Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Assets
Operating lease assets	$ 65	$ 64
Finance lease assets	5	6
Total leased assets	$ 70	$ 70
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets, net	Other assets, net
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net of accumulated depreciation of $8,910 and $8,910	Property, plant and equipment, net of accumulated depreciation of $8,910 and $8,910
Current
Operating	$ 14	$ 15
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Noncurrent
Operating	$ 51	$ 49
Finance	2	3
Total lease liabilities	$ 67	$ 67
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	LONG-TERM DEBT	LONG-TERM DEBT
Weighted-average remaining lease term (years)
Operating leases	5 years 6 months	5 years 4 months 24 days
Finance leases	8 years 8 months 12 days	8 years 4 months 24 days
Weighted-average discount rate
Operating leases	10.24%	10.52%
Finance leases	4.90%	5.05%