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Note 20 - Retirement Plans - (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Retirement Plans [Line Items]        
Earnings (loss) from discontinued operations       $ 1
Defined Benefit Plan, Special Termination Benefits     $ 3 $ 5
U.S. [Member]        
Retirement Plans [Line Items]        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets     6.00%  
U.S. [Member] | Equity Securities Exposure Obtained Through Derivatives [Member]        
Retirement Plans [Line Items]        
Percentage of securities exposure obtained through derivatives     4.00% 5.00%
U.S. [Member] | Government Bond Exposure Obtained Through Derivatives [Member]        
Retirement Plans [Line Items]        
Percentage of securities exposure obtained through derivatives     30.00% 30.00%
Duration of securities exposure obtained through derivatives     12 years 12 years
Non-US [Member]        
Retirement Plans [Line Items]        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets     3.30%  
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     2 years 5 years
Scenario, Forecast [Member]        
Retirement Plans [Line Items]        
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (in Dollars)   $ 7    
Net actuarial loss   $ 21    
Subsequent Event [Member]        
Retirement Plans [Line Items]        
Defined Benefit Plan Contributions By Employer Minimum Percentage Of Employee Salary 9.00%      
Defined Benefit Plan Contributions By Employer Maximum Percentage Of Employee Salary 10.00%      
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%  
Defined Benefit Plans [Member] | U.S. [Member]        
Retirement Plans [Line Items]        
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (in Dollars)     $ 7 $ 7
Net actuarial loss       5
Curtailment gains     2  
Defined Benefit Plan, Special Termination Benefits     $ 3 $ 5
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets     6.50% 6.40%
Defined Benefit Plans [Member] | Non-US [Member]        
Retirement Plans [Line Items]        
Net actuarial loss     $ 5 $ 5
Curtailment gains     $ 5  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets     3.46% 3.98%