Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details)	12 Months Ended
Dec. 31, 2020 MMBTU $ / MMBTU
F E R C Henry Hub Prices Collars Natural Gas Q1 Q42021
Derivative [Line Items]
Volume Per Day (MMBtu/d) \| MMBTU	179,055
Weighted Average Floor Price	2.45
Weighted Average Ceiling Price	2.95
F E R C Henry Hub Price Collars Natural Gas Q1 Q42022
Derivative [Line Items]
Volume Per Day (MMBtu/d) \| MMBTU	54,901
Weighted Average Floor Price	2.66
Weighted Average Ceiling Price	3.16
F E R C Henry Hub Price Swaps Natural Gas Q1 Q42021
Derivative [Line Items]
Volume Per Day (MMBtu/d) \| MMBTU	32,699
Weighted Average Price Swap	2.76
F E R C Henry Hub Price Swaps Natural Gas1 Q1 Q42022
Derivative [Line Items]
Volume Per Day (MMBtu/d) \| MMBTU	6,961
Weighted Average Price Swap	2.85
El Paso Natural Gas Basis Swaps Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) \| MMBTU	35,000
Weighted Average Differential To Henry Hub	(0.92)

Weighted average differential to Henry Hub.

No definition available.

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- Definition

The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

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- Definition

The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

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- Details

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- Details

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