Note 4 - Restructuring of Operations (Details Textual) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Restructuring Charges, Total	$ 16	$ 9	$ 19	$ 18
Restructuring and Related Cost, Expected Number of Positions Eliminated			400

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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