Note 14 - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Balance as of January 1	$ 85	$ 92	$ 106
Tax positions related to the current year:
Additions		1	2
Tax positions related to prior years:
Additions	1		1
Reductions	(2)	(7)	(14)
Settlements with taxing jurisdictions			(1)
Lapses in statute of limitations		(1)	(2)
Balance as of December 31	$ 84	$ 85	$ 92