Note 17 - Other Charges, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Other Income And Expenses [Abstract]
Change in fair value of embedded conversion features derivative	[1]	$ 42
Loss on foreign exchange transactions		3	$ 16
Other		1	1
Total		$ 46	$ 17

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