Note 17 - Amounts Recognized in Accumulated Other Comprehensive Loss For All Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
U.S. [Member]
Amounts Recognized In Accumulated Other Comprehensive Loss For All Major Funded And Unfunded Defined Benefit Plans [Line Items]
Prior service credit	$ 36	$ 39
Net actuarial loss	(271)	(356)
Total	(235)	(317)
Non-US [Member]
Amounts Recognized In Accumulated Other Comprehensive Loss For All Major Funded And Unfunded Defined Benefit Plans [Line Items]
Prior service credit	3	4
Net actuarial loss	(110)	(76)
Total	$ (107)	$ (72)