Note 9 - Property, Plant and Equipment, Net of Accumulated Depreciation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Interest Costs Capitalized	$ 35	$ 40	$ 35
Precious Metals	3,000	3,100
Depletion	$ 19	$ 21	$ 20