Note 6 - Income Taxes (Details) - Tax Effects of Temporary Differences and Carryforwards of Deferred Tax Assets and Liabilities (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Tax Effects of Temporary Differences and Carryforwards of Deferred Tax Assets and Liabilities [Abstract]
Loss and tax credit carryforwards	$ 1,235	$ 1,788
Other Assets	69	63
Asset impairments and restructuring reserves	170	172
Postretirement medical and life benefits	312	290
Fixed assets		85
Other accrued liabilities	246	320
Other employee benefits	473	387
Gross deferred tax assets	2,505	3,105
Valuation allowance	(298)	(286)
Total deferred tax assets	2,207	2,819
Intangible and other assets	(152)	(321)
Fixed assets	(299)
Total deferred tax liabilities	(451)	(321)
Net deferred tax assets	$ 1,756	$ 2,498