Business, Basis of Presentation and Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue [Line Items]
Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage (less than)	0.30%	0.20%	0.50%	0.20%
Revenue recognition, remaining performance obligations, contract price allocated	$ 7,600		$ 7,600
Contract with customer, unapproved change orders and/or claims, amount	$ 296		$ 296		$ 271
Maximum
Revenue [Line Items]
Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage (less than)			5.00%	5.00%
Change order or claim approval process, term within which expected to be completed			1 year
Revenue Benchmark | Concentration Risk from Type of Arrangement | Master Service and Other Service Agreements
Revenue [Line Items]
Concentration risk, percentage of total	37.00%	52.00%	42.00%	54.00%
Revenue Benchmark | Concentration Risk from Type of Arrangement | Master Service and Other Service Agreements | Point in Time
Revenue [Line Items]
Concentration risk, percentage of total	2.00%	4.00%	3.00%	4.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months		3 months
Revenue recognition, remaining performance obligations, contract price allocated	$ 2,600		$ 2,600