Pension Plan - Company's Target Asset Allocation Percentage, by Asset Class (Detail)	12 Months Ended
	Feb. 28, 2014
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage, Minimum	2.00%
Target Allocation Percentage, maximum	5.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage, Minimum	43.00%
Target Allocation Percentage, maximum	53.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage, Minimum	45.00%
Target Allocation Percentage, maximum	55.00%