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Guarantees (Narrative) (Details) (USD $) In Millions	12 Months Ended
Guarantees (Narrative) (Details) (USD $) In Millions	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Guarantees
Outstanding debt of joint venture	$ 24.6
Equity method investment, equity in earnings	1.6	0.4	1.0
Royalty income	6.2	5.4	5.1
Total contingent liability for standby letters of credit, issued and outstanding	$ 11.4	$ 20.0

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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