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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2011
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
7.
PROPERTY, PLANT AND EQUIPMENT
Major classes of property, plant and equipment, which include capital lease assets, consisted of the following (in millions):
 
 
December 31,
 
 
2011
 
2010
Land
 
$
722

 
$
624

Crude oil processing facilities
 
23,322

 
21,421

Pipeline and terminal facilities
 
856

 
709

Grain processing equipment
 
673

 
656

Retail facilities
 
1,346

 
1,277

Administrative buildings
 
712

 
705

Other
 
1,290

 
1,226

Construction in progress
 
3,332

 
2,303

Property, plant and equipment, at cost
 
32,253

 
28,921

Accumulated depreciation
 
(7,076
)
 
(6,252
)
Property, plant and equipment, net
 
$
25,177

 
$
22,669