Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 235,300	$ 173,156	$ 536,974	$ 673,499
Other comprehensive income (loss), net of taxes:
Net change in retirement benefit plan unrecognized actuarial losses	727	355	2,183	1,066
Net change in cash flow hedge unrecognized losses	6,775	9,268	(5,036)	(15,063)
Other comprehensive income (loss), net of taxes	7,502	9,623	(2,853)	(13,997)
TOTAL COMPREHENSIVE INCOME	$ 242,802	$ 182,779	$ 534,121	$ 659,502