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Note 9 - Stock Compensation (Details Textual) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Apr. 21, 2021
Proceeds from Stock Options Exercised			$ 5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)			0.3
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid			$ 2
Share-based Payment Arrangement, Expense	$ 6	$ 2	15	$ 5
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 29		$ 29
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 8 months 12 days
Omnibus Incentive Plan 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					3.5
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	6.0		6.0
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Year)			3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			0.18%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			2.27%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			62.80%
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)			0.1
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)			0.5