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Schedule II - Valuation and Qualifying Accounts (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Summary of Valuation Allowance [Table Text Block]
   

Beginning

           

Net Deductions

   

Ending

 

(in millions)

 

Balance

   

Additions

   

and Other

   

Balance

 

Year ended December 31, 2023

                               

Reserve for doubtful accounts

  $ 7       3       2     $ 8  

Deferred tax valuation allowance

  $ 826       62       110     $ 778  
                                 

Year ended December 31, 2022

                               

Reserve for doubtful accounts

  $ 7       2       2     $ 7  

Deferred tax valuation allowance

  $ 934       18       126     $ 826  
                                 

Year ended December 31, 2021

                               

Reserve for doubtful accounts

  $ 10             3     $ 7  

Deferred tax valuation allowance

  $ 1,112       33       211     $ 934