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, 2015	Jul. 31, 2014	Jul. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Awards, outstanding beginning balance (in shares)	2,756	2,753	3,170
Awards, granted (in shares)	242	352	412
Awards, exercised (in shares)	(575)	(321)	(735)
Awards, forfeited or expired (in shares)	(38)	(28)	(94)
Awards, outstanding ending balance (in shares)	2,385	2,756	2,753
Awards, exercisable ending balance (in shares)	1,817
Weighted-average exercise price, outstanding beginning balance (in dollars per share)	$ 42.06	$ 37.63	$ 34.20
Weighted-average exercise price, granted (in dollars per share)	91.64	73.13	57.43
Weighted-average exercise price, exercised (in dollars per share)	36.20	37.62	33.22
Weighted-average exercise price, forfeited or expired (in dollars per share)	75.99	48.87	43.21
Weighted-average exercise price, outstanding ending balance (in dollars per share)	47.96	$ 42.06	$ 37.63
Weighted-average exercise price, exercisable ending balance (in dollars per share)	$ 38.80
Weighted-average remaining contractual term, outstanding ending balance (in years)	5 years 8 months 14 days
Weighted-average remaining contractual term, exercisable ending balance (in years)	4 years 10 months 24 days
Aggregate intrinsic value, outstanding ending balance	$ 147,196
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	2,355
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 47.63
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5 years 8 months 14 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 146,176
Aggregate intrinsic value, exercisable ending balance	$ 128,829