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Pension Plan - Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Pension Cost (Detail)
12 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 29, 2012
Compensation And Retirement Disclosure [Abstract]      
Weighted average discount rate (net periodic pension cost) 4.60% 5.05% 5.85%
Earnings progression (net periodic pension cost) 3.00% 3.00% 3.00%
Expected long-term rate of return on plan assets 8.00% 8.00% 8.00%
Weighted average discount rate (benefit obligations) 4.90% 4.60% 5.05%
Earnings progression (benefit obligations) 3.00% 3.00% 3.00%