DESCRIPTION OF BUSINESS	3 Months Ended
Mar. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS Portillo’s Inc. ("Inc.") was formed and incorporated as a Delaware corporation on June 8, 2021. Inc. was formed for the purpose of completing an initial public offering ("IPO") and related reorganization transactions in order to carry on the business of PHD Group Holdings LLC and its subsidiaries ("Portillo's OpCo"). Portillo's Inc. is the sole managing member of Portillo’s OpCo, and as sole managing member, Inc. operates and controls all of the business and affairs of Portillo's OpCo and reports a non-controlling interest representing the economic interest in Portillo's OpCo held by the other members of Portillo's OpCo (the "pre-IPO LLC Members"). Unless the context otherwise requires, references to "we," "us," "our," "Portillo's," and the "Company" refer to Portillo's Inc. and its subsidiaries, including Portillo's OpCo. The Company operates restaurants in 10 states that serve Chicago-style hot dogs and sausages, Italian beef sandwiches, char-grilled burgers, chopped salads, crinkle-cut fries, homemade chocolate cake and more, along with two food production commissaries in Illinois. As of March 30, 2025 and December 29, 2024, the Company had 93 restaurants in operation. The Company also had two non-traditional locations in operation as of March 30, 2025 and December 29, 2024. These non-traditional locations include a food truck and a ghost kitchen (small kitchen with no store-front presence, used to fill online orders). Portillo's additionally has a 50% interest in a single restaurant owned by C&O Chicago, L.L.C. ("C&O"), which is excluded from the Company's restaurant count noted above. The Company’s principal corporate offices are located in Oak Brook, Illinois.

Portillo’s Inc. ("Inc.") was formed and incorporated as a Delaware corporation on June 8, 2021. Inc. was formed for the purpose of completing an initial public offering ("IPO") and related reorganization transactions in order to carry on the business of PHD Group Holdings LLC and its subsidiaries ("Portillo's OpCo"). Portillo's Inc. is the sole managing member of Portillo’s OpCo, and as sole managing member, Inc. operates and controls all of the business and affairs of Portillo's OpCo and reports a non-controlling interest representing the economic interest in Portillo's OpCo held by the other members of Portillo's OpCo (the "pre-IPO LLC Members"). Unless the context otherwise requires, references to "we," "us," "our," "Portillo's," and the "Company" refer to Portillo's Inc. and its subsidiaries, including Portillo's OpCo.

The Company operates restaurants in 10 states that serve Chicago-style hot dogs and sausages, Italian beef sandwiches, char-grilled burgers, chopped salads, crinkle-cut fries, homemade chocolate cake and more, along with two food production commissaries in Illinois. As of March 30, 2025 and December 29, 2024, the Company had 93 restaurants in operation. The Company also had two non-traditional locations in operation as of March 30, 2025 and December 29, 2024. These non-traditional locations include a food truck and a ghost kitchen (small kitchen with no store-front presence, used to fill online orders). Portillo's additionally has a 50% interest in a single restaurant owned by C&O Chicago, L.L.C. ("C&O"), which is excluded from the Company's restaurant count noted above. The Company’s principal corporate offices are located in Oak Brook, Illinois.