Summary of Significant Accounting Policies Other long-term liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Other long term liabilities [Abstract]
Asset Retirement Obligation, Current	$ 13	$ 15
Unrecognized Tax Benefits	5	6
Liability, Retirement and Postemployment Benefits	9	8
Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent	7	7
Pension benefit obligation	2	2
Other long term liabilities	21	23
Other long-term liabilities	$ 57	$ 61