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SEGMENT AND GEOGRAPHICAL INFORMATION - Concentration Risk (Details) | 12 Months Ended
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Dec. 27, 2024 | Dec. 29, 2023 | Dec. 30, 2022
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Top Ten Customers |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) | 51.30% | 52.70% | 54.60%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Southern California Edison | Energy |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) | 10.70% |  |
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Los Angeles Department of Water and Power |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) |  |  | 12.00%
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | California |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) | 43.90% | 45.10% | 41.70%
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | New York |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) | 23.60% | 24.70% | 22.80%
Revenue from Contract with Customer, Segment Benchmark | Customer Concentration Risk | Los Angeles Department of Water and Power | Energy |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) |  |  | 14.40%
Revenue from Contract with Customer, Segment Benchmark | Customer Concentration Risk | Los Angeles Department of Water and Power, and The Dormitory Authority State of New York | Energy |  |  |
Concentration Risk |  |  |
Concentration risk (as a percent) |  | 22.70% |

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