v3.26.1
Debt - Department of Energy Loan Guarantee (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Debt Instrument [Line Items]    
Repayments of long-term debt $ 503,215 $ 209,568
Secured Debt | Department of Energy Guarantee    
Debt Instrument [Line Items]    
Aggregate borrowings including capitalized interest 3,848,178  
FFB | Secured Debt    
Debt Instrument [Line Items]    
Maximum borrowing capacity designated for capitalized interest 4,633,028  
Repayments of long-term debt $ 784,850