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Note 3 - Revenue (Details Textual) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Contract with Customer, Liability, Customer Deposits $ 1,300     $ 1,300   $ 1,300
Increase (Decrease) in Contract with Customer, Liability 24 $ 59   155 $ 182  
Contract with Customer, Liability, Noncurrent 1,115     1,115   1,072
Contract with Customer, Liability, Current 166     166   223
Contract with Customer, Liability, Total 902     902   912
Contract With Customer Liability, Deferred Revenue, Noncurrent 732     732   764
Contract With Customer Liability, Deferred Revenue, Current $ 170     $ 170   $ 148
Maximum [Member]            
Long Term Supply, Commitment Period (Year)     10 years