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Composition of Long Term Debt, Weighted Average Contract Interest Rate on Long Term Debt and Repayment Due Dates (Detail) (JPY ¥) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Debt Instrument [Line Items] |  |
Long-Term Debt | ¥ 3,858,874 | ¥ 4,061,534
Weighted average rate | 1.60% | 2.00%
Banks Fixed Rate |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 416,417 | 339,565
Weighted average rate | 2.30% | 2.60%
Minimum maturity date | 2015 | 2014
Maximum maturity date | 2030 | 2025
Banks Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 1,475,384 | 1,233,059
Weighted average rate | 1.10% | 1.10%
Minimum maturity date | 2015 | 2014
Maximum maturity date | 2030 | 2027
Insurance Companies And Others Fixed Rate |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 287,403 | 280,729
Weighted average rate | 1.40% | 1.60%
Minimum maturity date | 2015 | 2014
Maximum maturity date | 2024 | 2023
Insurance Companies And Others Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 251,021 | 246,055
Weighted average rate | 0.70% | 0.90%
Minimum maturity date | 2017 | 2014
Maximum maturity date | 2028 | 2028
Unsecured Bonds |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 1,128,788 | 1,173,902
Weighted average rate | 1.90% | 1.80%
Minimum maturity date | 2015 | 2014
Maximum maturity date | 2024 | 2021
Unsecured Convertible Bonds With Stock Acquisition Rights |  |
Debt Instrument [Line Items] |  |
Long-Term Debt |  | 50,289
Weighted average rate |  | 1.00%
Maturity date |  | 2014
Unsecured Notes Under Medium Term Note Program |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 46,034 | 58,169
Weighted average rate | 3.20% | 2.90%
Minimum maturity date | 2016 | 2014
Maximum maturity date | 2018 | 2018
Payables Under Securitized Lease Receivables |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | 122,723 | 160,163
Weighted average rate | 0.80% | 0.90%
Minimum maturity date | 2018 | 2014
Maximum maturity date | 2019 | 2019
Payables Under Securitized Loan Receivables And Investment In Securities |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | ¥ 131,104 | ¥ 519,603
Weighted average rate | 4.10% | 4.90%
Minimum maturity date | 2018 | 2014
Maximum maturity date | 2040 | 2039

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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