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Goodwill and Acquisition-Related Intangibles - Components of Acquisition Related Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition-related intangibles, gross carrying amount $ 2,935 $ 2,935
Acquisition-related intangibles, accumulated amortization 2,386 2,307
Acquisition-related intangibles, net 549 628
Developed technology    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition-related intangibles, gross carrying amount 2,125 2,125
Acquisition-related intangibles, accumulated amortization 1,627 1,573
Acquisition-related intangibles, net $ 498 552
Developed technology | Minimum    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition-related intangibles, amortization period 7 years  
Developed technology | Maximum    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition-related intangibles, amortization period 10 years  
Customer relationships    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition-related intangibles, amortization period 8 years  
Acquisition-related intangibles, gross carrying amount $ 810 810
Acquisition-related intangibles, accumulated amortization 759 734
Acquisition-related intangibles, net $ 51 $ 76