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 - Bamboo Therapeutics, Inc. (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Aug. 01, 2016
Oct. 02, 2016
Apr. 03, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
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
Bamboo Therapeutics [Member]            
Business Acquisition [Line Items]            
Total consideration transferred $ 150          
Potential milestone payments 495          
Consideration transferred, including equity interest held prior to business combination 343          
Payments to acquire businesses, cash portion 130   $ 43      
Cash payments for acquisition, net of cash acquired 101          
Assumed contingent consideration 167          
Fair value of previously held equity interest in acquiree 45          
Goodwill 142          
Net deferred tax liabilities 94          
Bamboo Therapeutics [Member] | Other Nonoperating Income (Expense) [Member]            
Business Acquisition [Line Items]            
Gain recognized   $ 2        
In Process Research and Development [Member] | Bamboo Therapeutics [Member]            
Business Acquisition [Line Items]            
Intangible assets $ 330          
[1] Amounts may not add due to rounding.
[2] Amounts may not add due to rounding.