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Derivative Assets And Liabilities (Outstanding Commodity-Related Derivatives) (Details)
Dec. 31, 2022
BBtu
MW
MB_bls
barrels
Dec. 31, 2021
BBtu
MW
MB_bls
barrels
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Swing Swaps IFERC [Member]    
Derivative, Nonmonetary Notional Amount, Volume 202,815 106,333
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume 15,758 63,898
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Physical Contracts [Member]    
Derivative, Nonmonetary Notional Amount, Volume   5,950
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume [1] 39,563 66,665
Natural Gas [Member] | Short [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume 37,448 40,533
Natural Gas [Member] | Short [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume 37,448 40,533
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume 42,440 6,738
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Physical Contracts [Member]    
Derivative, Nonmonetary Notional Amount, Volume 2,423  
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume 145 585
Natural Gas [Member] | Long [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Hedged Item - Inventory (MMBtu) [Member]    
Derivative, Nonmonetary Notional Amount, Volume 37,448 40,533
Power [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW   30,932
Power [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 21,384 604,920
Power [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW   7,859
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 0  
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 0 653,000
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW 119,200  
Natural Gas Liquids [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MB_bls 6,934 8,493
Refined Products [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Future [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MB_bls 3,547 3,349
Crude Oil [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | barrels 795 3,672
[1] Includes aggregate amounts for open positions related to Houston Ship Channel, Waha Hub, NGPL TexOk, West Louisiana Zone and Henry Hub locations.