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Derivative Financial Instruments - Volume of Commodity Derivative Activity (Details) - Not Designated as Hedging Instrument [Member] - Commodity contracts	Mar. 31, 2018 MMBTU gal
Short
Derivative [Line Items]
Nonmonetary Notional Amount of Price Risk Derivatives of Natural Gas Liquids | gal	7,696,503
Long
Derivative [Line Items]
Nonmonetary Notional Amount of Price Risk Derivatives Of Natural Gas | MMBTU	745,045

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- Definition

Nonmonetary Notional Amount Of Price Risk Derivatives Of Natural Gas

+ References

No definition available.

+ Details

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X

- Definition

Aggregate notional amount of natural gas liquids price risk derivatives for instruments with notional amounts expressed in nonmonetary units.

+ 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

No definition available.

+ Details

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- Details

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- Details

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