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Pension Plan - Company's Target Asset Allocation Percentage, by Asset Class (Detail) | 12 Months Ended
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Feb. 28, 2017
Minimum [Member] | Cash [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Percentage | 1.00%
Minimum [Member] | Fixed Income [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Percentage | 35.00%
Minimum [Member] | Equity Securities [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Percentage | 45.00%
Maximum [Member] | Cash [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Percentage | 5.00%
Maximum [Member] | Fixed Income [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Percentage | 55.00%
Maximum [Member] | Equity Securities [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Percentage | 60.00%

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=65897934&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)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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