Commitments and Contingencies (Details) $ in Millions	Sep. 30, 2022 USD ($) item	Dec. 31, 2021 USD ($)
Commitments and Contingencies.
Accrued obligations for environmental remediation and restoration costs | $	$ 4.1	$ 4.4
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities and Other Liabilities, Other Liabilities, Noncurrent	Accrued Liabilities and Other Liabilities, Other Liabilities, Noncurrent
Environmental claims asserted | item	0