v3.26.3
Rates and Other Regulatory Activities (Details)
$ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2026
USD ($)
Dekatherm
Jun. 30, 2023
Sep. 30, 2026
USD ($)
Dekatherm
Sep. 30, 2026
USD ($)
Dekatherm
Dec. 31, 2025
USD ($)
Rates and Other Regulatory Activities [Line Items]          
Base rate increase     $ 46.9 $ 46.9  
RSAM     25.0 25.0  
FCG depr reserve imbalance       $ 6.8  
FCG rate case percent       11.25%  
FCG SAFE revs       $ 16.4  
Number of miles of distribution mains   150   160  
Safety, access, and facility enhancement capital expenditures       $ 205.0  
Safety, access, and facility enhancement additional capital expenditures       50.0  
Total projected capital expenditures       255.0  
Gas utility access and replacement directive related capital expenditures       205.0  
Subsequent Event          
Rates and Other Regulatory Activities [Line Items]          
FCG interim rate relief $ 16.2        
TCJA Impact          
Rates and Other Regulatory Activities [Line Items]          
Regulatory liabilities     82.5 82.5 $ 83.4
Delaware natural gas distribution          
Rates and Other Regulatory Activities [Line Items]          
Permanent rates     $ 12.1 $ 12.1  
Rate case ROE     11.50% 11.50%  
Interim rates     $ 2.5 $ 2.5  
Annual rate case recovery       6.1  
Maryland natural gas distribution          
Rates and Other Regulatory Activities [Line Items]          
Permanent rates     $ 6.9 $ 6.9  
Rate case ROE     11.50% 11.50%  
Annual rate case recovery       $ 2.6  
Incremental rate case recovery       0.9  
Total rate case recovery       3.5  
Florida City Gas          
Rates and Other Regulatory Activities [Line Items]          
Total base rate increase     $ 23.3 23.3  
Base rate increase     14.1 14.1  
Base rate increase - liquefied natural gas facility     3.8 3.8  
Base rate increase base - SAFE investments transfer to base rates     5.3 5.3  
Florida City Gas | Storm Reserve          
Rates and Other Regulatory Activities [Line Items]          
Regulatory liabilities     0.8 0.8  
Florida electric distribution          
Rates and Other Regulatory Activities [Line Items]          
Permanent rates     $ 8.6 $ 8.6  
Rate case ROE     11.30% 11.30%  
Annual rate case recovery       $ 1.8  
Proprosed rates       12.6  
Deferred annual rate case recovery     $ 1.0 1.0  
Step up rate case recovery     0.7 0.7  
Eastern Shore | TCJA Impact          
Rates and Other Regulatory Activities [Line Items]          
Regulatory liabilities     34.2 34.2  
FL Mandatory Relocates          
Rates and Other Regulatory Activities [Line Items]          
Projected revenue       0.6  
Storm Protection Plan | Florida electric distribution          
Rates and Other Regulatory Activities [Line Items]          
Cost recovery storm protection plan     $ 20.4 $ 20.4  
Newberry Expansion | Peninsula pipeline company          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm       8,000  
East Coast Reinforcement Projects: Boynton Beach | Peninsula pipeline company          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm       15,000  
East Coast Reinforcement Projects: New Smyrna Beach | Peninsula pipeline company          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm       3,400  
Central Florida Reinforcement Projects: Plant City | Peninsula pipeline company          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm       5,000  
Central Florida Reinforcement Projects | Peninsula pipeline company          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm       8,700  
St. Cloud Project Amendment | Peninsula pipeline company          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm       10,000  
Florida Energy Pathway | Subsequent Event          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm 250,000        
Estimated project investment cost $ 1,200.0        
Delmar Regional Enhancement          
Rates and Other Regulatory Activities [Line Items]          
Additional firm natural gas transportation deliverability | Dekatherm     15,800