Note 19 - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Currency translation adjustments	$ (104)	$ (85)
Pension and other postretirement benefit plan changes	(303)	(306)
Ending balance	$ (407)	$ (391)

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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