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Loss Per Share (Narrative) (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Mar. 25, 2018
Mar. 26, 2017
Mar. 25, 2018
Mar. 26, 2017
Common Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potential common shares excluded from diluted earnings per share calculation 3.8 11.3 4.4 11.5