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Note 2 - Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Restrictions on Cash and Cash Equivalents [Table Text Block]

Millions

 

2021

  

2020

  

2019

 

Cash and cash equivalents

 $960  $1,799  $831 

Restricted cash equivalents in other current assets

  19   7   13 

Restricted cash equivalents in other assets

  4   12   12 

Total cash, cash equivalents, and restricted cash equivalents shown on the Statement of Cash Flows:

 $983  $1,818  $856