Intangible Assets and Goodwill - Methodology used to Value Licenses (Detail)	12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Minimum
Goodwill And Other Intangibles [Line Items]
Discount Rate	12.10%	12.20%	12.00%
Long-term Revenue Growth Rate	1.00%	1.00%	1.30%
Mature Market Share	12.70%	3.10%	3.20%
Operating Profit Margin	27.00%	25.10%	25.00%
Maximum
Goodwill And Other Intangibles [Line Items]
Discount Rate	12.40%	12.50%	12.40%
Long-term Revenue Growth Rate	1.80%	2.00%	2.50%
Mature Market Share	31.10%	30.40%	29.30%
Operating Profit Margin	39.10%	39.10%	39.10%