Note 9 - Stock Compensation - Granted Awards Activity (Details) shares in Millions	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Restricted Stock Units (RSUs) [Member]
Granted (in shares) | shares	1.2
Grant Date Fair Value (in dollars per share) | $ / shares	$ 15.50	[1]
Performance Share Units [Member]
Granted (in shares) | shares	0.5
Grant Date Fair Value (in dollars per share) | $ / shares	$ 14.42	[1]

[1] Weighted-average per share