Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Stock Compensation Plans [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Jul. 31, 2010	$ 443,216		$ 744,247	$ 22,326	$ (40,486)	$ (422,670)	$ 746,633
Comprehensive income
Net earnings			225,291				225,291
Foreign currency translation					72,505		72,505
Pension liability adjustment, net of deferred taxes					7,166		7,166
Net gain on hedging derivatives					842		842
Total comprehensive income							305,804
Treasury stock acquired						(108,929)	(108,929)
Stock options exercised		(10,792)	(7,854)	1,862		30,604	13,820
Deferred stock and other activity		(1,418)	174	548		2,185	1,489
Performance awards		(7)	7
Stock option expense			6,462				6,462
Tax reduction - employee plans		12,217					12,217
Dividends (per share)			(42,785)				(42,785)
Balance at Jul. 31, 2011	443,216		925,542	24,736	40,027	(498,810)	934,711
Comprehensive income
Net earnings			264,301				264,301
Foreign currency translation					(98,723)		(98,723)
Pension liability adjustment, net of deferred taxes					(42,520)		(42,520)
Net gain on hedging derivatives					(672)		(672)
Total comprehensive income							122,386
Treasury stock acquired						(130,233)	(130,233)
Stock options exercised		(9,834)	(5,116)			27,698	12,748
Deferred stock and other activity		(2,158)	312	213		1,926	293
Performance awards			(9)	(1)			(10)
Stock option expense			7,800				7,800
Tax reduction - employee plans		11,992					11,992
Two-for-one Stock split	315,000		(776,369)			461,369
Dividends (per share)			(49,673)				(49,673)
Balance at Jul. 31, 2012	758,216		366,788	24,948	(101,888)	(138,050)	910,014
Comprehensive income
Net earnings			247,377				247,377
Foreign currency translation					17,435		17,435
Pension liability adjustment, net of deferred taxes					46,860		46,860
Net gain on hedging derivatives					120		120
Total comprehensive income							311,792
Treasury stock acquired						(102,572)	(102,572)
Stock options exercised		(10,836)	(21,256)			44,463	12,371
Deferred stock and other activity		(2,125)	(1,677)	(1,586)		4,496	(892)
Performance awards		(573)	(1,161)	(1,617)		2,055	(1,296)
Stock option expense			8,300				8,300
Tax reduction - employee plans		13,534					13,534
Dividends (per share)			(66,064)				(66,064)
Balance at Jul. 31, 2013	$ 758,216		$ 532,307	$ 21,745	$ (37,473)	$ (189,608)	$ 1,085,187