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Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (Detail) (JPY ¥) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
Domestic Pension Plans Of Foreign Entity Defined Benefit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Current year actuarial gain (loss) | ¥ 1,873 | ¥ 7,401 | ¥ (5,029)
Amortization of net actuarial loss | 777 | 1,447 | 1,175
Prior service credit due to amendments | 743 | 0 | 7
Amortization of prior service credit | (1,259) | (1,168) | (1,193)
Amortization of transition obligation | 53 | 53 | 53
Plan curtailments and settlements | 0 | 0 | 18
Total recognized in other comprehensive income (loss), pre-tax | 2,187 | 7,733 | (4,969)
Overseas Pension Plans Defined Benefit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Current year actuarial gain (loss) | 2,447 | (89) | (115)
Amortization of net actuarial loss | 60 | 49 | 43
Prior service credit due to amendments | 344 | 0 | 0
Amortization of prior service credit | (3) | 0 | 0
Amortization of transition obligation | 3 | 3 | 3
Foreign currency exchange rate change | (7) | (213) | 19
Total recognized in other comprehensive income (loss), pre-tax | ¥ 2,844 | ¥ (250) | ¥ (50)

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- Definition Amount before tax of cost (credit) of benefit changes attributable to plan participants' prior service resulting from a plan amendment or plan initiation that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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