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Note 5 - Goodwill and Other Intangible Assets - Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Category (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Intangible assets, accumulated amortization $ 105 $ 101
Intangible assets, gross carrying amount 125 125
Intangible assets, net 20 24
Trade Names [Member]    
Indefinite-lived intangible assets 17 17
Technology-Based Intangible Assets [Member]    
Finite-lived intangible assets, gross carrying amount 99 99
Intangible assets, accumulated amortization 96 92
Finite-lived intangible assets, net $ 3 $ 7
Intangible assets, weighted average remaining amortization period (Year) 1 year 2 years
Customer-Related and Other [Member]    
Finite-lived intangible assets, gross carrying amount $ 9  
Intangible assets, accumulated amortization 9  
Finite-lived intangible assets, net $ 0  
Customer-Related Intangible Assets [Member]    
Finite-lived intangible assets, gross carrying amount   $ 9
Intangible assets, accumulated amortization   9
Finite-lived intangible assets, net   $ 0