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Note 10 - Accounts Receivable (Details Textual) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss, Current $ 11   $ 11   $ 10
Total Transfer Capacity, Undivided Interests to Investors under Receivables Securitization Facility 800   $ 800    
Receivables Securitization Facility, Duration (Year)     3 years    
Receivables Securitization Facility, Maturity Date     Jul. 31, 2025    
Value Outstanding, Undivided Interest Held by Investors Under Receivables Securitization Facility 200   $ 200   300
Accounts Receivable, Supporting Undivided Investor Held Interest 1,700   1,700   1,300
Interest Expense, Total 315 $ 290 $ 938 $ 862  
Asset-Backed Securities, Securitized Loans and Receivables [Member]          
Accounts Receivable, from Securitization, Default or Dilution Ratio     1.00%    
Interest Expense, Total 4 $ 1 $ 8 $ 3  
Maximum [Member]          
Total Transfer Capacity, Undivided Interests to Investors under Receivables Securitization Facility 800   800    
Other Assets [Member]          
Accounts Receivable, Allowance for Credit Loss, Noncurrent $ 51   $ 51   $ 51