Summary of Share-Based Awards Granted During Period (Detail) - $ / shares	3 Months Ended
	May 31, 2017		May 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares and Share units, Shares and Shares Underlying Awards	1,204,517		1,435,748
Shares and share units, Weighted Average Per Share Award Fair Value	$ 86.72		$ 75.89
Service-Based Shares and Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares and Share units, Shares and Shares Underlying Awards	838,395		934,890
Shares and share units, Weighted Average Per Share Award Fair Value	$ 86.17		$ 75.45
Performance Share Units - Target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares and Share units, Shares and Shares Underlying Awards	261,760	[1]	360,676
Shares and share units, Weighted Average Per Share Award Fair Value	$ 87.99		$ 76.70
Performance Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares and Share units, Shares and Shares Underlying Awards	104,362	[2]	140,182
Shares and share units, Weighted Average Per Share Award Fair Value	$ 87.99		$ 76.70

[1] Certain executives and senior management were awarded a target number of performance share units ("PSUs"). PSU grantees may earn up to 200% of the target number of PSUs. Half of the target number of PSUs can be earned by the grantees depending upon the Company's financial performance measured against the financial performance of specified peer companies during a three-year performance period beginning on March 1, 2017. The remaining target number of PSUs can be earned by the grantees depending upon the Company's total shareholder return performance measured against the total shareholder return performance of specified peer companies during a three-year period beginning on March 1, 2017.

[2] Certain executives were granted restricted stock awards. These shares were awarded subject to the achievement of a specified dollar amount of revenue for the fiscal year ending February 28, 2018 (the "RSA Performance Goal"). If the Company fails to achieve the RSA Performance Goal for the fiscal year ending February 28, 2018, then all such shares are forfeited. If the Company achieves the RSA Performance Goal for the fiscal year ending February 28, 2018, then 25% of the restricted stock vests on or about July 16, 2018, and the remainder vests ratably on a quarterly basis over the course of the subsequent three-year period, provided that the grantee's business relationship with the Company has not ceased.