Date Entity Well Known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type