Note 15 - Shareholders' Equity (Details Textual) - USD ($)			3 Months Ended		6 Months Ended
	Jan. 22, 2016	Jan. 15, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Oct. 28, 2015	Oct. 26, 2015	Jul. 15, 2015
Convertible Preferred Stock, Series A [Member] | Samsung Corning Precision Materials Co., Ltd. [Member]
Stock Issued During Period, Shares, Acquisitions		2,300
Share Price		$ 1,000,000
Stock Issued During Period, Value, Acquisitions		$ 2,300,000,000
Convertible Preferred Stock, Series A [Member]
Preferred Stock, Par or Stated Value Per Share		$ 100
Common Stock [Member]
Convertible Preferred Stock, Shares Issued upon Conversion		50,000
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Other Comprehensive Income (Loss), Equity Method Investments, Tax			$ 19,000,000	$ 0	$ 19,000,000	$ 0
July 15, 2015 [Member]
Stock Repurchase Program, Authorized Amount										$ 2,000,000,000
Oct. 26, 2015 [Member]
Stock Repurchase Program, Authorized Amount									$ 4,000,000,000
Oct. 28, 2015 [Member] | Morgan Stanley [Member]
Stock Repurchase Program, Authorized Amount								$ 1,250,000,000
Treasury Stock, Shares, Acquired	15,900,000
The 2015 Repurchase Program [Member]
Treasury Stock, Shares, Acquired			40,900,000		80,700,000
Treasury Stock, Value, Acquired, Cost Method			$ 810,000,000		$ 1,561,000,000
Gain on Realignment of Equity Investment [Member]
Foreign Currency Transaction Gain, before Tax			45,000,000
Cumulative Unamortized Actuarial Loss Released During Period, Net of Tax			260,000,000
Cumulative Unamortized Actuarial Loss Released During Period, Tax			19,000,000
Selling, General and Administrative Expenses [Member]
Foreign Currency Transaction Loss, before Tax			22,000,000
Cumulative Unamortized Actuarial Loss Released During Period, Net of Tax			$ 2,000,000
Preferred Stock, Par or Stated Value Per Share			$ 100		$ 100		$ 100