INCOME TAXES (Schedule of Deferred Tax Balances) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Income Tax Note [Line Items]
Property, deferred tax assets	$ 102	[1]	$ 629	[1]
Tax loss and credit carryforwards, deferred tax assets	2,294	[1]	1,957	[1]
Postretirement benefit obligations, deferred tax assets	3,916	[1]	3,282	[1]
Other accruals and reserves, deferred tax assets	1,954	[1]	2,101	[1]
Intangibles, deferred tax assets	152	[1]	182	[1]
Inventory, deferred tax assets	229	[1]	149	[1]
Long-term debt, deferred tax assets	0	[1]	3	[1]
Investments, deferred tax assets	186	[1]	174	[1]
Other - net, deferred tax assets	1,185	[1]	986	[1]
Subtotal, deferred tax assets	10,018	[1]	9,463	[1]
Valuation allowances, deferred tax assets	(1,152)	[1]	(682)	[1]
Total, deferred tax assets	8,866	[1]	8,781	[1]
Prepaid tax assets, deferred tax assets	210		100
Property, deferred tax liabilities	2,265		3,084
Postretirement benefit obligations, deferred tax liabilities	1,184		1,099
Other accruals and reserves, deferred tax liabilities	604		545
Intangibles, deferred tax liabilities	1,076		1,615
Inventory, deferred tax liabilities	289		277
Long-term debt, deferred tax liabilities	726		393
Investments, deferred tax liabilities	183		136
Other - net, deferred tax liabilities	729		342
Total, deferred tax liabilities	$ 7,056		$ 7,491

[1] Included in current deferred tax assets are prepaid tax assets totaling $210 million in 2011 and $100 million in 2010.