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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
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Mar. 31, 2019 | Mar. 31, 2018
Reportable Segments [Abstract] |  |  |
Net sales of reportable segments and All Other |  | $ 2,850 | $ 2,513
Impact of foreign currency movements | [1] | (38) | (13)
Net sales |  | $ 2,812 | $ 2,500
[1] | This amount primarily represents the impact of foreign currency adjustments in the Display Technologies and Environmental Technologies segments.

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