v3.20.2

Derivative Financial Instruments (Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements) (Details) bbl in Millions | Jun. 30, 2020 bbl
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Economic Hedges [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 2.3
Economic Hedges Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 0.2

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