Multiemployer Employee Benefit Plans (Details) (Multiemployer Defined Benefit Pension Plans [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Jun. 30, 2012
Multiemployer Plans [Line Items]
Approximate percentage of union representatives on the boards of multiemployer plans	50.00%
Approximate percentage of contributing employer representatives on the boards of multiemployer plans	50.00%
Provisions recorded for multiemployer pension withdrawal liabilities	$ 43.2	$ 5.2
Recorded multiemployer pension withdrawal liability	54.8	47.7	30.7
Aggregate Multiemployer Plan Withdrawal Liability [Member]
Multiemployer Plans [Line Items]
Tax rate for potential IRS non-deductible excise tax	5.00%
Statutory period for company exposure to additional liability after voluntary withdrwal from a multiemployer plan	2 years
Loss contingency, estimate of possible loss	$ 80.0