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Derivative Assets And Liabilities Table - Outstanding Commodity-Related Derivatives (Details)
Sep. 30, 2024
MMbtu
Megawatt
Dec. 31, 2023
MMbtu
Megawatt
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount   (46,975)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Basis Swaps IFERC/NYMEX [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (83,845)  
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Swing Swaps IFERC [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount   (97,728)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Swing Swaps IFERC [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (36,503)  
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Fixed Swaps/Futures [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (1,820) (5,247)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Options - Puts [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount 0  
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Call Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (500) (250)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Forward Physical Contracts [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount   (1,751)
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Forward Physical Contracts [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (2,138)  
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Put Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount   (1,900)
Natural Gas [Member] | Fair Value Hedging [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (49,858) (39,013)
Natural Gas [Member] | Fair Value Hedging [Member] | Fixed Swaps/Futures [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (49,858) (39,013)
Natural Gas [Member] | Fair Value Hedging [Member] | Hedged Item - Inventory (MMBtu) [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount (49,858) (39,013)
Power [Member] | Mark-To-Market Derivatives [Member] | Options - Puts [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt 0  
Power [Member] | Mark-To-Market Derivatives [Member] | Call Option [Member] | Short [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   0
Power [Member] | Mark-To-Market Derivatives [Member] | Forwards Swaps [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt (101,440) (155,600)
Power [Member] | Mark-To-Market Derivatives [Member] | Future [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt   (464,897)
Power [Member] | Mark-To-Market Derivatives [Member] | Future [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt (27,323)  
Power [Member] | Mark-To-Market Derivatives [Member] | Put Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt   (136,000)
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Call Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount   (20)
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Call Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount 0  
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Put Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount   (15)
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Put Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount 0  
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Forward Swaps [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (856) (2,674)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Call Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (21) (43)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Future [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (3,528) (4,548)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Put Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (12)  
NGL/Refined product | Mark-To-Market Derivatives [Member] | Put Option [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount   (121)
NGL/Refined product | Mark-To-Market Derivatives [Member] | Forward Swaps [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount (15,745) (13,870)