Note 17 - Other Charges, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Other Income And Expenses [Abstract]
Change in fair value of embedded conversion features derivative	[1]	$ 382	$ 42
Loss on foreign exchange transactions		5	3
Other		(1)	1
Total		$ 386	$ 46

[1] Refer to Note 14, “Financial Instruments”.