Employee Benefit Plans (Obligations And Funded Status Of Company's Pension Plans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 15,464	$ 16,148	$ 13,184
Interest cost	19,436	19,440	19,445
Actuarial loss	(5,696)	(3,962)	(2,864)
Underfunded status at July 31, 2012 and 2011	(73,916)	(30,457)
Change In Benefit Obligation [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning of year	404,012	377,903
Service cost	15,464	16,148
Interest cost	19,436	19,440
Plan amendments	(781)	1,639
Participant contributions	1,130	1,058
Actuarial loss	51,914	1,034
Currency exchange rates	(9,689)	6,936
Benefits paid	(19,994)	(20,146)
Benefit obligation, end of year	461,492	404,012
Change in Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Participant contributions	1,130	1,058
Benefits paid	(19,994)	(20,146)
Beginning balance	373,555	319,734
Actual return on plan assets	4,442	38,758
Company contributions	37,915	27,655
Currency exchange rates	(9,472)	6,496
Ending balance	$ 387,576	$ 373,555