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Reportable Segments (Reconciliation of Reportable Segment Net Income to Consolidated Net Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Gain (loss) on foreign currency hedges related to translated earnings                 $ 93 $ 121 $ 448
Research, development and engineering expenses                 (993) (864) (736)
Equity in earnings of affiliated companies $ 288 $ 32 $ 31 $ 39 $ 213 $ 31 $ 37 $ 80 390 361 284
Amortization of intangibles                 94 75 64
Interest expense, net                 (191) (155) (159)
Gain on realignment of equity investment                     2,676
Income tax (provision) benefit (54) (133) (126) (124) (1,978) [1] (89) [1] (153) [1] 66 [1] (437) (2,154) [1] 3
Net income (loss) $ 292 $ 625 $ 738 $ (589) $ (1,412) $ 390 $ 439 $ 86 1,066 (497) 3,695
Operating Segments [Member]                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Research, development and engineering expenses [2]                 (850) (760) (635)
Income tax (provision) benefit                 (477) (442) (421)
Net income (loss) [3]                 1,784 1,659 1,561
Operating Segments [Member] | Reportable Segments [Member]                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Net income (loss)                 2,065 1,918 1,781
Operating Segments [Member] | Non Reportable Segments [Member]                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Net income (loss)                 (281) (259) (220)
Segment Reconciling Items [Member]                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Impact of foreign currency movements not included in segment net income (loss)                 (157) (168) (85)
Gain (loss) on foreign currency hedges related to translated earnings                 (78) (121) (448)
Translation loss on Japanese yen-denominated debt                 (18) (14)  
Litigation, regulatory and other legal matters                 (124) 12 (153)
Research, development and engineering expenses [4]                 (134) (106) (107)
Equity in earnings of affiliated companies                 390 352 288
Amortization of intangibles                 (93) (75) (64)
Interest expense, net                 (149) (110) (127)
Pension mark to market                 (145) (22) (67)
Gain on realignment of equity investment                     2,676
Income tax (provision) benefit                 42 (1,709) 424
Other corporate items                 (252) (195) (203)
Net income (loss)                 $ 1,066 $ (497) $ 3,695
[1] In December 2017, the U.S. enacted the 2017 Tax Act which resulted in significant changes to our provision for income taxes during the fourth quarter of 2017. Refer to Note 4 (Income Taxes) to the Consolidated Financial Statements for additional information.
[2] Research, development and engineering expenses include direct project spending that is identifiable to a segment.
[3] Many of Corning's administrative and staff functions are performed on a centralized basis. Where practicable, Corning charges these expenses to segments based upon the extent to which each business uses a centralized function. Other staff functions, such as corporate finance, human resources and legal are allocated to segments, primarily as a percentage of sales.
[4] Primarily represents the equity earnings of HSG in 2018 and 2017, and Dow Corning in 2016.