NON-CONTROLLING INTERESTS - Schedule of LLC Interest Ownership by Portillo's Inc. and Pre-IPO LLC Members (Details) - shares |
Mar. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Portillo's Inc. | ||
| Noncontrolling Interest [Line Items] | ||
| Total | 100.00% | 100.00% |
| LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| LLC Interests (in shares) | 73,202,147 | 72,975,301 |
| Portillo's Inc. | Portillo's Inc. | ||
| Noncontrolling Interest [Line Items] | ||
| Ownership % | 84.10% | 76.10% |
| Portillo's Inc. | LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| LLC Interests (in shares) | 61,561,592 | 55,502,375 |
| pre-IPO LLC Members | Portillo's Inc. | ||
| Noncontrolling Interest [Line Items] | ||
| Ownership % | 15.90% | 23.90% |
| pre-IPO LLC Members | LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| LLC Interests (in shares) | 11,640,555 | 17,472,926 |