Supplemental Balance Sheet Information - Changes in Timber Licenses (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||
| Beginning balance | $ 8 | $ 23 |
| Amortization | (1) | (1) |
| Ending balance1 | $ 7 | $ 22 |