PROPERTY (Schedule of Property) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property	$ 52,216	$ 51,648
Land [Member]
Property, Plant and Equipment [Line Items]
Property	862	893
Land and waterway improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum (years)	15
Estimated useful lives, maximum (years)	25
Property	1,310	1,264
Buildings [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum (years)	5
Estimated useful lives, maximum (years)	55
Property	4,513	4,442
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum (years)	3
Estimated useful lives, maximum (years)	20
Property	37,580	37,224
Utility and Supply Lines [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum (years)	5
Estimated useful lives, maximum (years)	20
Property	2,264	2,229
Other property [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, minimum (years)	3
Estimated useful lives, maximum (years)	30
Property	2,290	2,133
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property	$ 3,397	$ 3,463