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Reportable Segments (Reconciliation of Reportable Segment and All Other Net Sales to Consolidated Net Sales) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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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
Reportable Segments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Net sales of reportable segments and All Other |  |  |  |  |  |  |  |  |  | $ 11,398 | $ 10,258 | $ 9,440
Impact of foreign currency movements | [1] |  |  |  |  |  |  |  |  | (108) | (142) | (50)
Net sales |  | $ 3,035 | $ 3,008 | $ 2,747 | $ 2,500 | $ 2,637 | $ 2,607 | $ 2,497 | $ 2,375 | $ 11,290 | $ 10,116 | $ 9,390
[1] | This amount primarily represents the impact of foreign currency adjustments in the Display Technologies segment.

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