$ 5,643

$ 13,803

(1,887)

(6,305)

3,756

7,498

Liability Derivatives [Abstracts]

4,923

10,184

(1,887)

(6,305)

Commodity-Related Derivatives [Member]

3,036

3,879

Asset Derivatives [Abstracts]

5,312

13,063

(1,556)

(5,565)

3,756

7,498

Liability Derivatives [Abstracts]

4,078

8,132

(1,556)

(5,565)

Interest Rate Swaps [Member]

2,522

2,567

Asset Derivatives [Abstracts]

331

740

(331)

(740)

Liability Derivatives [Abstracts]

845

2,052

(331)

(740)

$ 514

$ 1,312

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.