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Segment Information - Summary of Revenues by Business Lines (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Revenues	$ 1,621,748	$ 1,810,116	$ 4,760,431	$ 5,016,259
Federal Solution Segment
Segment Reporting Information [Line Items]
Revenues	788,607	1,105,580	2,436,628	3,003,791
Federal Solution Segment | Defense And Intelligence
Segment Reporting Information [Line Items]
Revenues	468,935	459,318	1,369,832	1,288,102
Federal Solution Segment | Engineered Systems
Segment Reporting Information [Line Items]
Revenues	319,672	646,262	1,066,796	1,715,689
Critical Infrastructure
Segment Reporting Information [Line Items]
Revenues	833,141	704,536	2,323,803	2,012,468
Critical Infrastructure | Infrastructure - North America
Segment Reporting Information [Line Items]
Revenues	528,564	438,307	1,479,720	1,237,752
Critical Infrastructure | Infrastructure - Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Revenues	$ 304,577	$ 266,229	$ 844,083	$ 774,716

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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