Note 19 - Reportable Segments - Reconciliation of Reportable Segment Assets (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets		$ 29,499	$ 30,154	$ 30,775
Current assets (1)		7,453	7,659
Property, plant and equipment, net (3)	[1]	15,371	15,804
Other non-current assets (4)		2,179	2,056
Operating Segments [Member] | Reportable Segments [Member]
Assets		16,741	17,124	16,950
Operating Segments [Member] | Hemlock and Emerging Growth Businesses [Member]
Assets		2,136	2,024	2,157
Segment Reconciling Items [Member]
Current assets (1)	[2]	2,823	3,163	3,434
Investments (2)	[3]	99	54	177
Property, plant and equipment, net (3)	[4]	1,385	1,426	1,463
Other non-current assets (4)	[5]	$ 6,315	$ 6,363	$ 6,594

[1] Approximately $48 million $36 million and $58 million of interest costs were capitalized as part of property, plant and equipment during the years ended December 31, 2022, 2021 and 2020, respectively.

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

[3] Represents other corporate investments. Asset balance does not include equity method affiliate liability balance of $270 million for HSG in 2019. HSG became a fully consolidated subsidiary of Corning on September 9, 2020.

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

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