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Fair Value Measurement (Details Textual) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Fair Value Disclosures [Abstract]
Carrying value long-term debt	$ 3,561.2	$ 2,078.0
Estimated fair value long-term debt	$ 3,730.7	$ 2,170.4

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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