Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Jun. 30, 2022	Mar. 31, 2022
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 10	$ 0.10
Treasury Stock, Value, Acquired, Cost Method		$ 25
Treasury Stock, Shares, Acquired (in shares)		1,483,742
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 102

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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