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Note 2 - Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Restrictions on Cash and Cash Equivalents [Table Text Block]

Millions

 

2022

  

2021

  

2020

 

Cash and cash equivalents

 $973  $960  $1,799 

Restricted cash equivalents in other current assets

  10   19   7 

Restricted cash equivalents in other assets

  4   4   12 

Total cash, cash equivalents, and restricted cash equivalents

$987  $983  $1,818