Note 17 - Changes in Benefit Obligations Recognized in Other Comprehensive Loss (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortization of:
Total loss (gain) recognized in Other comprehensive (loss) income	$ 140	$ 98	$ 202
Other Postretirement Benefit Plans [Member]
Changes In Benefit Obligations Recognized In Other Comprehensive Loss Income [Line Items]
Newly established loss (gain)	1	(8)
Amortization of:
Net actuarial gain	2
Total loss (gain) recognized in Other comprehensive (loss) income	$ 3	$ (8)