Note 2 - Restructuring, Impairment and Other Charges - Year-to-date Cost for Reportable Segments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Display Technologies [Member]
Restructuring, Settlement and Impairment Provisions			$ 4,000,000
Optical Communications [Member]
Restructuring, Settlement and Impairment Provisions			6,000,000
Environmental Technologies [Member]
Restructuring, Settlement and Impairment Provisions			5,000,000
Specialty Materials [Member]
Restructuring, Settlement and Impairment Provisions			12,000,000
Life Sciences [Member]
Restructuring, Settlement and Impairment Provisions			3,000,000
Other Segments [Member]
Restructuring, Settlement and Impairment Provisions			40,000,000
Corporate Segment [Member]
Restructuring, Settlement and Impairment Provisions			8,000,000
Restructuring, Settlement and Impairment Provisions	$ 0	$ 0	$ 78,000,000	$ 0