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Earnings Per Share (Narrative) (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Dec. 24, 2017
Dec. 25, 2016
Dec. 24, 2017
Dec. 25, 2016
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 4.1 12.1 5.8 11.5