0000001 - Document - COVER PAGE link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - INVENTORIES link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - PROPERTY & EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - GOODWILL & INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - NON-CONTROLLING INTERESTS link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - EQUITY-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - EARNINGS PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - REVENUE RECOGNITION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - PROPERTY & EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - GOODWILL & INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - NON-CONTROLLING INTERESTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - EQUITY-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - EARNINGS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - DESCRIPTION OF BUSINESS (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - REVENUE RECOGNITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - REVENUE RECOGNITION - Schedule of Gift Card Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - INVENTORIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - PROPERTY & EQUIPMENT, NET - Schedule of Property and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - PROPERTY & EQUIPMENT, NET- Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - GOODWILL & INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - GOODWILL & INTANGIBLE ASSETS - Schedule of Intangible Assets, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - GOODWILL & INTANGIBLE ASSETS - Schedule of Aggregate Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - DEBT - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - DEBT - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - DEBT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - NON-CONTROLLING INTERESTS - Schedule of LLC Interest Ownership by Portillo's Inc. and Pre-IPO LLC Members (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - NON-CONTROLLING INTERESTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - NON-CONTROLLING INTERESTS - Schedule of Effects Changes in Ownership in Portillo's OpCo on the Company’s Equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - EQUITY-BASED COMPENSATION - Schedule of Equity-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - EQUITY-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - EARNINGS PER SHARE - Schedule of Basic and Diluted Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - EARNINGS PER SHARE - Schedule of Units Excluded from Calculation of Diluted Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - SEGMENT INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - RELATED PARTY TRANSACTIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - RELATED PARTY TRANSACTIONS - Olo-related Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - RELATED PARTY TRANSACTIONS - Tax Receivable Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - RELATED PARTY TRANSACTIONS - Transactions with Non-Controlling Interest Holders (Details) link:presentationLink link:calculationLink link:definitionLink