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Business, Basis of Presentation and Significant Accounting Policies - Revenue Recognition (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Revenue [Line Items]          
Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage (less than) 0.40% 1.50% 0.20% 0.60%  
Revenue recognition, remaining performance obligations, contract price allocated $ 9,300   $ 9,300    
Contract with customer, unapproved change orders and/or claims, amount $ 175   $ 175   $ 194
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 40.00% 43.00% 40.00% 45.00%  
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% 3.00% 2.00% 3.00%  
Revenue Benchmark | Performance Obligation Concentration Risk | Performance Obligation, Timing Of Recognition, Remainder Of Year          
Revenue [Line Items]          
Concentration risk, percentage of total     45.00%    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01          
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]: 2024-07-01          
Revenue [Line Items]          
Revenue, remaining performance obligation, expected timing of satisfaction, period 6 months   6 months    
Revenue recognition, remaining performance obligations, contract price allocated $ 4,200   $ 4,200    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01          
Revenue [Line Items]          
Revenue, remaining performance obligation, expected timing of satisfaction, period 2 years   2 years    
Revenue recognition, remaining performance obligations, contract price allocated $ 5,100   $ 5,100