Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Service cost	$ 20,412	$ 18,821	$ 19,439
Interest cost	19,108	19,499	16,953
Expected return on assets	(29,529)	(30,794)	(28,111)
Prior service cost and transition amortization	570	590	591
Actuarial loss amortization	7,086	7,403	10,362
Settlement loss	3,906
Net periodic benefit cost	$ 21,553	$ 15,519	$ 19,234