Guarantor Subsidiaries And Non-Guarantor Subsidiaries (Supplemental Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Net cash (used in) provided by operating activities	$ 394,476	$ 306,197
Capital expenditures	(85,583)	(108,100)
Acquisition of businesses	(182,500)	0
Other investing activities, net	3,274	920
Net cash used in investing activities	(264,809)	(107,180)
Proceeds from Issuance of Other Long-term Debt	253,000	0
Repayments of Long-term Debt	(254,013)	(977)
Dividends paid	(52,778)	(29,998)
Other financing activities, net	5,041	732
Advances	0	0
Net cash provided by (used in) financing activities	(48,750)	(30,243)
Effect of exchange rate changes on cash and cash equivalents	(109)	53
Net increase (decrease) in cash and cash equivalents	80,808	168,827
Beginning of period	44,406	138,604
End of period	125,214	307,431
Parent Company [Member]
Net cash (used in) provided by operating activities	109,692	52,146
Capital expenditures	0	0
Acquisition of businesses	0
Other investing activities, net	0	0
Net cash used in investing activities	0	0
Proceeds from Issuance of Other Long-term Debt	0
Repayments of Long-term Debt	0	0
Dividends paid	(52,778)	(29,998)
Other financing activities, net	3,878	3,880
Advances	(60,792)	(26,028)
Net cash provided by (used in) financing activities	(109,692)	(52,146)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Beginning of period	0	0
End of period	0	0
100% Owned Guarantor Subsidiaries [Member]
Net cash (used in) provided by operating activities	285,406	252,610
Capital expenditures	(84,941)	(107,208)
Acquisition of businesses	(182,500)
Other investing activities, net	3,288	912
Net cash used in investing activities	(264,153)	(106,296)
Proceeds from Issuance of Other Long-term Debt	253,000
Repayments of Long-term Debt	(253,782)	(758)
Dividends paid	0	0
Other financing activities, net	1,018	(3,891)
Advances	60,792	26,028
Net cash provided by (used in) financing activities	61,028	21,379
Effect of exchange rate changes on cash and cash equivalents	218	(21)
Net increase (decrease) in cash and cash equivalents	82,499	167,672
Beginning of period	35,070	130,970
End of period	117,569	298,642
Other Subsidiaries [Member]
Net cash (used in) provided by operating activities	(622)	1,441
Capital expenditures	(642)	(892)
Acquisition of businesses	0
Other investing activities, net	(14)	8
Net cash used in investing activities	(656)	(884)
Proceeds from Issuance of Other Long-term Debt	0
Repayments of Long-term Debt	(231)	(219)
Dividends paid	0	0
Other financing activities, net	145	743
Advances	0	0
Net cash provided by (used in) financing activities	(86)	524
Effect of exchange rate changes on cash and cash equivalents	(327)	74
Net increase (decrease) in cash and cash equivalents	(1,691)	1,155
Beginning of period	9,336	7,634
End of period	$ 7,645	$ 8,789