REVENUE RECOGNITION AND RELATED BALANCE SHEET ACCOUNTS - Revenue Disaggregated by Geographic Location and Contract Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 28,479,697	$ 23,672,795	$ 20,882,206
Percentage of total revenues	100.00%	100.00%	100.00%
United States
Disaggregation of Revenue [Line Items]
Revenues	$ 26,482,963	$ 21,606,807	$ 17,910,892
Percentage of total revenues	93.00%	91.30%	85.80%
Canada
Disaggregation of Revenue [Line Items]
Revenues	$ 1,018,752	$ 1,025,074	$ 2,045,999
Percentage of total revenues	3.60%	4.30%	9.80%
Australia
Disaggregation of Revenue [Line Items]
Revenues	$ 779,532	$ 666,870	$ 612,497
Percentage of total revenues	2.70%	2.80%	2.90%
Others
Disaggregation of Revenue [Line Items]
Revenues	$ 198,450	$ 374,044	$ 312,818
Percentage of total revenues	0.70%	1.60%	1.50%
Fixed price contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 17,258,996	$ 13,307,321	$ 10,251,037
Percentage of total revenues	60.60%	56.20%	49.10%
Unit-price contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 6,790,221	$ 6,475,714	$ 6,586,982
Percentage of total revenues	23.80%	27.40%	31.50%
Cost-plus contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 4,430,480	$ 3,889,760	$ 4,044,187
Percentage of total revenues	15.60%	16.40%	19.40%