XML 82 R70.htm IDEA: XBRL DOCUMENT v3.7.0.1
Partners' Capital (Cash Distributions) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Feb. 21, 2017
Aug. 15, 2016
Mar. 31, 2017
Mar. 31, 2016
Distribution Made To Managing Member Or General Partner [Line Items]        
Per Unit Distribution (in dollars per share) $ 0.8255 $ 0.8255    
Total Cash Distribution $ 81 $ 82 $ 104 $ 87
Distribution to IDR Holders $ 21 $ 21 $ 21 $ 20