Commitments and Contingencies Legal Proceedings and Settlements (Details)	3 Months Ended
	Mar. 31, 2014
Whistler Junction Matter [Member]
Loss Contingencies [Line Items]
Number of Lawsuits Filed (in ones)	9
Number of Class Action Lawsuits Filed (in ones)	1
Southeast Louisiana Flood Protection Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants (in ones)	100