Note 13 - Restructuring Liabilities (Details Textual) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018 USD ($) Position	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2018 USD ($) Position
Restructuring Cost And Reserve [Line Items]
Restructuring Costs | $	$ 9	$ 2	$ 2	$ 13
Restructuring and Related Cost, Number of Positions Eliminated	100			175
Delayed severance payments | $				$ 2
United States and Canada [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	75			110
Rest Of The World [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	25			65
Manufacturing Service Positions [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	15			55
Administrative and Sales Positions [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	65			95
Research and Development Positions [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	20			25
Restructuring costs and other [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Costs | $	$ 9