Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Oct. 01, 2011
Multi-Employer Plan Withdrawal Liability [Member]
Loss contingency, estimate of possible loss	$ 210.0
Tax rate for potential IRS non-deductible excise tax	5.00%
Loss contingency, recorded amount	46.9
Fuel Commitments [Member]
Minimum amount committed under significant purchase commitment	$ 91.7