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Reportable Segments (Reconciliation of Reportable Segment Net Income to Consolidated Net Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]        
Research, development, and engineering expense $ (430) $ (249) $ (691) $ (498)
Equity in earnings of affiliated companies 79 33 93 58
Amortization of intangibles (28) (28) (54) (57)
Interest expense, net (67) (54) (131) (106)
Income tax (provision) benefit (22) (124) (10) (200)
Cumulative adjustment related to customer contract     (105)  
Accelerated depreciation     (680) (658)
Severance charges (58) (7) (135) (7)
Net (loss) income attributable to Corning Incorporated (71) 92 (167) 591
Operating Segments [Member]        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Research, development, and engineering expense (181) (214) (390) (427)
Income tax (provision) benefit (77) (126) (139) (237)
Accelerated depreciation (293) (300) (589) (603)
Net (loss) income attributable to Corning Incorporated 288 475 524 888
Operating Segments [Member] | Reportable Segments [Member]        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net (loss) income attributable to Corning Incorporated 354 543 659 1,028
Operating Segments [Member] | Non Reportable Segments [Member]        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net (loss) income attributable to Corning Incorporated (66) (68) (135) (140)
Segment Reconciling Items [Member]        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Impact of foreign currency movements (6) (36) (25) (73)
Gain on foreign currency hedges related to translated earnings 35 (107) 93 77
Translation gain (loss) on Japanese yen-denominated debt 3 (36) (11) (21)
Research, development, and engineering expense (37) (35) (76) (71)
Equity in earnings of affiliated companies 81 34 99 60
Amortization of intangibles (28) (28) (54) (57)
Interest expense, net (64) (49) (122) (94)
Income tax (provision) benefit 55 2 129 37
Cumulative adjustment related to customer contract     (105)  
Accelerated depreciation (195)   (195)  
Severance charges (58) (7) (135) (7)
Capacity realignment and other charges and credits (84) (60) (232) (67)
Other corporate items (61) (61) (57) (81)
Net (loss) income attributable to Corning Incorporated $ (71) $ 92 $ (167) $ 591