Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) (USD $)	12 Months Ended
Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Long-term Debt, Other Disclosures [Abstract]
2013	$ 994,000
2014	867,000
2015	266,000
2016	270,000
2017	271,000
Thereafter	794,254,000
Total debt	796,922,000	490,765,000
Gross interest expense	39,000,000	33,700,000	34,200,000
Amortization of deferred financing costs	2,000,000	1,900,000	1,700,000
Interest capitalized	$ 0	$ 100,000	$ 600,000

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.

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