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Note 4 - Stock Options and Other Stock Plans - Stock-based Compensation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock options	$ 15	$ 15	$ 16
Retention awards	66	58	77
Total stock-based compensation, before tax	88	73	93
Excess tax benefits from equity compensation plans	26	55	52
Employee Stock [Member]
ESPP	$ 7	$ 0	$ 0

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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