Note 4 - Convertible Securities (Tables)

3 Months Ended

Mar. 31, 2022

Temporary Equity Disclosure [Abstract]

Summary of Redeemable Convertible Preferred Stock

Redeemable convertible preferred stock was as follows:

	March 31,		December 31,
(in millions)	2022		2021
Series B preferred stock	$	94	$	94
Series C preferred stock		104		102
Total	$	198	$	196