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Derivative Assets And Liabilities Table - Outstanding Commodity-Related Derivatives (Details) | Sep. 30, 2021 MMbtu Megawatt barrels bbl | Dec. 31, 2020 MMbtu Megawatt bbl barrels
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Natural Gas Liquids [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forwards Swaps [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount | bbl |  |  | 5,840
Natural Gas Liquids [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forwards Swaps [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | bbl |  | 2,785 |
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 8,893 | 29,173
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Swing Swaps IFERC [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 48,675 |
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Swing Swaps IFERC [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  |  | 11,208
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 45,588 | 53,575
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forward Physical Contracts [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 10,071 | 11,861
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount | [1] | 81,963 | 44,225
Natural Gas [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Fixed Swaps/Futures [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 475 | 1,603
Natural Gas [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Basis Swaps IFERC/NYMEX [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 21,255 | 30,113
Natural Gas [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Fixed Swaps/Futures [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 21,255 | 30,113
Natural Gas [Member] | Fair Value Hedging [Member] | Non Trading [Member] | Hedged Item - Inventory (MMBtu) [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount |  | 21,255 | 30,113
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Options - Puts [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | Megawatt |  | 290,400 |
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Call Option [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | Megawatt |  | 36,704 | 2,343,293
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Forwards Swaps [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | Megawatt |  | 712,400 | 1,392,400
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount | Megawatt |  | 640,800 |
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Future [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | Megawatt |  |  | 18,706
Power [Member] | Mark-To-Market Derivatives [Member] | Trading [Member] | Put Option [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | Megawatt |  |  | 519,071
Crude Oil [Member] | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Forwards Swaps [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount | bbl |  | 1,693 | 0
Refined product sales | Mark-To-Market Derivatives [Member] | Non Trading [Member] | Future [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount | barrels |  | 3,272 | 2,765
[1] | Includes aggregate amounts for open positions related to Houston Ship Channel, Waha Hub, NGPL TexOk, West Louisiana Zone and Henry Hub locations.

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