Note 5 - Other Income - Schedule of Other Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Real estate income [a] [b]	[1],[2]	$ 176	$ 60
Environmental remediation and restoration		(19)	(26)
Net periodic pension benefit/(costs)		14	20
Other [a]	[2]	13	(7)
Total		$ 184	$ 47

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

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