Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Third-party lessee payment lag for oil and natural gas delivery	90 days
Change in prior period estimate	$ 0.0	$ 0.0
Performance obligations satisfied in prior period, amount recognized	1.5	$ 0.0
Contract assets recognized	0.0
Thacker Pass
Disaggregation of Revenue [Line Items]
Advance paid	3.5
Cost reimbursement, commercial mining milestone, fee	$ 4.7