Leases (Supplemental Statement of Financial Position Information Related to Leases) (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Leases [Abstract] | ||
| Other accrued liabilities | $ 2 | $ 2 |
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other Accrued Liabilities, Current | Other Accrued Liabilities, Current |
| Operating lease liabilities | $ 19 | $ 20 |
| Total operating lease liabilities | $ 21 | $ 22 |