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Securitization Transactions - Additional Information (Detail) In Millions | 12 Months Ended |  |  | 12 Months Ended |  |  | 12 Months Ended
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Mar. 31, 2011 USD ($) | Mar. 31, 2011 JPY (¥) | Mar. 31, 2010 JPY (¥) | Mar. 31, 2009 JPY (¥) | Mar. 31, 2010 Installment Loans Interests Continued To Be Held JPY (¥) | Mar. 31, 2009 Installment Loans Interests Continued To Be Held JPY (¥) | Mar. 31, 2011 Investment in securities JPY (¥) | Mar. 31, 2010 Investment in securities JPY (¥) | Mar. 31, 2010 Investment in securities Interests Continued To Be Held JPY (¥) | Mar. 31, 2009 Investment in securities Interests Continued To Be Held JPY (¥) | Mar. 31, 2011 Direct Financing Leases And Installment Loans JPY (¥) | Mar. 31, 2011 Direct Financing Leases And Installment Loans USD ($) | Mar. 31, 2010 Direct Financing Leases And Installment Loans JPY (¥) | Mar. 31, 2010 Interests Continued To Be Held JPY (¥) | Mar. 31, 2009 Interests Continued To Be Held JPY (¥)
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from interests that continue to be held, included in revenues from direct financing leases | $ 617 | ¥ 51,320 | ¥ 50,004 | ¥ 63,275 |  |  |  |  |  |  |  |  |  | ¥ 4,744 | ¥ 5,772
Revenues from interests that continue to be held, included in interest on loans and investment securities | 2,042 | 169,808 | 135,166 | 196,161 | 1,630 | 1,476 |  |  | 2,378 | 3,469 |  |  |  |  |
Total assets sold on securitization |  |  |  |  |  |  | 0 | 31,123 |  |  | 12,651 | 152 | 257,654 |  |
Total assets sold on securitization of which the Company and certain subsidiaries' only continuing involvement |  |  |  |  |  |  |  |  |  |  | ¥ 9,158 | $ 110 | ¥ 19,366 |  |

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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans whether held-for-sale or held-in-portfolio; (2) investment securities; (3) dividend income; or (4) other investments not otherwise specified herein. + Details
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- Definition Principal Amount Outstanding on Loans Securitized And Held For Sale + Details
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- Definition Revenue realized in the period on direct financing leases. + Details
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- Definition This is the principal amount outstanding for loans which are in the process of being securitized as of the date of the statement of financial position (across all types of loans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4 and FIN46(R)-8 -Paragraph B11 -Subparagraph b(6) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph i(4) + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + Details
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