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Note 19 - Retirement Plans - (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Retirement Plans [Line Items]      
Income (loss) from discontinued operations   $ 1 $ 1
Defined Benefit Plan, Special Termination Benefits   5 $ 13
U.S. [Member]      
Retirement Plans [Line Items]      
Net actuarial loss   $ 5  
U.S. [Member] | Equity Securities Exposure Obtained Through Derivatives [Member]      
Retirement Plans [Line Items]      
Percentage of securities exposure obtained through derivatives   5.00% 2.00%
U.S. [Member] | Government Bond Exposure Obtained Through Derivatives [Member]      
Retirement Plans [Line Items]      
Percentage of securities exposure obtained through derivatives   30.00% 31.00%
Duration of securities exposure obtained through derivatives   12 years 13 years
Non-US [Member]      
Retirement Plans [Line Items]      
Net actuarial loss   $ 5 $ 3
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets   3.86%  
Non-US [Member] | Equity Securities Exposure Obtained Through Derivatives [Member]      
Retirement Plans [Line Items]      
Percentage of securities exposure obtained through derivatives   0.00% 0.00%
Non-US [Member] | Government Bond Exposure Obtained Through Derivatives [Member]      
Retirement Plans [Line Items]      
Percentage of securities exposure obtained through derivatives   7.00% 7.00%
Duration of securities exposure obtained through derivatives   5 years 7 years
Scenario, Forecast [Member]      
Retirement Plans [Line Items]      
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (in Dollars) $ (7)    
Net actuarial loss $ (5)    
Scenario, Forecast [Member] | U.S. [Member]      
Retirement Plans [Line Items]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets 6.50%    
Cash Balance Plan [Member]      
Retirement Plans [Line Items]      
Defined Benefit Plan Contributions By Employer Minimum Percentage Of Employee Salary   7.00%  
Defined Benefit Plan Contributions By Employer Maximum Percentage Of Employee Salary   8.00%