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Commitments and Contingencies Contracts and Agreements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Long-term Purchase Commitment [Line Items]
Maximum Exposure for Environmental Remediation under Omnibus Agreement	$ 0.25
Abilene Contract [Member]
Long-term Purchase Commitment [Line Items]
Maximum Purchases under Supply Contract	20,350
East Houston Contract [Member]
Long-term Purchase Commitment [Line Items]
Maximum Purchases under Supply Contract	7,000

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- Definition

Maximum Exposure for Environmental Remediation under Omnibus Agreement

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- Definition

Maximum Purchases under Supply Contract

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No definition available.

+ Details

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- Details

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