v3.4.0.3
Related-Party Transactions, Summary of Affiliate Transactions (Details) - USD ($)
$ in Millions
 3 Months Ended
May. 13, 2016
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Related Party Transactions        
Cost of Reimbursable Expense   $ 6   $ 6
Distribution Made to Limited Partner, Distribution Date     Feb. 12, 2016  
Revenues [1]   169   148
Operating and maintenance expenses   37   29
Imbalance settlement gains and reimbursements from Tesoro [2]   7   8
General and administrative expenses   $ 17   $ 17
Subsequent Event        
Related Party Transactions        
Distribution Made to Limited Partner, Distribution Date May 13, 2016      
[1] Tesoro accounted for 56% of our total revenues for both the three months ended March 31, 2016 and 2015.
[2] Includes imbalance settlement gains of $1 million and $2 million for the three months ended March 31, 2016 and 2015, respectively. Also includes reimbursements from Tesoro pursuant predominantly to the Amended Omnibus Agreement and the Carson Assets Indemnity Agreement of $6 million for both the three months ended March 31, 2016 and 2015.