v2.4.0.6
Discontinued Operations (Details Textual) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Separation of Downstream Business (Textual) [Abstract]      
Restricted cash     $ 748,000,000
Separation costs incurred   44,000,000  
Special cash distribution from Phillips 66     7,800,000,000
Sales and other operating revenues 14,166,000,000 14,593,000,000  
Purchased commodities 5,834,000,000 6,078,000,000  
Phillips 66 [Member]
     
Separation of Downstream Business (Textual) [Abstract]      
Sales and other operating revenues   4,054,000,000  
Purchased commodities   160,000,000  
Kashagan [Member]
     
Other Discontinued Operations [Abstract]      
Percent interest 8.40%    
Expected proceeds from sale of asset 5,000,000,000    
Impairment of asset held for sale 43,000,000   606,000,000
Carrying Value 5,070,000,000    
Algeria [Member]
     
Other Discontinued Operations [Abstract]      
Expected proceeds from sale of asset 1,750,000,000    
Carrying Value 698,000,000    
Deposit 175,000,000    
Nigeria [Member]
     
Other Discontinued Operations [Abstract]      
Expected proceeds from sale of asset 1,790,000,000    
Carrying Value 317,000,000    
Deposit 435,000,000    
Kashagan, Algeria and Nigeria [Member]
     
Other Discontinued Operations [Abstract]      
Noncurrent assets reclassified to current 7,058,000,000    
Loans and advances-related parties 22,000,000   29,000,000
Deferred income taxes 777,000,000   759,000,000
Asset retirement obligations and accrued environmental costs $ 133,000,000   $ 131,000,000