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Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details)	9 Months Ended
	Sep. 30, 2020 MMBTU $ / MMBTU
FERC Henry Hub Price Swaps Natural Gas Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	69,000
Weighted Average Price Swap	2.69
FERC Henry Hub Price Swaps Natural Gas Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	32,699
Weighted Average Price Swap	2.76
FERC Henry Hub Price Swaps Natural Gas Q1 2022 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	14,000
Weighted Average Price Swap	2.85
FERC Henry Hub Price Collars Natural Gas Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	141,000
Weighted Average Floor Price	2.35
Weighted Average Ceiling Price	2.85
FERC Henry Hub Price Collars Natural Gas Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	142,055
Weighted Average Floor Price	2.38
Weighted Average Ceiling Price	2.88
FERC Henry Hub Price Collars Natural Gas Q1 2022 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	36,000
Weighted Average Floor Price	2.60
Weighted Average Ceiling Price	3.10
PEPL Basis Swaps Natural Gas Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	30,000
Weighted Average Differential To Henry Hub	(0.47)
El Paso Natural Gas Basis Swaps Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	65,000
Weighted Average Differential To Henry Hub	(0.78)
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)
Houston Ship Channel Natural Gas Basis Swaps Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	30,000
Weighted Average Differential To Henry Hub	(0.02)

X

- Definition

Weighted average differential to Henry Hub.

+ References

No definition available.

+ Details

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X

- 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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X

- 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

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- 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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