Note 15 - Fair Value Measurements (Details) (Samsung Corning Precision Materials Co., Ltd. [Member], USD $) In Millions, unless otherwise specified	Jan. 15, 2014
Note 15 - Fair Value Measurements (Details) [Line Items]
Business Combination, Contingent Consideration, Liability	$ 196
Revenues Generated by Samsung Corning Precision Materials [Member]
Note 15 - Fair Value Measurements (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	665
Volume of Certain Sales [Member]
Note 15 - Fair Value Measurements (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 100