Note 8 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill, Gross	$ 8,900	$ 8,900
Goodwill, Impaired, Accumulated Impairment Loss	6,500	6,500
Amortization of Intangible Assets	122	$ 123	$ 129
Finite-Lived Intangible Asset, Expected Amortization, Year One	126
Finite-Lived Intangible Asset, Expected Amortization, Year Two	119
Finite-Lived Intangible Asset, Expected Amortization, Year Three	98
Finite-Lived Intangible Asset, Expected Amortization, Year Four	94
Finite-Lived Intangible Asset, Expected Amortization, Year Five	$ 88

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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