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Earnings (Loss) Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Class of Stock [Line Items]        
Net income (loss) attributable to Corning Incorporated $ 430 $ (117) $ 1,056 $ 196
Weighted-average common shares outstanding - basic (in shares) 856 854 855 853
Stock options and other awards (in shares) 12 15 15
Weighted-average common shares outstanding - diluted (in shares) 868 854 870 868
Basic earnings (loss) per common share (in dollars per share) $ 0.50 $ (0.14) $ 1.24 $ 0.23
Diluted earnings (loss) per common share (in dollars per share) $ 0.50 $ (0.14) $ 1.21 $ 0.23
Stock options and other awards        
Class of Stock [Line Items]        
Anti-dilutive potential shares excluded from diluted earnings per common share (in shares) 1 18 1