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Acquisitions - Additional Information (Detail) - USD ($)
12 Months Ended
Mar. 17, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Acquisition [Line Items]      
Disposal Group, Including Discontinued Operation, Assets   $ 642,000,000 $ 0
Care Fusion Corporation      
Business Acquisition [Line Items]      
Percentage of interest acquired 100.00%    
Cash consideration per share (USD per share) $ 49.00    
Conversion factor 0.0777    
Acquisition-date fair value of consideration transferred net of in cash acquired $ 12,538,000,000    
Product recall accrual 36,000,000    
Portion of goodwill currently expected to be deductible for tax purposes $ 0    
Acquisition-related costs     59,000,000
Business combination, integration related costs   192,000,000 95,000,000
Business combination, pro forma information, revenue of acquiree since acquisition date,     2,000,000,000
Business combination, pro forma information, loss of acquiree since acquisition date     $ 242,000,000
Care Fusion Corporation | Customer relationships      
Business Acquisition [Line Items]      
Risk-adjusted discount rate 11.00%    
Weighted average useful life 15 years    
Care Fusion Corporation | Developed technology      
Business Acquisition [Line Items]      
Risk-adjusted discount rate 11.00%    
Weighted average useful life 12 years    
Care Fusion Corporation | Trademarks      
Business Acquisition [Line Items]      
Risk-adjusted discount rate 11.00%    
Weighted average useful life 22 years    
Care Fusion Corporation | In Process Research and Development      
Business Acquisition [Line Items]      
Risk-adjusted discount rate 12.00%    
Acquired in-process research and development $ 110,000,000    
Care Fusion Corporation | In Process Research and Development | Minimum      
Business Acquisition [Line Items]      
Technological and commercial risk 80.00%    
Care Fusion Corporation | In Process Research and Development | Maximum      
Business Acquisition [Line Items]      
Technological and commercial risk 85.00%    
Respiratory Solutions | Disposal Group, Held-for-sale, Not Discontinued Operations      
Business Acquisition [Line Items]      
Disposal Group, Including Discontinued Operation, Assets   578,000,000  
Respiratory Solutions | Disposal Group, Held-for-sale, Not Discontinued Operations | Developed technology      
Business Acquisition [Line Items]      
Disposal Group, Including Discontinued Operation, Assets   117,000,000  
Respiratory Solutions | Disposal Group, Held-for-sale, Not Discontinued Operations | In Process Research and Development      
Business Acquisition [Line Items]      
Disposal Group, Including Discontinued Operation, Assets   $ 80,000,000