Note 17 - Changes in the Company's Benefit Obligation and Funded Status (Details) - Other Postretirement Benefit Plans [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in the Company's Benefit Obligation and Funded Status [Line Items]
Projected benefit obligation at beginning of period	$ 78	$ 86
Interest cost	2	3	$ 4
Plan participants’ contributions	5	7
Actuarial loss (gain)	1	(8)
Benefit payments	(10)	(12)
Currency adjustments	(2)	2
Projected benefit obligation at end of period	74	78	$ 86
Underfunded status at end of period	$ (74)	$ (78)