Note 15 - Other Charges, Net (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income And Expenses [Abstract]
Change in fair value of embedded conversion features derivative liability	[1]	$ 431	$ 4	$ 382	$ 3
Loss on foreign exchange transactions		1	3	6	4
Other			(1)	(1)
Total		$ 432	$ 6	$ 387	$ 7

[1] Refer to Note 25, “Financial Instruments”.