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Weighted-Average Asset Allocation of Said Plan Assets for Pension Benefits (Detail) - Pension | Mar. 31, 2017
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Funds managed by trust |
Weighted-average asset allocation | 100.00%
Government Securities |
Funds managed by trust |
Weighted-average asset allocation | 6.90%
Debenture and bonds |
Funds managed by trust |
Weighted-average asset allocation | 87.70%
Other |
Funds managed by trust |
Weighted-average asset allocation | 5.40%

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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