v3.26.3
Segment and Revenue Information - Components of Financial Accounting Standards and Cost Accounting Standards Adjustment (Details) - Unallocated items, eliminations and other - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Line Items]        
FAS/CAS service cost adjustment $ 150 $ 268 $ 460 $ 787
Pension FAS/CAS service cost adjustment        
Segment Reporting [Line Items]        
FAS/CAS service cost adjustment 92 198 277 588
Postretirement FAS/CAS service cost adjustment        
Segment Reporting [Line Items]        
FAS/CAS service cost adjustment $ 58 $ 70 $ 183 $ 199