Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 136,645	$ 128,199	$ 474,367	$ 482,401
Other comprehensive income (loss), net of taxes:
Net change in retirement benefit plan unrecognized actuarial losses	247	322	744	967
Net change in cash flow hedge unrecognized losses	6,200	(837)	9,317	(2,240)
Other comprehensive income (loss)	6,447	(515)	10,061	(1,273)
TOTAL COMPREHENSIVE INCOME	$ 143,092	$ 127,684	$ 484,428	$ 481,128