Quarterly report [Sections 13 or 15(d)]

Basis of Presentation and Significant Accounting Policies - Narrative (Details)

v3.25.1
Basis of Presentation and Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Oct. 18, 2024
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Related Party Transaction [Line Items]        
Allowance for doubtful accounts specific reserves, additions   $ 0.1 $ 0.2  
Fair Value, Inputs, Level 1        
Related Party Transaction [Line Items]        
Cash equivalents at fair value   39.5   $ 56.5
Puerto Rico Electric Power Authority (PREPA)        
Related Party Transaction [Line Items]        
Interest income on delinquent accounts     $ 10.5  
Puerto Rico Electric Power Authority (PREPA) | Cobra Acquisitions        
Related Party Transaction [Line Items]        
Allowance for doubtful accounts specific reserves       170.7
Proceeds from PREPA under settlement agreement $ 18.4     $ 168.4
Second installment of administrative expense claim pending   $ 20.0    
Minimum        
Related Party Transaction [Line Items]        
Accounts receivable, threshold period delinquent   30 days    
Maximum        
Related Party Transaction [Line Items]        
Accounts receivable, threshold period delinquent   60 days