v2.4.0.6
Income Taxes - Components of Deferred Tax Liabilities and Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Deferred Tax Liabilities    
PP&E and intangibles $ 21,159 $ 20,344
Investment in joint ventures 2,943 2,201
Inventory   43
Partnership income deferral 363 434
Other 703 571
Total deferred tax liabilities 25,168 23,593
Deferred Tax Assets    
Benefit plan accruals 2,063 1,691
Asset retirement obligations and accrued environmental costs 4,254 3,971
Inventory 43  
Deferred state income tax 299 257
Other financial accruals and deferrals 618 394
Loss and credit carryforwards 1,608 1,344
Other 692 717
Total deferred tax assets 9,577 8,374
Less valuation allowance (1,487) (1,400)
Net deferred tax assets 8,090 6,974
Net deferred tax liabilities $ 17,078 $ 16,619