Note 16 - Share-based Compensation (Details Textual) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement, Expense, Tax Benefit	$ 17	$ 16	$ 37
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	23,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	0
Proceeds from Stock Options Exercised	$ 42	$ 40	$ 97
Restricted Stock and Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	118	93	88
Performance-based Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	120	5	3
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense, Tax Benefit	4
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value	6	20	16
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 29	$ 36	$ 100

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Gross number of share options (or share units) granted during the period.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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