Summary of Significant Accounting Policies Other long-term liabilities (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Other long term liabilities [Abstract]
Asset Retirement Obligation, Current	$ 8,000,000	$ 10,000,000
Unrecognized Tax Benefits	9,000,000	9,000,000
Liability, Retirement and Postemployment Benefits	9,000,000	9,000,000
Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent	12,000,000	17,000,000
Long-term portion of warranty reserves	6,000,000	6,000,000
Other long term liabilities	61,000,000	35,000,000
Other long-term liabilities	$ 105,000,000	$ 86,000,000