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Derivative Assets And Liabilities (Outstanding Commodity-Related Derivatives) (Details)
Dec. 31, 2024
MW
BBtu
Dec. 31, 2023
MW
BBtu
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Swing Swaps IFERC [Member]    
Derivative, Nonmonetary Notional Amount, Volume 156,820 97,728
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume (3,490) 46,975
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forward Contracts    
Derivative, Nonmonetary Notional Amount, Volume [1] 0 1,751
Natural Gas [Member] | Short [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume 47,170 39,013
Natural Gas [Member] | Short [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume 47,170 39,013
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume 6,630 5,247
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume 0 1,900
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume 0 250
Natural Gas [Member] | Long [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Hedged Item - Inventory (MMBtu) [Member]    
Derivative, Nonmonetary Notional Amount, Volume 44,170 39,013
Power [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 140,137 464,897
Power [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 17,600  
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 6,040 155,600
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW   136,000
Commodity Derivatives - Crude [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume 0 15
Commodity Derivatives - Crude [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume 0 20
Commodity Derivatives - Crude [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forward Contracts    
Derivative, Nonmonetary Notional Amount, Volume 22,512 2,674
Commodity Derivatives - NGL/Refined Products | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member]    
Derivative, Nonmonetary Notional Amount, Volume 1,763 4,548
Commodity Derivatives - NGL/Refined Products | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume 9  
Commodity Derivatives - NGL/Refined Products | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume 14 43
Commodity Derivatives - NGL/Refined Products | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forward Contracts    
Derivative, Nonmonetary Notional Amount, Volume 15,063 13,870
Commodity Derivatives - NGL/Refined Products | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume   121
[1] Natural gas forward physical contracts are no longer reflected as mark-to-market derivatives in 2024.