Note 1 - Basis of Presentation - Proceeds Received for Project (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Proceeds from asset sold	$ 7	$ 8
Sale Agreement with the Doraville Community Improvement District [Member]
Proceeds from asset sold	5	6
Proceeds received in advance of asset sale	0	9
Total proceeds received for asset transfer to CID	5	15
Proceeds for reimbursement of development costs	0	11
Total proceeds received from CID	$ 5	$ 26

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration