Net Earnings Per Share (Basic And Dilutive Net Earnings Per Share Reconciliations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Nov. 30, 2021	Aug. 31, 2021	May 31, 2021	Nov. 30, 2020	Aug. 31, 2020	May 31, 2020	Nov. 30, 2021	Nov. 30, 2020
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]
Net earnings	$ 269,438	$ 285,267	$ 436,756	$ 235,300	$ 296,696	$ 4,978	$ 991,461	$ 536,974
Weighted average common shares outstanding, shares	162,006			163,732			162,710	163,278
Weighted average common shares and dilutive potential common shares, shares	164,873			165,773			165,606	164,976
Basic net earnings per share (in dollars per share)	$ 1.66			$ 1.44			$ 6.09	$ 3.29
Diluted net earnings per share (in dollars per share)	$ 1.63			$ 1.42			$ 5.99	$ 3.25
Stock options
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]
Dilutive potential common shares, shares	2,373			1,636			2,391	1,341
Stock-settled stock units and awards
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]
Dilutive potential common shares, shares	494			405			505	357