Note 5 - Other Income (Details Textual) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Profit (Loss) from Real Estate Operations	[1],[2]	$ 176	$ 60
Real Estate Transaction [Member]
Profit (Loss) from Real Estate Operations		$ 107

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

[2] Prior periods have been reclassified to conform to the current period disclosure.