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Derivative Assets And Liabilities Table - Outstanding Commodity-Related Derivatives (Details)
Mar. 31, 2025
MMbtu
Megawatt
Dec. 31, 2024
MMbtu
Megawatt
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Basis Swaps IFERC/NYMEX [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (880) (3,490)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Swing Swaps IFERC [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (138,780) (156,820)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Fixed Swaps/Futures [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (15,135)  
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Fixed Swaps/Futures [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount   (6,630)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Call Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (600) 0
Natural Gas [Member] | Fair Value Hedging [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (38,945) (47,170)
Natural Gas [Member] | Fair Value Hedging [Member] | Fixed Swaps/Futures [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (38,945) (47,170)
Natural Gas [Member] | Fair Value Hedging [Member] | Hedged Item - Inventory (MMBtu) [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (38,945) (44,170)
Power [Member] | Mark-To-Market Derivatives [Member] | Options - Puts [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt (33,600)  
Power [Member] | Mark-To-Market Derivatives [Member] | Call Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt (14,400) 0
Power [Member] | Mark-To-Market Derivatives [Member] | Forwards Swaps [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt (58,600) (6,040)
Power [Member] | Mark-To-Market Derivatives [Member] | Future [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt (340,545) (140,137)
Power [Member] | Mark-To-Market Derivatives [Member] | Put Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt   (17,600)
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Forward Swaps [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (21,363) (22,512)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Call Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (2) (14)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Future [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (3,064) (1,763)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Put Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount   (9)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Put Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (7)  
NGL/Refined product | Mark-To-Market Derivatives [Member] | Forward Swaps [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (4,819) (15,063)