Note 17 - Changes in Major Plan Assets and Benefit Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes In Plan Assets And Benefit Recognized In Other Comprehensive Income Loss [Line Items]
Newly established (loss) gain		$ 35	$ (148)	$ (88)
Amortization of:
Prior service credit	[1]	(8)	(7)	(8)
U.S. [Member]
Changes In Plan Assets And Benefit Recognized In Other Comprehensive Income Loss [Line Items]
Newly established (loss) gain		90	(83)	(126)
Amortization of:
Prior service credit		(7)	(7)	(8)
Net actuarial loss			7
Total (loss) income recognized in Other comprehensive income		83	(83)	(134)
Non-US [Member]
Changes In Plan Assets And Benefit Recognized In Other Comprehensive Income Loss [Line Items]
Newly established (loss) gain		(37)	(70)	25
Amortization of:
Net actuarial loss		3		2
Total (loss) income recognized in Other comprehensive income		$ (34)	$ (70)	$ 27

[1] Reclassified to Pension (income) expense - refer to Note 17, "Retirement Plans" and Note 18, "Other Postretirement Benefits" for additional information.