Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 623,428	$ 597,358	$ 492,586
Other comprehensive income (loss), net of taxes:
Net change in retirement benefit plan unrecognized actuarial losses	2,750	(20,505)	10,764
Net change in cash flow hedge unrecognized losses	(7,555)	1,385	2,773
Other comprehensive (loss) income, net of taxes	(4,805)	(19,120)	13,537
TOTAL COMPREHENSIVE INCOME	$ 618,623	$ 578,238	$ 506,123