NOTES PAYABLE AND LONG-TERM DEBT (Details Textuals)	12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended		0 Months Ended												12 Months Ended
	Jul. 31, 2012 USD ($)	Jul. 31, 2011 USD ($)	Jul. 31, 2010 USD ($)	Jul. 13, 2010 Senior Revolving Credit Facility Due Fiscal Year 2015 [Member] USD ($)	Jul. 31, 2012 Senior Revolving Credit Facility Due Fiscal Year 2015 [Member]	Jul. 13, 2010 Senior Revolving Credit Facility Due Fiscal Year 2011 [Member] USD ($)	Jul. 11, 2010 Senior Revolving Credit Facility Due Fiscal Year 2011 [Member] USD ($)	Jul. 13, 2010 Six Percent Private Placement Senior Notes Due Fiscal Year 2013 [Member] USD ($)	Jun. 18, 2010 Six Percent Private Placement Senior Notes Due Fiscal Year 2013 [Member] USD ($)	Jun. 18, 2010 Five Percent Senior Notes Due Fiscal Year 2020 [Member] USD ($)	Jul. 31, 2012 Five Percent Senior Notes Due Fiscal Year 2020 [Member] USD ($)		Jul. 31, 2011 Five Percent Senior Notes Due Fiscal Year 2020 [Member] USD ($)		Jul. 31, 2012 Jpy Loan Due Fiscal Year 2015 [Member] USD ($)		Jul. 31, 2011 Jpy Loan Due Fiscal Year 2015 [Member] USD ($)		May 26, 2010 Jpy Loan Due Fiscal Year 2015 [Member] JPY (¥)	Jul. 31, 2012 Commercial Paper [Member] USD ($)	Jul. 31, 2012 Minimum [Member] Commercial Paper [Member]	Jul. 31, 2012 Maximum [Member] Commercial Paper [Member]	Jul. 31, 2012 Letter of Credit [Member] USD ($)	Jul. 31, 2012 Letter of Credit [Member] Senior Revolving Credit Facility Due Fiscal Year 2015 [Member] USD ($)
Debt Instrument [Line Items]
Maximum Unsecured commercial paper note	$ 600,000,000
Maximum Unsecured Commercial Paper Note And Senior Revolving Credit Facility	600,000,000
Short term borrowings	204,940,000	214,957,000																		204,940,000
Interest rate, minimum																				0.37%
Interest rate, maximum																				0.53%
Term of debt instrument				5 years																	1 day	62 days
Date on which company entered into revolving credit facility				July 13, 2010
Line of credit facility capacity				500,000,000			500,000,000
Expiration date of unsecured senior revolving credit facility				July 13, 2015
Additional borrowings, new facility				295,000,000
Redemption of Senior notes								280,000,000
Redemption Premium	0	0	28,268,000					28,268,000
Redemption premium on senior notes paid through new facility borrowed								13,268,000
Deferred financing costs								2,856,000		3,455,000
Unamortized Deferred Financing Cost Write Off	0	0	3,245,000			139,000
Minimum interest coverage ratio					3.50 to 1.00
Debt Instrument, Covenant Compliance					3.50 to 1.00
Publicly traded notes issued by the Company										375,000,000									9,000,000,000
Unsecured Debt											373,428,000	[1]	373,228,000	[1]	115,129,000	[2]	115,803,000	[2]
Percentage of interest on senior notes issued								6.00%		5.00%									2.33%
Discount on the new Notes issued										2,006,000
Underwriting fees	0	0	6,311,000							2,438,000
Proceeds from New notes										370,556,000
Loss on extinguishment of debt	0	0	31,513,000						31,374,000
Interest Expense Increase Decrease To Related To Income Taxes Payable	1,653,000	(485,000)	(6,807,000)
Weighted average borrowing interest rate	0.48%	0.38%
Long term Debt Weighted Average Interest Rate	3.23%	3.16%
Unsecured Credit Facilities	196,220,000
Unsecured credit facilities, compensating balances	2,648,000
Unsecured Credit Facilities Committed To Other Programs																							$ 68,656,000	$ 7,493,000

[1] On June 18, 2010, the Company issued $375,000 of publicly traded 5.00% Senior Notes, due 2020 (the “Notes”). After the closing of the Notes, the Company received proceeds (net of the discount on the Notes of $2,006 and underwriting fees of $2,438) of $370,556. The Company used the net proceeds from this offering principally (1) to repay its then outstanding balance on the Prior Facility, and (2) for general corporate purposes. The Prior Notes, originally due August 1, 2012, were fully redeemed in July 2010 after the satisfaction of a 30-day notice period. In connection with this redemption, the Company recorded a loss on extinguishment of debt totaling $31,374, primarily comprised of the aforementioned redemption premium and the recognition of previously deferred financing costs related to the Prior Notes. In connection with the Notes, the Company incurred deferred financing costs of $3,455, which are being amortized to interest expense over the term of the Notes.The Notes are unsecured and unsubordinated obligations of the Company and rank pari passu to its other outstanding unsecured and unsubordinated indebtedness.

[2] On May 26, 2010, the Company refinanced its loan of JPY 9 billion (approximately $115,129 as of July 31, 2012), which was originally due on June 20, 2010, to May 26, 2015. Under the new financing agreement, interest is fixed at a rate of 2.33%. Previously, the interest payments were at a variable rate based upon Yen LIBOR. The Company designated this borrowing as a non-derivative hedge of a portion of its net JPY investment in a Japanese subsidiary.