Note 17 - Amounts Recognized in the Consolidated Statement of Financial Position (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]
Pension and other postretirement liabilities	$ (600)	$ (619)
Other Postretirement Benefit Plans [Member]
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]
Other current liabilities	(5)	(5)
Pension and other postretirement liabilities	(69)	(73)
Other benefit plan liabilities	$ (74)	$ (78)