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Note 20 - Reportable Segments (Details) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Note 20 - Reportable Segments (Details) [Line Items]
Restructuring Costs and Asset Impairment Charges (in Dollars)	$ 20	$ 34	$ 17		$ 71	$ 67
Operating Segments [Member] | Display Technologies [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Restructuring Costs and Asset Impairment Charges (in Dollars)						$ 28
Operating Segments [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Display Technologies [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales				3
Concentration Risk, Percentage				62.00%
Operating Segments [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Optical Communications [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales				2
Concentration Risk, Percentage				22.00%
Operating Segments [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Environmental Technologies [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales				3
Concentration Risk, Percentage				86.00%
Operating Segments [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Specialty Materials [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales				3
Concentration Risk, Percentage				56.00%
Operating Segments [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Life Sciences [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales				2
Concentration Risk, Percentage				46.00%
Minimum [Member]
Note 20 - Reportable Segments (Details) [Line Items]
Number of Material Formulations				150

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Represents the number of major customers who individually accounts for 10% or more of each segment's sales.

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The number of material formulations for glass, glass ceramics and fluoride crystals provided by the Specialty Materials Segment.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

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-Paragraph 21
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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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