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Fair Value of Pension Plan Assets by Asset Category (Parenthetical) (Detail) (JPY ¥) In Millions, unless otherwise specified |  |  |  |  |  |  | 12 Months Ended |  | 12 Months Ended |  |  |  | 12 Months Ended
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Mar. 31, 2014 Overseas Pension Plans Defined Benefit | Mar. 31, 2013 Overseas Pension Plans Defined Benefit | Mar. 31, 2012 Overseas Pension Plans Defined Benefit | Mar. 31, 2014 Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2013 Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2012 Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2013 Japanese Government Bond Securities Overseas Pension Plans Defined Benefit | Mar. 31, 2014 Japanese Government Bond Securities Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2013 Japanese Municipal Bonds Securities Overseas Pension Plans Defined Benefit | Mar. 31, 2014 Japanese Municipal Bonds Securities Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2013 Japanese Corporate Bonds Securities Overseas Pension Plans Defined Benefit | Mar. 31, 2013 Japanese Corporate Bonds Securities Overseas Pension Plans Defined Benefit ORIX JREIT Inc. | Mar. 31, 2014 Japanese Corporate Bonds Securities Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2014 Japanese Corporate Bonds Securities Domestic Pension Plans Of Foreign Entity Defined Benefit ORIX JREIT Inc. | Mar. 31, 2013 Japanese Companies Equity Securities Overseas Pension Plans Defined Benefit | Mar. 31, 2013 Japanese Companies Equity Securities Overseas Pension Plans Defined Benefit ORIX JREIT Inc. | Mar. 31, 2014 Japanese Companies Equity Securities Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2014 Japanese Companies Equity Securities Domestic Pension Plans Of Foreign Entity Defined Benefit ORIX JREIT Inc. | Mar. 31, 2013 Foreign Government Bonds Domestic Pension Plans Of Foreign Entity Defined Benefit | Mar. 31, 2013 Debt Securities Domestic Pension Plans Of Foreign Entity Defined Benefit
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of pension plan assets | ¥ 62,042 | ¥ 3,825 | ¥ 3,040 | ¥ 104,984 | ¥ 93,144 | ¥ 82,905 |  |  |  |  | ¥ 107 | ¥ 41 | ¥ 46 | ¥ 20 | ¥ 12 | ¥ 179 | ¥ 25 | ¥ 181 |  |
Pension plan assets investment allocation in pooled funds |  |  |  |  |  |  | 70.00% | 70.00% | 10.00% | 10.00% | 20.00% |  | 20.00% |  |  |  |  |  | 90.00% | 10.00%

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 + Details
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