Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest	Stock Compensation Plans	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Employee Stock Option	Employee Stock Option Additional Paid-in Capital	Employee Stock Option Retained Earnings	Employee Stock Option Stock Compensation Plans	Employee Stock Option Treasury Stock
Beginning Balance at Jul. 31, 2013	$ 1,085.2	$ 758.2	$ 0.0	$ 532.3	$ 0.0	$ 21.8	$ (37.5)	$ (189.6)
Comprehensive income
Net earnings	260.2			260.2
Foreign currency translation	(2.1)						(2.1)
Pension liability adjustment, net of deferred taxes	(6.3)						(6.3)
Net gain on cash flow hedging derivatives, net of deferred taxes	0.1						0.1
Total comprehensive income	251.9
Treasury stock acquired	(279.4)							(279.4)
Stock options exercised	13.0		(7.0)	(10.5)				30.5
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	9.9			9.9
Deferred stock and other activity	(0.5)		(3.1)	(1.8)		(0.5)		4.9
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition									$ 1.0	$ 0.4	$ 0.5	$ 1.7	$ (1.6)
Tax reduction - employee plans	10.5		10.5
Dividends	(87.2)			(87.2)
Ending Balance at Jul. 31, 2014	1,002.4	758.2	0.0	702.4	0.0	19.6	(45.8)	(432.0)
Comprehensive income
Net earnings	208.1			208.1
Foreign currency translation	(119.1)						(119.1)
Pension liability adjustment, net of deferred taxes	3.4						3.4
Net gain on cash flow hedging derivatives, net of deferred taxes	(0.5)						(0.5)
Total comprehensive income	91.9
Purchase of IFIL	3.9
Treasury stock acquired	(256.3)							(256.3)
Stock options exercised	11.4		(5.7)	(13.1)				30.2
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	9.5			9.5
Deferred stock and other activity	(0.7)		(1.9)	(0.7)		(1.1)		3.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	0.2		0.1	0.1		0.6		(0.6)
Tax reduction - employee plans	7.7		7.7
Dividends	(90.9)			(90.9)
Ending Balance at Jul. 31, 2015	778.7	758.2	0.0	815.2	3.9	17.9	(162.0)	(654.5)
Comprehensive income
Net earnings	190.8			190.8
Foreign currency translation	(18.5)						(18.5)
Pension liability adjustment, net of deferred taxes	(25.2)						(25.2)
Net gain on cash flow hedging derivatives, net of deferred taxes	0.1
Total comprehensive income	147.2
Treasury stock acquired	(84.3)							84.3
Stock options exercised	12.9		(1.4)	(14.7)				29.0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	6.7			6.7
Deferred stock and other activity	(0.8)		(1.3)	(1.4)		(0.7)		2.5
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	0.2					0.5		(0.3)
Noncontrolling Interest, Deferred Stock And Other Activity	0.1
Tax reduction - employee plans	2.7		2.7
Dividends	(91.5)			(91.5)
Ending Balance at Jul. 31, 2016	$ 771.4	$ 758.2	$ 0.0	$ 905.1	$ 4.0	$ 16.7	$ (205.6)	$ (707.0)