Intangible Assets and Goodwill - Methodology used to Value Licenses (Detail)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Minimum
Goodwill And Other Intangibles [Line Items]
Discount Rate	12.00%	11.90%	11.90%
Long-term Revenue Growth Rate	2.30%	2.30%	2.50%
Mature Market Share	3.50%	3.20%	3.20%
Operating Profit Margin	25.00%	25.10%	26.00%
Maximum
Goodwill And Other Intangibles [Line Items]
Discount Rate	12.40%	12.30%	12.20%
Long-term Revenue Growth Rate	3.10%	3.30%	3.30%
Mature Market Share	30.20%	29.40%	29.40%
Operating Profit Margin	39.10%	38.30%	37.20%