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Investments - Available for Sale Securities (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 30, 2012
Jun. 28, 2014
Equity Securities [Member]
Dec. 18, 2013
Equity Securities [Member]
Jun. 28, 2014
Common Stock [Member]
Jun. 28, 2014
Common Stock [Member]
Other Noncurrent Assets [Member]
Schedule of Available-for-sale Securities [Line Items]              
Ownership percentage         14.60%    
Proceeds from Sale of Available-for-sale Securities, Equity       $ 79.4      
Available-for-sale Securities, Gross Realized Losses       (9.9)      
Available-for-sale Securities, Noncurrent             15.0
Investment Owned, Balance, Shares           2,255,640  
Net unrealized investment gains (losses):              
Equity securities, at cost less impairments 17.1 0 7.6        
Gross unrealized gains 3.8 0 0        
Gross unrealized losses (0.2) 0 (1.1)        
Estimated fair value of equity securities $ 20.7 $ 0 $ 6.5