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Employee Benefit Plans - Summary of Weighted Average Asset Allocation of Plan Assets by Asset Category (Detail)
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12 Months Ended | |
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Mar. 31, 2014
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Mar. 31, 2013
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Target Plan Asset Allocations | 100.00% | 100.00% |
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Equity Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Target Plan Asset Allocations Range Minimum | 50.00% | |
| Target Plan Asset Allocations Range Maximum | 70.00% | |
| Target Plan Asset Allocations | 66.00% | 68.00% |
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Debt Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Target Plan Asset Allocations Range Minimum | 20.00% | |
| Target Plan Asset Allocations Range Maximum | 50.00% | |
| Target Plan Asset Allocations | 34.00% | 32.00% |
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Other, including cash [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Target Plan Asset Allocations Range Minimum | 0.00% | |
| Target Plan Asset Allocations Range Maximum | 10.00% | |
| Target Plan Asset Allocations | 0.00% | 0.00% |
| X | ||||||||||
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- Details
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- Definition
Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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