Pension Plan - Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Pension Cost (Detail)		12 Months Ended
Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Compensation and Retirement Disclosure [Abstract]
Weighted average discount rate (net periodic pension cost)		4.30%	4.00%	4.90%
Earnings progression (net periodic pension cost)		3.00%	3.00%	3.00%
Expected long-term rate of return on plan assets (net periodic pension cost)	8.00%	7.50%	8.00%	8.00%
Weighted average discount rate (benefit obligations)	4.30%	4.10%	4.30%	4.00%
Earnings progression (benefit obligations)		3.00%	3.00%	3.00%

Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Earnings Progression

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- Definition

Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Earnings Progression

+ References

No definition available.

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- References

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- Definition

The interest rate used to adjust for the time value of money for the plan.

+ 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 (k)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

The interest rate used to adjust for the time value of money.

+ References

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Long-Term Rate of Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512046

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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