PROPERTY (Schedule of Property) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property	$ 57,438	$ 50,802
Land [Member]
Property, Plant and Equipment [Line Items]
Property	1,157	855
Land and waterway improvements [Member]
Property, Plant and Equipment [Line Items]
Property	1,367	1,282
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property	5,935	4,793
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property	38,499	35,454
Utility and Supply Lines [Member]
Property, Plant and Equipment [Line Items]
Property	2,117	2,053
Other property [Member]
Property, Plant and Equipment [Line Items]
Property	2,263	2,010
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property	$ 6,100	$ 4,355
Minimum [Member] | Land and waterway improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] | Utility and Supply Lines [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum [Member] | Other property [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member] | Land and waterway improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	55 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Maximum [Member] | Utility and Supply Lines [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Maximum [Member] | Other property [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	50 years