v3.10.0.1
Identified Intangible Assets - Summary of Identified Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]      
Gross carrying amount $ 9,183 $ 9,335  
Accumulated amortization (4,716) (3,472) $ (2,169)
In-Process Research and Development [Member]      
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]      
Gross carrying amount [1] 276 687  
Accumulated amortization [1] 0 0  
Marketing-related [Member]      
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]      
Gross carrying amount 81 82  
Accumulated amortization (50) (34)  
Customer-related [Member]      
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]      
Gross carrying amount 964 1,155  
Accumulated amortization (301) (437)  
Technology-Based Intangible Assets [Member]      
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]      
Gross carrying amount 7,862 7,411  
Accumulated amortization $ (4,365) $ (3,001)  
[1] IPR&D is not subject to amortization until completion or abandonment of the associated research and development effort.