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Intangible Assets and Goodwill Gross Carrying Amount of Intangibles and Goodwill (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Gross Carrying Amount [Roll Forward]    
Balance at January 1 $ 3,731 $ 3,050
Acquisitions [1] 1,000 398
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) (20) 0
Foreign currency translation and other (140) 283
Balance at December 31 $ 4,571 $ 3,731
[1] Primarily attributable to the 2018 acquisitions of KUM and Winchester Interconnect, and the 2017 acquisitions of Movimento Group and nuTonomy, Inc., as further described in Note 20. Acquisitions and Divestitures.