Equity Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		4 Months Ended	12 Months Ended						3 Months Ended				1 Months Ended	3 Months Ended		1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	May 01, 2014	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2014 ETP [Member]	Mar. 31, 2014 ETP [Member] Distribution Reinvestment Plan [Member]	Apr. 30, 2014 Regency [Member]	Mar. 31, 2014 Regency [Member]	Apr. 30, 2014 Equity distribution agreement [Member] ETP [Member]	Mar. 31, 2014 Equity distribution agreement [Member] ETP [Member]	Mar. 31, 2014 Equity distribution agreement [Member] Regency [Member]	Feb. 28, 2014 Hoover Midstream Acquisition [Member] Common Units [Member] Regency [Member]	Mar. 21, 2014 PVR Acquisition [Member] Common Units [Member] Regency [Member]
Units repurchased under buyback program	$ (366)		$ 750
Equity Distribution Reinvestment Program, Capacity, Shares											1,400,000
Gain on Sale of Previously Unissued Stock by Subsidiary	603	10
Partners' Capital Account, Units, Redeemed										(18,700,000)
Equity Distribution Agreement Program, Capacity Remaining, Dollar Amount												400	0
Relinquishment of Rights of Incentive Distributions	26			35	45	50	72	51	80
Proceeds from Issuance of Common Stock														38	106	34
Fees and Commissions															1
Stock Issued During Period, Value, Dividend Reinvestment Plan										$ 36
Stock Issued During Period, Shares, Dividend Reinvestment Plan										700,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares																	4,040,471	140,400,000