v3.26.3
EARNINGS (LOSS) PER SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 1 Months Ended 2 Months Ended 3 Months Ended 8 Months Ended 9 Months Ended
Jan. 15, 2025
Jul. 31, 2026
Sep. 27, 2026
Sep. 27, 2026
Sep. 28, 2025
Sep. 27, 2026
Numerator — basic:            
Net income (loss) $ (4) $ 23 $ (13) $ 10 $ 105 $ 23
Less: Net loss attributable to noncontrolling interest     (2) $ (2)   $ (2)
Net loss attributable to Jersey Mike’s Subs Inc. — basic     $ (11)      
Denominator — basic:            
Weighted-average shares of Class A common stock outstanding — basic (in shares)     233 233 [1]   233 [1]
Basic loss per share of Class A common stock (in dollars per share)     $ (0.05) $ (0.05) [1]   $ (0.05) [1]
Numerator — diluted:            
Net loss attributable to Jersey Mike’s Subs Inc. — basic     $ (11)      
Add: Net loss attributable to noncontrolling interests, net of incremental tax     (4)      
Net loss attributable to Jersey Mike’s Subs Inc. — diluted     $ (15)      
Denominator — diluted:            
Weighted-average shares of Class A common stock outstanding — basic (in shares)     233 233 [1]   233 [1]
Effect of dilutive securities:            
Exchange of Common Units (in shares)     84      
Weighted-average shares of Class A common stock outstanding — diluted (in shares)     318 318 [1]   318 [1]
Diluted loss per share of Class A common stock (in dollars per share)     $ (0.05) $ (0.05) [1]   $ (0.05) [1]
[1] Represents earnings (loss) per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period from July 31, 2026 through September 27, 2026, the period following the Reorganization Transactions and IPO. Earnings per share information is not presented for periods prior to the IPO because Jersey Mike’s capital structure before the Reorganization Transactions is not comparable.