NON-CONTROLLING INTERESTS - Narrative (Details) - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2024 |
Mar. 26, 2023 |
|
| Portillo's Opco | ||
| Noncontrolling Interest [Line Items] | ||
| Weighted average ownership percentage | 21.40% | 31.40% |
| LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| Redemption of LLC Interests (in shares) | 5,832,371 | |