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NON-CONTROLLING INTERESTS - Narrative (Details) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 25, 2023 | Jun. 30, 2024 | Jun. 25, 2023
Portillo's Opco |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Weighted average ownership percentage | 15.90% |  | 24.20% | 18.70% | 27.80%
LLC Units |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Redemption of LLC Interests (in shares) |  | 5,832,371 |  |  |

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- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 + Details
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