Summary of Assets and Liabilities at Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Jun. 30, 2012
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and cash equivalents	$ 20.2	$ 19.6
Total assets	20.2	19.6
Current maturities of long-term debt	28.7	0.2
Long-term debt, net of current maturities	177.0	218.0
Total liabilities	205.7	218.2
Quoted Prices in Active Market for Identical Assets (Level 1) [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and cash equivalents	20.2	19.6
Total assets	20.2	19.6
Current maturities of long-term debt	0	0
Long-term debt, net of current maturities	0	0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and cash equivalents	0	0
Total assets	0	0
Current maturities of long-term debt	28.7	0.2
Long-term debt, net of current maturities	177.0	218.0
Total liabilities	$ 205.7	$ 218.2