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Preferred Units (Details) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 9 Months Ended
Jan. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Payments for Repurchase of Preferred Stock and Preference Stock $ 53 $ 53 $ 0
ETP Preferred Units [Member]      
Partners' Capital Account, Units, Redeemed 1.9