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Commitments and Contingencies (Details 2)
6 Months Ended 1 Months Ended 39 Months Ended 1 Months Ended 25 Months Ended 1 Months Ended 6 Months Ended 2 Months Ended 6 Months Ended 14 Months Ended
Jun. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Jun. 30, 2014
Minimum
Apr. 30, 2011
Rainbow Pipeline Release
bbl
Jun. 30, 2014
Rainbow Pipeline Release
USD ($)
Feb. 26, 2013
Rainbow Pipeline Release
enforcementaction
Jul. 31, 2014
Rainbow Pipeline Release
Subsequent Event
CAD
Jun. 30, 2012
Rangeland Pipeline Release
bbl
Jun. 30, 2014
Rangeland Pipeline Release
USD ($)
Jul. 04, 2013
Rangeland Pipeline Release
enforcementaction
Jul. 31, 2014
Rangeland Pipeline Release
Subsequent Event
CAD
Feb. 28, 2013
Bay Springs Pipeline Release
bbl
Jun. 30, 2014
Bay Springs Pipeline Release
USD ($)
Jun. 30, 2013
Kemp River Pipeline Release
event
bbl
Jun. 30, 2014
Kemp River Pipeline Release
USD ($)
Jun. 30, 2014
Kemp River Pipeline Release
USD ($)
Environmental                                
Estimated undiscounted reserve for environmental liabilities $ 92,000,000 $ 93,000,000                            
Estimated undiscounted reserve for environmental liabilities, short-term 13,000,000 11,000,000                            
Estimated undiscounted reserve for environmental liabilities, long-term 79,000,000 82,000,000                            
Probable recoveries from insurers and from third parties under indemnification agreements recorded as a receivable 8,000,000 10,000,000                            
Actual cash expenditures for environmental liabilities, period paid     3 years                          
Total estimated cost to clean up and remediate the site, before insurance recoveries                             15,000,000  
Total cost to clean up and remediate the site, before insurance recoveries         70,000,000       47,000,000       6,000,000      
Cost incurred, to date, to clean up and remediate the site, before insurance recoveries                               8,000,000
Estimated size of release (in barrels)       28,000       3,000       120   700    
Settlement charges paid             450,000       850,000          
Charges, fines or penalties assessed                             $ 0 $ 0
Number of enforcement actions           4       4            
Number of events occurred                           2