Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Details)

v3.19.3.a.u2
Fair Value Measurements - Additional Information (Details)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 14, 2019
restaurant
Dec. 30, 2018
USD ($)
restaurant
Dec. 31, 2017
restaurant
Dec. 29, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Number of restaurants impaired | restaurant 29 41 13  
Number of restaurants with immaterial impairments | restaurant   19    
Fair Value, Nonrecurring | Level 3 | Restaurants        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Carrying value of restaurants before impairment | $   $ 34.1   $ 17.3
Fair value of impaired restaurants | $   $ 6.0   $ 2.2