Note 13 - Marketable Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2021
Certificates of Deposit [Member]
Debt Securities, Cost	$ 21	$ 17
Debt Securities, Fair Value	21	$ 17
Common Stock [Member]
Equity Securities, Cost	16
Equity Securities, Unrealized Gain	33
Available-for-sale securities	$ 49

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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