v3.26.1
Investments - Master Trust Investments at Fair Value (Details) - EBP INVSAL - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value $ 5,599,098 $ 4,477,625
Net assets available for benefits 5,105,026 4,063,234
Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 5,599,098 4,477,625
Receivable from Securities Sold, Dividends, and Other 13,506 9,881
Accrued Investment Manager Fees (3) (50)
Net assets available for benefits 5,612,601 4,487,456
Plan’s Interest in Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 5,062,619 4,032,422
Receivable from Securities Sold, Dividends, and Other 12,111 8,552
Accrued Investment Manager Fees 0 (15)
Net assets available for benefits 5,074,730 4,040,959
Collective Trust Funds | Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 4,503,842 3,941,764
Collective Trust Funds | Plan’s Interest in Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 4,103,621 3,598,232
Short-Term Investment Funds | Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 607,596 224,827
Short-Term Investment Funds | Plan’s Interest in Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 574,376 190,789
Corning Common Stock | Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 487,273 310,647
Corning Common Stock | Plan’s Interest in Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 384,622 243,401
Preferred Stock | Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value 387 387
Preferred Stock | Plan’s Interest in Master Trust Balance    
EBP, Fully Benefit-Responsive Investment Contract [Line Items]    
Investments, at fair value $ 0 $ 0