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Note 4 - Redeemable, Convertible Preferred Stock (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Temporary Equity [Table Text Block]
  

September 30,

  

December 31,

 

(in millions)

 

2024

  

2023

 

Series B preferred stock

 $97  $96 

Series C preferred stock

  119   114 

Total

 $216  $210