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Fair Value Measurements - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 26, 2018
USD ($)
restaurant
Dec. 27, 2017
USD ($)
restaurant
Sep. 27, 2017
USD ($)
Dec. 26, 2018
USD ($)
Dec. 27, 2017
USD ($)
Jun. 27, 2018
USD ($)
Schedule of Impairments [Line Items]            
Carrying Value Of Impaired Long Lived Assets $ 1.0       $ 8.3  
Carrying value of reacquired franchise rights         1.2  
Fair value of impaired long lived assets 0.0 $ 0.3   $ 0.0 0.3  
Restaurant impairment charges 1.0 $ 2.0 $ 7.2 1.0 9.2  
Goodwill, Impairment Loss       0.0 0.0  
Finite-Lived Intangible Assets, Accumulated Amortization $ 6.3     6.3   $ 5.7
Liquor Licenses [Member]            
Schedule of Impairments [Line Items]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)       $ 0.0 $ 0.0  
Chili's Restaurants [Member]            
Schedule of Impairments [Line Items]            
Number Of Underperforming Restaurants | restaurant 2 9