Fair Value Measurements - Summary of Assets and Liabilities at Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Jun. 30, 2012
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and cash equivalents	$ 23.7	$ 19.6
Total assets	23.7	19.6
Current maturities of long-term debt	23.8	0.2
Long-term debt, net of current maturities	196.5	218.0
Total liabilities	220.3	218.2
Level 1 [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and cash equivalents	23.7	19.6
Total assets	23.7	19.6
Current maturities of long-term debt	0	0
Long-term debt, net of current maturities	0	0
Total liabilities	0	0
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	23.8	0.2
Long-term debt, net of current maturities	196.5	218.0
Total liabilities	$ 220.3	$ 218.2