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Derivative Assets And Liabilities (Outstanding Commodity-Related Derivatives) (Details)
Dec. 31, 2023
BBtu
MB_bls
barrels
MW
Dec. 31, 2022
MW
BBtu
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 (96,828) (202,815)
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume   (15,758)
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Physical Contracts [Member]    
Derivative, Nonmonetary Notional Amount, Volume (1,751)  
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Swing Swaps IFERC [Member]    
Derivative, Nonmonetary Notional Amount, Volume (900) 0
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume (1,878)  
Natural Gas [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume [1] (171,185) (39,563)
Natural Gas [Member] | Short [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume (39,013) (37,448)
Natural Gas [Member] | Short [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume (39,013) (37,448)
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member]    
Derivative, Nonmonetary Notional Amount, Volume (7,125)  
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Basis Swaps IFERC NYMEX [Member]    
Derivative, Nonmonetary Notional Amount, Volume (124,210) (42,440)
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)
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume (1,900) 0
Natural Gas [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume (250) 0
Natural Gas [Member] | Long [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Hedged Item - Inventory (MMBtu) [Member]    
Derivative, Nonmonetary Notional Amount, Volume (39,013) (37,448)
Power [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW (464,897) (21,384)
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW (155,600) 0
Power [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MW (136,000) (119,200)
Natural Gas Liquids [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MB_bls (13,870)  
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)
Refined Products [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Future [Member]    
Derivative, Nonmonetary Notional Amount, Volume | MB_bls (4,548) (3,547)
Crude Oil [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | barrels (2,674)  
Crude Oil [Member] | Long [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Swaps [Member]    
Derivative, Nonmonetary Notional Amount, Volume | barrels   (795)
Commodity Derivatives - Crude [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume (15) 0
Commodity Derivatives - Crude [Member] | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume (20) 0
Commodity Derivatives - NGL/Refined Products | Short [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Calls [Member]    
Derivative, Nonmonetary Notional Amount, Volume (43) 0
Commodity Derivatives - NGL/Refined Products | Long [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member]    
Derivative, Nonmonetary Notional Amount, Volume (121) 0
[1] Includes aggregate amounts for open positions related to Houston Ship Channel, Waha Hub, NGPL TexOk, West Louisiana Zone and Henry Hub locations.