v2.4.0.6
Separation of Downstream Business - Carrying Value of Major Categories of Assets and Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Liabilities      
Sales and other operating revenues from discontinued operations $ 196,068 $ 146,542 $ 112,675
Income from discontinued operations before-tax 6,776 1,438 868
Income tax expense 1,729 470 173
Income from discontinued operations 5,047 [1] 968 [1] 695 [1]
Planned Separation of Downstream Business [Member]
      
Assets      
Cash and cash equivalents        
Accounts and notes receivable 8,353 8,362  
Accounts and notes receivable-related parties 1,671 1,849  
Inventories 3,403 4,062  
Prepaid expenses and other current assets 443 352  
Total current assets of discontinued operations 13,870 14,625  
Investments and long-term receivables 10,304 9,917  
Loans and advances-related parties 1 401  
Net properties, plants and equipment 15,047 15,670  
Goodwill 3,332 3,633  
Intangibles 732 777  
Other assets 121 112  
Total assets of discontinued operations 43,407 45,135  
Liabilities      
Accounts payable 10,007 9,816  
Accounts payable-related parties 785 937  
Short-term debt 30 29  
Accrued income and other taxes 967 995  
Employee benefit obligations 76 98  
Other accruals 411 452  
Total current liabilities of discontinued operations 12,276 12,327  
Long-term debt 361 388  
Asset retirement obligations and accrued environmental costs 787 802  
Deferred income taxes 5,533 4,698  
Employee benefit obligations 1,057 702  
Other liabilities and deferred credits 417 274  
Total liabilities of discontinued operations $ 20,431 $ 19,191  
[1] *Net of provision for income taxes on discontinued operations of: $1,729, $470, $173.