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Note 17 - Income Taxes (Details Textual) - USD ($)
$ in Millions
 12 Months Ended 24 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Operating Loss Carryforwards $ 2,181   $ 2,181
Operating Loss Carryforwards, Not Subject to Expiration 1,007   1,007
Operating Loss Carryforwards, Not Subject to Expiration, Interest Carryforward 150   150
Operating Loss Carryforwards, Subject to Expiration $ 1,174   $ 1,174
Net Operating Losses and Tax Credit Carryforwards, Limitations Minimum Ownership Change Percentage 50.00%   50.00%
Net Operating Losses and Tax Credit Carryforwards, Limitations, Ownership Change Period (Year)     3 years
Deferred Tax Liabilities, Undistributed Foreign Earnings $ 16 $ 17 $ 16
Deferred Tax Assets, Valuation Allowance 778 826 778
Deferred Tax Assets, Net of Valuation Allowance 248 256 248
Income Tax Examination, Penalties and Interest Accrued 10 10 10
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 13 13 13
Foreign Tax Authority [Member]      
Operating Loss Carryforwards, Subject to Expiration 147   147
Operating Loss Carryforwards, Expired 77   77
Deferred Tax Assets, Valuation Allowance 290 285 290
Deferred Tax Assets, Net of Valuation Allowance $ 279 $ 275 279
Income Tax Examination, Year under Examination 2013 2014 2015 2016 2017 2015 2016 2017 2018  
Income Tax Examination, Penalties and Interest Expense $ 1 $ 2  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   (3)  
Open Tax Year 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023    
Domestic Tax Authority [Member]      
Deferred Tax Assets, Valuation Allowance $ 488 541 488
Deferred Tax Assets, Net of Valuation Allowance $ 472 $ 524 472
Open Tax Year 2019 2020 2021 2022 2023    
State and Local Jurisdiction [Member]      
Open Tax Year 2016 2017 2018 2019 2020 2021 2022 2023    
General Business Tax Credit Carryforward [Member]      
Tax Credit Carryforward, Amount $ 281   281
Investment Tax Credit Carryforward [Member]      
Tax Credit Carryforward, Amount $ 25   $ 25