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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
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.