v3.7.0.1
Equity, Cash Distributions (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
May 15, 2017
May 05, 2017
Apr. 19, 2017
Mar. 31, 2017
 [1]
Dec. 31, 2016
Distribution Made to Member or Limited Partner          
Quarterly Distribution Per Unit       $ 0.94 $ 0.91
Total Cash Distribution including general partner IDRs (in millions)       $ 140 $ 140
Date of Distribution         Feb. 14, 2017
Unitholders Record Date         Feb. 03, 2017
Subsequent Event          
Distribution Made to Member or Limited Partner          
Date of Distribution [1] May 15, 2017        
Unitholders Record Date [1]   May 05, 2017      
Distribution Made to Limited Partner, Declaration Date     Apr. 19, 2017    
[1] This distribution was declared on April 19, 2017 and will be paid on the date of distribution. This distribution is net of $12.5 million of IDRs waived by TLGP for the three months ended March 31, 2017.