Note 20 - Reportable Segments - Reconciliation of Reportable Segment Assets (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets		$ 30,154	$ 30,775	$ 28,898
Current assets (1)		7,659	8,004
Other investments		64	177
Property, plant and equipment, net (3)		15,804	15,742
Other non-current assets (4)		2,056	2,140
Operating Segments [Member] | Reportable Segments [Member]
Assets		16,930	16,865	16,998
Operating Segments [Member] | Nonreportable Segments [Member]
Assets		2,024	2,157	1,028
Segment Reconciling Items [Member]
Current assets (1)	[1]	3,163	3,434	3,301
Other investments	[2]	54	177	43
Property, plant and equipment, net (3)	[3]	1,620	1,548	1,764
Other non-current assets (4)	[4]	$ 6,363	$ 6,594	$ 5,764

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

[2] 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.

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

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