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Intangible Assets Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 24, 2017
Dec. 25, 2016
Dec. 24, 2017
Dec. 25, 2016
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of Intangible Assets $ 9.9 $ 9.0 $ 19.8 $ 18.4