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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
	May 31, 2018	May 31, 2017
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]
Net earnings	$ 238,656	$ 211,702
Weighted average common shares outstanding, shares	178,139	185,200
Weighted average common shares and dilutive potential common shares, shares	179,421	186,859
Basic net earnings per share (in dollars per share)	$ 1.34	$ 1.14
Diluted net earnings per share (in dollars per share)	$ 1.33	$ 1.13
Stock options
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]
Dilutive potential common shares, shares	925	1,209
Stock-settled stock units and awards
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]
Dilutive potential common shares, shares	357	450

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Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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