v3.5.0.2
Debt, Revolving Credit Facility (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Jan. 29, 2016
Dec. 31, 2015
Revolving Credit Facility      
Total loan availability $ 1,600    
Maximum loan availability 2,100 $ 1,000  
Revolving credit facility      
Revolving Credit Facility      
Total loan availability 600 $ 900  
Borrowings under Revolving Credit Facility $ 0    
Collateral Our Revolving Credit Facility is non-recourse to Tesoro, except for TLGP, and is guaranteed by all of our consolidated subsidiaries, with the exception of Rendezvous Gas Services L.L.C., and secured by substantially all of our assets.    
Dropdown Credit Facility      
Revolving Credit Facility      
Total loan availability $ 1,000    
Borrowings under Revolving Credit Facility 239    
Line of Credit Facility, Remaining Borrowing Capacity $ 761    
Line Of Credit Facility, Remaining Borrowing Capacity Percentage 76.00%    
Weighted average interest rate 4.51%    
Revolver maturity date Jan. 29, 2021    
Senior Notes [Member]      
Revolving Credit Facility      
Debt Instrument, Unamortized Premium $ 4   $ 4