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Installment Loans - Additional Information (Detail) In Millions | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2011 USD ($) | Mar. 31, 2011 JPY (¥) | Mar. 31, 2010 JPY (¥) | Mar. 31, 2009 JPY (¥) | Mar. 31, 2011 Purchased loans USD ($) | Mar. 31, 2011 Purchased loans JPY (¥) | Mar. 31, 2010 Purchased loans JPY (¥)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |
Interest income on loans | $ 1,829 | ¥ 152,118 | ¥ 114,730 | ¥ 172,403 |  |  |  |  |  |
Loans held for sale in installment loans | 165 | 13,718 | 0 |  |  |  |  |  |  |
Installment Loans | 35,877 | 2,983,164 | 2,464,251 |  | 1,339 | [1] | 111,335 | [1] | 122,973 | [1]
Fair value at the acquisition date of purchased loans acquired during the period |  |  |  |  | 90 |  | 7,449 |  | 8,036 |
Purchased loans for which valuation allowances were provided |  |  |  |  | $ 441 |  | ¥ 36,685 |  | ¥ 24,021 |
[1] | Purchased loans represent loans with evidence of deterioration of credit quality since origination and for which it is probable at acquisition that collection of all contractually required payments from the debtor is unlikely and consist mainly of housing loans, loans to real estate companies and commercial, industrial and other companies in Japan.

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- Definition Reflects the sum of the gross carrying amounts of the various categories of loans made to individuals or corporate borrowers. + Details
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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 -Article 9 + Details
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- Definition Reflects the carrying amount of loans which have been written down and for which there is a related reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph j(ii) -Subsection I + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loan receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 4 + Details
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- Definition The face amount of loans that will be sold to other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph d + Details
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