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Quarterly Operating Results (Details) - USD ($)
$ / shares in Units, $ 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
Quarterly Operating Results [Abstract]                      
Net sales $ 3,035 $ 3,008 $ 2,747 $ 2,500 $ 2,637 $ 2,607 $ 2,497 $ 2,375 $ 11,290 $ 10,116 $ 9,390
Gross margin 1,202 1,232 1,072 955 1,032 1,050 987 951 4,461 4,020 3,763
Equity in earnings of affiliated companies 288 32 31 39 213 31 37 80 390 361 284
Provision for income taxes (54) (133) (126) (124) (1,978) [1] (89) [1] (153) [1] 66 [1] (437) (2,154) [1] 3
Net income (loss) attributable to Corning Incorporated $ 292 $ 625 $ 738 $ (589) $ (1,412) $ 390 $ 439 $ 86 $ 1,066 $ (497) $ 3,695
Basic earnings (loss) per common share (in dollars per share) $ 0.27 $ 0.75 $ 0.87 $ (0.72) $ (1.66) $ 0.41 $ 0.46 $ 0.07 $ 1.19 $ (0.66) $ 3.53
Diluted earnings (loss) per common share (in dollars per share) $ 0.26 $ 0.67 $ 0.78 $ (0.72) $ (1.66) $ 0.39 $ 0.42 $ 0.07 $ 1.13 $ (0.66) $ 3.23
[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.