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Financial Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying value of long-term debt, excluding leases	$ 1,728,983	$ 1,765,892
Fair value of long-term debt, excluding leases	$ 2,005,887	$ 1,902,221

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. 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, and after deducting unamortized discount or premiums, if any.

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