Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Jun. 30, 2012
Other assets:
Total assets	$ 23.7	$ 19.6
Accrued expenses:
Total liabilities	220.3	218.2
Fair Value, Measurements, Recurring [Member]
Other assets:
Money market mutual funds	3.1	3.2
Equity and fixed income mutual funds	21.6	18.9
Cash surrender value of life insurance policies	13.3	13.0
Derivative financial instruments	0.6	0
Total assets	38.6	35.1
Accrued expenses:
Derivative financial instruments	1.6	1.4
Total liabilities	1.6	1.4
Level 1 [Member]
Other assets:
Total assets	23.7	19.6
Accrued expenses:
Total liabilities	0	0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Other assets:
Money market mutual funds	3.1	3.2
Equity and fixed income mutual funds	21.6	18.9
Cash surrender value of life insurance policies	0	0
Derivative financial instruments	0	0
Total assets	24.7	22.1
Accrued expenses:
Derivative financial instruments	0	0
Total liabilities	0	0
Level 2 [Member]
Other assets:
Total assets	0	0
Accrued expenses:
Total liabilities	220.3	218.2
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Other assets:
Money market mutual funds	0	0
Equity and fixed income mutual funds	0	0
Cash surrender value of life insurance policies	13.3	13.0
Derivative financial instruments	0.6	0
Total assets	13.9	13.0
Accrued expenses:
Derivative financial instruments	1.6	1.4
Total liabilities	$ 1.6	$ 1.4