Contingent Liabilities (Details Textual) (USD $)	1 Months Ended						0 Months Ended
	May 30, 2014	Sep. 30, 2014	Apr. 18, 2014	Sep. 30, 2014 Environmental Protection Agency [Member]	Sep. 30, 2014 Former Operations	Sep. 30, 2014 Natural gas underground storage facilities	Sep. 12, 2014 Geismar Incident [Member]	Dec. 11, 2013 Geismar Incident [Member]
Loss Contingencies [Line Items]
Proceeds from Legal Settlements	$ 42,000,000
Accrued Environmental Loss liabilities		43,000,000		11,000,000	26,000,000	6,000,000
Notice of Penalty								99,000
Amount we will pay under settlement agreement							36,000
Loss Contingency, Range of Possible Loss		32,000,000
Customer Refund Paid			$ 118,000,000