Note 1 - Summary of Significant Accounting Policies - Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accruals for capital expenditures		$ 381	$ 298	$ 358
Interest (1)	[1]	184	178	171
Income taxes, net of refunds received		$ 293	$ 253	$ 577

[1] Included in this amount are approximately $23 million, $35 million and $40 million of interest costs that were capitalized as part of property, plant and equipment, net of accumulated depreciation, in 2016, 2015 and 2014, respectively.