NON-CONTROLLING INTERESTS - Schedule of LLC Interest Ownership by Portillo's Inc. and Pre-IPO LLC Members (Details) - shares |
Mar. 30, 2025 |
Dec. 29, 2024 |
|---|---|---|
| Portillo's Inc. | ||
| Noncontrolling Interest [Line Items] | ||
| Total | 100.00% | 100.00% |
| LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| LLC Interests (in shares) | 74,637,930 | 74,407,379 |
| Portillo's Inc. | Portillo's Inc. | ||
| Noncontrolling Interest [Line Items] | ||
| Ownership % | 85.60% | 85.60% |
| Portillo's Inc. | LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| LLC Interests (in shares) | 63,905,130 | 63,674,579 |
| pre-IPO LLC Members | Portillo's Inc. | ||
| Noncontrolling Interest [Line Items] | ||
| Ownership % | 14.40% | 14.40% |
| pre-IPO LLC Members | LLC Units | ||
| Noncontrolling Interest [Line Items] | ||
| LLC Interests (in shares) | 10,732,800 | 10,732,800 |