Stock Compensation Plan (Schedule Of Share Based Compensation Option And SARs Award Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Share-based Payment Arrangement [Abstract]
Awards, outstanding beginning balance (in shares)	1,061	1,171	1,324
Awards, granted (in shares)	205	146	80
Awards, exercised (in shares)	(370)	(247)	(219)
Awards, forfeited or expired (in shares)	(23)	(9)	(14)
Awards, outstanding ending balance (in shares)	873	1,061	1,171
Awards, exercisable ending balance (in shares)	571
Weighted-average exercise price, outstanding beginning balance (in dollars per share)	$ 138.59	$ 111.12	$ 91.01
Weighted-average exercise price, granted (in dollars per share)	233.01	245.26	293.82
Weighted-average exercise price, exercised (in dollars per share)	84.20	67.19	49.09
Weighted-average exercise price, forfeited or expired (in dollars per share)	236.31	252.75	217.58
Weighted-average exercise price, outstanding ending balance (in dollars per share)	181.17	$ 138.59	$ 111.12
Weighted-average exercise price, exercisable ending balance (in dollars per share)	$ 149.21
Weighted-average remaining contractual term, outstanding ending balance (in years)	5 years 9 months 18 days
Weighted-average remaining contractual term, exercisable ending balance (in years)	4 years 3 months 18 days
Aggregate intrinsic value, outstanding ending balance	$ 108,910
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	852
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 179.67
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 107,567
Aggregate intrinsic value, exercisable ending balance	$ 89,531