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Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details)	6 Months Ended
	Jun. 30, 2020 MMBTU $ / MMBTU
FERC Henry Hub Price Swaps Natural Gas Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	18,699
Weighted Average Price Swap	2.69
FERC Henry Hub Price Swaps Natural Gas Q3-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	59,150
Weighted Average Price Swap	2.69
FERC Henry Hub Price Collars Natural Gas Q3-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	180,000
Weighted Average Floor Price	1.96
Weighted Average Ceiling Price	2.45
FERC Henry Hub Price Collars Natural Gas Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	106,055
Weighted Average Floor Price	2.31
Weighted Average Ceiling Price	2.81
PEPL Basis Swaps Natural Gas Q3-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 Q3-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	65,000
Weighted Average Differential To Henry Hub	(0.78)
Houston Ship Channel Natural Gas Basis Swaps Q3-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	30,000
Weighted Average Differential To Henry Hub	(0.02)
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)

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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X

- 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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- 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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- Details

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- Details

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- Details

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- Details

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