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Investments (Tables)
 3 Months Ended
Sep. 26, 2015
Investments [Abstract]  
Unrealized Gain (Loss) on Investments [Table Text Block]
Unrealized investment gains (losses) on available for sale securities were as follows (in millions):
 
September 26, 2015
 
June 27, 2015
Equity securities, at cost less impairments
$
17.1

 
$
17.1

Gross unrealized gains
10.6

 
5.7

Gross unrealized losses
(11.2
)
 
(10.1
)
Estimated fair value of equity securities
$
16.5

 
$
12.7