v3.25.2
Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Disaggregation of Revenue [Line Items]    
Revenue $ 2,924 $ 2,942
Revenue from Contract with Customer Benchmark | Product Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 100.00% 100.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 100.00% 100.00%
Revenue from Contract with Customer Benchmark | Contractor Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 100.00% 100.00%
Prime Contractor    
Disaggregation of Revenue [Line Items]    
Revenue $ 2,741 $ 2,808
Prime Contractor | Revenue from Contract with Customer Benchmark | Contractor Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 94.00% 95.00%
Subcontractor    
Disaggregation of Revenue [Line Items]    
Revenue $ 183 $ 134
Subcontractor | Revenue from Contract with Customer Benchmark | Contractor Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 6.00% 5.00%
Defense Customers    
Disaggregation of Revenue [Line Items]    
Revenue $ 1,517 $ 1,421
Defense Customers | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 51.00% 48.00%
Intelligence Customers    
Disaggregation of Revenue [Line Items]    
Revenue $ 484 $ 457
Intelligence Customers | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 17.00% 16.00%
Civil Customers    
Disaggregation of Revenue [Line Items]    
Revenue $ 923 $ 1,064
Civil Customers | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 32.00% 36.00%
Cost-reimbursable    
Disaggregation of Revenue [Line Items]    
Revenue $ 1,758 $ 1,660
Cost-reimbursable | Revenue from Contract with Customer Benchmark | Product Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 60.00% 56.00%
Time-and-materials    
Disaggregation of Revenue [Line Items]    
Revenue $ 638 $ 671
Time-and-materials | Revenue from Contract with Customer Benchmark | Product Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 22.00% 23.00%
Fixed-price    
Disaggregation of Revenue [Line Items]    
Revenue $ 528 $ 611
Fixed-price | Revenue from Contract with Customer Benchmark | Product Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 18.00% 21.00%