Note 6 - Redeemable, Convertible Preferred Stock (Tables)

6 Months Ended

Jun. 30, 2021

Temporary Equity Disclosure [Abstract]

Summary of Redeemable Convertible Preferred Stock

Redeemable convertible preferred stock was as follows at June 30, 2021 and December 31, 2020:

	June 30,		December 31,
(in millions)	2021		2020
Series A preferred stock	$	—	$	191
Series B preferred stock		94		—
Series C preferred stock		99		—
Total	$	193	$	191