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Derivative Assets And Liabilities Table - Outstanding Commodity-Related Derivatives (Details)
Mar. 31, 2022
bbl
MMbtu
barrels
Megawatt
Dec. 31, 2021
MMbtu
bbl
Megawatt
barrels
Natural Gas Liquids [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forwards Swaps [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | bbl 10,709 8,493
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Basis Swaps IFERC/NYMEX [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount 13,505 6,738
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Swing Swaps IFERC [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount 27,273 106,333
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount 2,238 63,898
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Physical Contracts [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount 16,437 5,950
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount [1] 14,598 66,665
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Fixed Swaps/Futures [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount 605 585
Natural Gas [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount 18,675 40,533
Natural Gas [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount 18,675 40,533
Natural Gas [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Hedged Item - Inventory (MMBtu) [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount 18,675 40,533
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Puts [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt 119,200  
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Call Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt 238,400 30,932
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forwards Swaps [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt 709,920 653,000
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt 555,582 604,920
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | Megawatt   7,859
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forwards Swaps [Member] | Long [Member]    
Derivative, Nonmonetary Notional Amount | bbl 2,639 3,672
Refined product sales | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Future [Member] | Short [Member]    
Derivative, Nonmonetary Notional Amount | barrels 4,225 3,349
[1] Includes aggregate amounts for open positions related to Houston Ship Channel, Waha Hub, NGPL TexOk, West Louisiana Zone and Henry Hub locations.