Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	0 Months Ended	3 Months Ended			0 Months Ended	3 Months Ended				0 Months Ended
	Sep. 30, 2014	Oct. 22, 2014 Subsequent Event [Member]	Dec. 31, 2014 E2 Appalachian [Member] Subsequent Event [Member]	Dec. 31, 2014 E2 Energy Services [Member] Subsequent Event [Member]	Sep. 30, 2014 GulfCoast [Member]	Nov. 01, 2014 GulfCoast [Member] Subsequent Event [Member]	Dec. 31, 2014 GulfCoast [Member] Subsequent Event [Member]	Dec. 31, 2014 Class A [Member] E2 Appalachian [Member] Subsequent Event [Member]	Dec. 31, 2014 Class A [Member] E2 Energy Services [Member] Subsequent Event [Member]	Dec. 31, 2014 Class B [Member] E2 Appalachian [Member] Subsequent Event [Member]	Oct. 22, 2014 Noncontrolling Interest E2 Appalachian [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Deposits Assets, Noncurrent					$ 23.5
Payments to Acquire Businesses, Gross			150.0	13.0
Business Acquisition, Effective Date of Acquisition	Mar. 07, 2014	Oct. 22, 2014				Nov. 01, 2014					Oct. 10, 2014
Business acquisition additional percentage acquired								0		0
Business Combination, Consideration Transferred							0
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable			1.0					0	0	0
Payments to Acquire Additional Interest in Subsidiaries								$ 7.0		$ 5.5