v3.3.1.900
Related-Party Transactions, Summary of Affiliate Transactions (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 20, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Subsequent Event        
Imbalance settlement gains   $ (8) $ (17) $ (8)
Revenues [1]   615 497 273
Operating and maintenance expenses   118 95 81
Imbalance settlement gains and reimbursements from Tesoro [2]   (42) (43) (12)
General and administrative expenses   71 39 20
Reimbursements from Tesoro   34 26 4
Quarterly cash distributions, including IDRs   $ 148 $ 87 $ 44
Quarterly cash distribution        
Subsequent Event        
Cash distributions paid per unit $ 0.7800      
Cash distribution to Tesoro $ 50      
Date of distribution Feb. 12, 2016      
[1] All periods include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.
[2] Includes net imbalance settlement gains of $8 million, $17 million and $8 million in the years ended December 31, 2015, 2014 and 2013, respectively. Also includes reimbursements primarily related to pressure testing and repairs and maintenance costs pursuant to the Amended Omnibus Agreement and the Carson Assets Indemnity Agreement of $34 million, $26 million and $4 million in the years ended December 31, 2015, 2014 and 2013, respectively.