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Fair Value Disclosures - Additional information (Detail) (5.75% Notes [Member], USD $) In Millions, unless otherwise specified	Sep. 26, 2012	Jun. 27, 2012
5.75% Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	5.75%	5.75%
Carrying value of notes	$ 289.7	$ 289.7
Fair value of notes	$ 310.0	$ 310.2

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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