Commitments and Contingencies (Contingencies Related to Acquisition) (Details)	12 Months Ended
	Dec. 31, 2013
Business Acquisition [Line Items]
Mandatory Redemption Date 2	Dec. 31, 2013
Lig Pipeline [Member]
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Apr. 01, 2004
Business Acquisition, Name of Acquired Entity	LIG Pipeline Company
Environmental Remediation Sites, No Further Remediation Required [Member]
Business Acquisition [Line Items]
Site Contingency, Number of Sites	23
Total [Member]
Business Acquisition [Line Items]
Site Contingency, Number of Sites	25
Environmental Remediation Sites, Continuing Remediation Required [Member]
Business Acquisition [Line Items]
Site Contingency, Number of Sites	2