v3.5.0.2
Commitments and Contingencies (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 30, 2014
May 01, 2012
Dec. 31, 2015
Dec. 31, 2014
Changes in Environmental Loss Contingency        
Balance at beginning of year     $ 32  
Additions     25  
Expenditures     (24)  
Balance at end of year     33 $ 32
Aggregate annual deductible     1  
Environmental liability insurance deductible     1  
Environmental liabilities insurance coverage limit     $ 150  
Site contingency, accrual assumptions     Our environmental liabilities are estimates using internal and third-party assessments and available information to date. It is possible these estimates will change as additional information becomes available.  
Tioga Crude Oil Pipeline Release        
Changes in Environmental Loss Contingency        
Balance at beginning of year     $ 25  
Additions     24  
Expenditures     (22)  
Balance at end of year     27 25
Insurance settlement receivable     0 18
Environmental remediation expense     66  
Environmental liability insurance deductible     1  
Environmental liabilities insurance coverage limit     25  
Excess remediation costs over loss limit     41  
Proceeds from insurance reimbursement     18 $ 7
Chevron Corrective Action Order        
Changes in Environmental Loss Contingency        
Diesel Pipeline Release detection and response date       March 18, 2013
Other Liabilities        
Changes in Environmental Loss Contingency        
Balance at beginning of year     7  
Additions     1  
Expenditures     (2)  
Balance at end of year     $ 6 $ 7
PHMSA | Chevron Corrective Action Order        
Changes in Environmental Loss Contingency        
Regulatory action issuance date       Mar. 22, 2013
Los Angeles Logistics Assets Acquisition        
Changes in Environmental Loss Contingency        
Years to identify conditions after the date of purchase (years)     10 years  
Los Angeles Terminal Assets Acquisition        
Changes in Environmental Loss Contingency        
Years to identify conditions after the date of purchase (years)     5 years  
Northwest Products System        
Changes in Environmental Loss Contingency        
Balance at beginning of year     $ 6  
Balance at end of year     4 $ 6
Questar Gas Company v. QEP Field Services Company        
Changes in Environmental Loss Contingency        
Complaint filing date   May 1, 2012    
Disputed amount netted from gathering fees     20  
Liability for estimated damages     $ 21  
Loss Contingency, Settlement Agreement, Date     March 22, 2016  
Payments for Legal Settlements     $ 15  
XTO Energy Inc. v. QEP Field Services Company        
Changes in Environmental Loss Contingency        
Complaint filing date January 30, 2014      
Litigation Settlement, Amount     29  
Proceeds from Legal Settlements     $ 21