v3.10.0.1
Acquisitions, Divestitures, Assets and Liabilities Held for Sale, Licensing Arrangements, Research and Development and Collaborative Arrangements, Equity-Method Investments and Privately Held Investment - Medivation, Inc. (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended 15 Months Ended
Sep. 28, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Business Acquisition [Line Items]          
Cash payments for acquisition, net of cash acquired [1]   $ 0 $ 1,000 $ 18,368  
Goodwill   53,411 [2] 55,952 [2] 54,449 $ 55,952 [2]
Medivation [Member]          
Business Acquisition [Line Items]          
Business acquisition, per share in cash (in dollars per share) $ 81.5        
Payments to acquire businesses, cash portion $ 14,300        
Cash payments for acquisition, net of cash acquired 13,900        
Acquisition consideration, amount payable       $ 365  
Intangible assets 12,200        
Goodwill 6,100        
Net deferred tax liabilities 4,000        
Assumed contingent consideration 259        
Contingent consideration paid   $ 35      
Reduction in identifiable intangible assets         $ 1,000
Decrease in amortization of intangible assets     $ 38    
Developed Technology Rights [Member] | Medivation [Member]          
Business Acquisition [Line Items]          
Intangible assets $ 8,100        
Acquired intangible assets, useful life 12 years        
In Process Research and Development [Member] | Medivation [Member]          
Business Acquisition [Line Items]          
Intangible assets $ 4,100        
[1] Amounts may not add due to rounding.
[2] Amounts may not add due to rounding.