NOTES PAYABLE AND LONG-TERM DEBT (Details Textuals) (USD $)	12 Months Ended			0 Months Ended				12 Months Ended		12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Apr. 11, 2013 Senior Revolving Credit Facility Due Fiscal Year 2018 [Member] Line of Credit [Member]	Jun. 18, 2010 5.00% Senior Notes Due Fiscal Year 2020 [Member] Senior Notes [Member]	Jun. 18, 2010 5.00% Senior Notes Due Fiscal Year 2020 [Member] Senior Notes [Member]	Jul. 31, 2013 Maximum [Member] Senior Revolving Credit Facility Due Fiscal Year 2018 [Member] Line of Credit [Member]	Jul. 31, 2013 Commercial Paper [Member]	Jul. 31, 2012 Commercial Paper [Member]	Jul. 31, 2013 Commercial Paper [Member] Minimum [Member]	Jul. 31, 2013 Commercial Paper [Member] Maximum [Member]	Jul. 31, 2013 Commercial Paper [Member]	Jul. 31, 2013 Senior Revolving Credit Facility and Commercial Paper [Member]	Apr. 10, 2013 Revolving Credit Facility [Member] Senior Revolving Credit Facility Due Fiscal Year 2015 [Member]	Jul. 31, 2013 Letter of Credit [Member] Senior Revolving Credit Facility Due Fiscal Year 2018 [Member] Line of Credit [Member]	Jul. 31, 2013 Guarantees, Performance Bonds and Warranties [Member]
Debt Instrument [Line Items]
Line of credit facility capacity				$ 1,200,000,000								$ 600,000,000	$ 600,000,000	$ 500,000,000
Short term borrowings	169,967,000	204,940,000						169,967,000
Interest rate, minimum								0.32%
Interest rate, maximum								0.48%
Term of debt instrument				5 years						6 days	41 days
Deferred financing costs				3,043,000		3,455,000
Letters of credit outstanding amount															7,242,000
Ratio of indebtedness to net capital							3.5
Face amount of publicy traded senior notes						375,000,000
Percentage of interest on senior notes issued						5.00%
Discount on the new Notes issued						2,006,000
Underwriting fees	3,043,000	0	0			2,438,000
Proceeds from New notes						370,556,000
Loss on extinguishment of debt					31,374,000
Interest Expense Increase Decrease To Related To Income Taxes Payable	(2,794,000)	1,653,000	(485,000)
Weighted average borrowing interest rate								0.35%	0.48%
Debt, Weighted Average Interest Rate	3.38%	3.23%
Unsecured Credit Facilities	225,047,000
Unsecured credit facilities, compensating balances	842,000
Amount oustanding																$ 53,469,000