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Note 12 - Other Income, Net (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Other Income And Expenses [Abstract]    
Change in fair value of embedded conversion features derivative liability [1] $ 1 $ (53)
Loss on foreign exchange transactions   2
Other $ (1) (2)
Total   $ (53)
[1] Refer to Note 20, “Financial Instruments”.