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Revenue (Disaggregation of Revenue) (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
Revenues by Products Categories | $ 3,035 | $ 3,008 | $ 2,747 | $ 2,500 | $ 2,637 | $ 2,607 | $ 2,497 | $ 2,375 | $ 11,290 | $ 10,116 | $ 9,390
Display Products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues by Products Categories |  |  |  |  |  |  |  |  | 3,168 | 2,997 | 3,238
Telecommunication Products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues by Products Categories |  |  |  |  |  |  |  |  | 4,192 | 3,545 | 3,005
Specialty Glass Products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues by Products Categories |  |  |  |  |  |  |  |  | 1,479 | 1,403 | 1,124
Environmental Substrate and Filter Products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues by Products Categories |  |  |  |  |  |  |  |  | 1,289 | 1,106 | 1,032
Life Science Products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues by Products Categories |  |  |  |  |  |  |  |  | 946 | 879 | 839
All Other Products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues by Products Categories |  |  |  |  |  |  |  |  | $ 216 | $ 186 | $ 152

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