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Derivative Financial Instruments (Schedule Of Open NGL Derivative Positions) (Details)	6 Months Ended
	Jun. 30, 2019 $ / bbl bbl
OPIS Mont Belvieu Texas Ethane Price Swaps NGL Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	1,000
Weighted Average Price Swap | $ / bbl	11.55
OPIS Mont Belvieu Texas Natural Gasoline Price Swaps NGL Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	4,500
Weighted Average Price Swap | $ / bbl	55.93
OPIS Mont Belvieu Texas Normal Butane Price Swaps NGL Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	4,000
Weighted Average Price Swap | $ / bbl	33.69
OPIS Mont Belvieu Texas Propane Price Swaps NGL Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	8,500
Weighted Average Price Swap | $ / bbl	30.01
OPIS Mont Belvieu Texas Propane Price Swaps NGL Q1-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) | bbl	2,500
Weighted Average Price Swap | $ / bbl	27.29

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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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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

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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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