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 | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| FAS/CAS service cost adjustment | $ 257 | $ 302 | $ 519 | $ 604 |
| Pension FAS/CAS service cost adjustment | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| FAS/CAS service cost adjustment | 197 | 230 | 390 | 460 |
| Postretirement FAS/CAS service cost adjustment | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| FAS/CAS service cost adjustment | $ 60 | $ 72 | $ 129 | $ 144 |