Trade Accounts Receivable, Unbilled Services and Unearned Income - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Receivables [Abstract] | ||
| Unbilled receivables (percentage) | 71.00% | 69.00% |
| Contract assets (percentage) | 29.00% | 31.00% |
| Increase in unbilled services | $ (73) | |
| Increase in unearned income | 339 | |
| Decrease of net balance of unbilled services and unearned income | (412) | |
| Trade accounts receivable | 704 | $ 678 |
| Cash proceeds from trade accounts | $ 698 | $ 666 |