Note 6 - Other Income (Details Textual) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Profit (Loss) from Real Estate Operations	[1]	$ 65	$ 176
Real Estate Transaction [Member]
Profit (Loss) from Real Estate Operations			$ 107

[1] 2023 includes a one-time $107 million transaction.