Note 3 - HSG Transactions - Recognized Amounts of Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020	Sep. 09, 2020
Goodwill (3)		$ 2,429	$ 2,460
HSG [Member]
Inventory				$ 503
Property, plant and equipment				651
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total				285
Other current and non-current assets (1)	[1]			173
Short-term borrowings				(178)
Trade payables and other accrued liabilities				(329)
Other liabilities				(1,261)
Total identified net liabilities				(156)
Non-controlling interests (2)	[2]			(102)
Total fair value of Corning's previously held equity investment (2)	[2]			(250)
Goodwill (3)	[3]			$ 508

[1] The other current and non-current assets included a contingent consideration asset of $20 million at fair value for a cost adjustment contract related to the TCS Transaction. Refer to Note 13 (Fair Value Measurements) to the consolidated financial statements for additional information.

[2] The purchase price being used to measure the goodwill of the Redemption is $352 million, including the fair value of Corning’s previously held equity interest and non-controlling interest, in the amount of $250 million and $102 million, respectively.

[3] The goodwill recognized is not deductible for U.S. income tax purposes. The goodwill was allocated to "All Other" within segment reporting as disclosed in Note 16 (Reportable Segments) to the consolidated financial statements for more information.