Note 17 - Reportable Segments - Reconciliation of Reportable Segment Assets (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets		$ 28,500	$ 29,499	$ 30,154
Current assets (1)		7,212	7,453
Property, plant and equipment, net (3)	[1]	14,630	15,371
Other non-current assets (4)		2,220	2,179
Operating Segments [Member] | Reportable Segments [Member]
Assets		16,271	16,741	17,124
Operating Segments [Member] | Hemlock and Emerging Growth Businesses [Member]
Assets		2,307	2,136	2,024
Segment Reconciling Items [Member]
Current assets (1)	[2]	2,522	2,823	3,163
Investments (2)	[3]	119	99	54
Property, plant and equipment, net (3)	[4]	1,038	1,385	1,426
Other non-current assets (4)	[5]	$ 6,243	$ 6,315	$ 6,363

[1] Approximately $40 million, $48 million and $36 million of interest costs were capitalized as part of property, plant and equipment during the years ended December 31, 2023, 2022 and 2021, respectively.

[2] Includes cash, other receivables, prepaid expenses and current portion of long-term derivative assets.

[3] Represents other corporate investments.

[4] Represents corporate property not specifically identifiable to an operating segment.

[5] Includes goodwill, other intangible assets, pension assets, long-term derivative assets, operating leases and deferred income taxes.