Debt - Stonepeak Credit Agreement (Details)			12 Months Ended
Debt - Stonepeak Credit Agreement (Details)	Dec. 03, 2025 USD ($)	Dec. 12, 2023 USD ($) item $ / shares shares	Dec. 31, 2025 USD ($) $ / shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 02, 2025 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)
Debt
Principal Balance			$ 250,158,000	$ 300,194,000
Loss on extinguishment of debt			$ 11,515,000	0	$ 5,367,000
Stonepeak Warrant
Debt
Debt issuance amount					100,000,000
Unamortized debt discount		$ 31,800,000
Original issue discount and direct lender fees					$ 31,800,000
Stonepeak Warrants, With Exercise Price Of Dollars 5.50
Debt
Aggregate number of warrant shares (in shares) \| shares		10,000,000
Exercise price of the warrant (in dollars per share) \| $ / shares		$ 5.5
Stonepeak Warrants, With Exercise Price Of Dollars 6.50
Debt
Aggregate number of warrant shares (in shares) \| shares		10,000,000
Exercise price of the warrant (in dollars per share) \| $ / shares		$ 6.5	$ 6.5
Stonepeak Loan Facility
Debt
Interest rate		9.50%
Period of company may elect to payment of interest in kind		2 years
Percentage of interest company may elect to pay in kind		75.00%
Internal rate of return for each lender under loan facility		11.50%
Minimum multiple on invested capital for each lender under credit facility \| item		1.4
Debt issuance costs net		$ 39,300,000
Original issue discount and direct lender fees		6,100,000
Debt issuance costs		$ 1,400,000
Amount of interest to be payable-in-kind			$ 15,000,000
Amount of interest to be payable-in-kind for each quarter							$ 5,000,000	$ 5,000,000	$ 5,000,000
Stonepeak Loan Facility \| If Change In Control Occurs On Or Prior To First Anniversary Of Loan Facility Closing Date
Debt
Change in control premium percentage		20.00%
Stonepeak Loan Facility \| If Change In Control Occurs After First Anniversary Of Loan Facility Closing Date But On Or Prior To Second Anniversary Of Loan Facility Closing Date
Debt
Change in control premium percentage		10.00%
Stonepeak Loan Facility \| If Change In Control Occurs After Second Anniversary Of Loan Facility Closing Date
Debt
Change in control premium percentage		11.50%
Stonepeak Term Loan
Debt
Debt issuance amount		$ 300,000,000
Principal Balance	$ 315,000,000		250,000,000	$ 300,000,000		$ 315,000,000
Voluntarily prepaid amount	65,000,000
Loss on extinguishment of debt	11,500,000		11,500,000
Write-off of unamortized debt discount	6,200,000
Prepayment penalty fees	5,300,000
Stonepeak Term Loan \| Stonepeak Warrant
Debt
Write-off of unamortized debt discount	$ 4,900,000
Stonepeak delayed draw term loan
Debt
Debt issuance amount		$ 100,000,000	100,000,000
Commitment fee		1.00%
Unused commitment fee			2,000,000
Write off the remaining unamortized deferred financing costs			11,300,000
Amount of interest expense			13,300,000
Stonepeak delayed draw term loan \| Stonepeak Warrant
Debt
Write off the remaining unamortized deferred financing costs			$ 10,600,000

Clean Energy Fuels Corp. 10-K