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Key Economic Assumptions Used in Measuring Fair Value Interests Recorded in the Consolidated Balance Sheet (Detail) | 12 Months Ended
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Mar. 31, 2010
Direct financing leases | Minimum |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 0.29%
Discount rate | 1.17%
Annual prepayment rate | 1.52%
Direct financing leases | Maximum |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 1.62%
Discount rate | 21.25%
Annual prepayment rate | 6.66%
Installment Commercial Mortgage Loans | Minimum |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 0.72%
Discount rate | 0.22%
Annual prepayment rate | 2.86%
Installment Commercial Mortgage Loans | Maximum |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 14.00%
Discount rate | 9.88%
Annual prepayment rate | 42.93%
Minimum | Installment Mortgage Loans for individuals |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 0.74%
Discount rate | 1.39%
Annual prepayment rate | 1.56%
Maximum | Installment Mortgage Loans for individuals |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 1.18%
Discount rate | 6.33%
Annual prepayment rate | 5.64%
Minimum | Investment in securities |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 1.22%
Discount rate | 0.22%
Annual prepayment rate | 7.56%
Maximum | Investment in securities |
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] |
Expected credit loss | 14.00%
Discount rate | 18.49%
Annual prepayment rate | 42.93%

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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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- Definition The discount rate which is used to value residual cash flows generated by financial assets of the securitization or asset-backed financing arrangement. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, as of the date of the latest statement of financial position presented. + 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(3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph i(2) + Details
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- Definition The rate at which principal will not be repaid on securitized financial assets. This is used as a key input and assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, as of the date of the latest statement of financial position presented. + 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(3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph i(2) + Details
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- Definition Estimated speed of prepayments of principal on financial assets. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, as of the date of the latest statement of financial position presented. + 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(3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph i(2) + Details
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