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SEGMENT AND GEOGRAPHICAL INFORMATION - Concentration Risk (Details) - Revenue from Contract with Customer Benchmark	3 Months Ended		9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Customer Concentration Risk | Top Ten Customers
Concentration Risk
Concentration risk (as a percent)	49.10%	52.90%	49.50%	50.60%
Customer Concentration Risk | Southern California Edison and Clark County School District | Energy
Concentration Risk
Concentration risk (as a percent)	22.10%
Customer Concentration Risk | Pueblo County School District and Dormitory Authority State of New York | Energy
Concentration Risk
Concentration risk (as a percent)		21.70%
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%
Geographic Concentration Risk | California
Concentration Risk
Concentration risk (as a percent)	42.20%	42.80%	43.30%	42.20%
Geographic Concentration Risk | New York
Concentration Risk
Concentration risk (as a percent)	21.00%	23.60%	23.70%	24.70%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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