INCOME TAXES - Weighted Average Ownership Interest (Details) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 01, 2026 |
Jun. 25, 2025 |
Jul. 01, 2026 |
Jun. 25, 2025 |
|
| Income Tax Disclosure [Abstract] | ||||
| Shake Shack's weighted average ownership percentages (in percent) | 94.30% | 94.30% | 94.30% | 94.30% |