v3.8.0.1
Equity, Cash Distributions (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Oct. 18, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Distribution Made to Member or Limited Partner          
Quarterly Distribution Per Unit   $ 0.9852 [1],[2] $ 0.9710 $ 0.9400 $ 0.9100
Total Cash Distribution including general partner IDRs (in millions)   $ 201 $ 147 $ 140 $ 140
Date of Distribution   Nov. 14, 2017 Aug. 14, 2017 May 15, 2017 Feb. 14, 2017
Unitholders Record Date   Nov. 03, 2017 Aug. 04, 2017 May 05, 2017 Feb. 03, 2017
Subsequent Event          
Distribution Made to Member or Limited Partner          
Distribution Made to Limited Partner, Declaration Date Oct. 18, 2017        
[1] (a)Represents cash distributions declared and paid during the nine months ended September 30, 2017, relating to the fourth quarter of 2016 through the second quarter of 2017.
[2] (b)See reconciliation of general partner and limited partner’s earnings to amounts recorded to equity for the periods presented.