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Goodwill and Other Intangible Assets (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
reportablesegments
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Goodwill [Line Items]                        
Goodwill       $ 5,898,000,000           $ 6,473,000,000 $ 5,898,000,000 $ 5,693,000,000
Finite-Lived Intangible Assets, Gross       9,800,000,000           10,997,000,000 9,800,000,000  
Finite-Lived Intangible Assets, Accumulated Amortization       (4,572,000,000)           (5,022,000,000) (4,572,000,000)  
Goodwill, Impaired, Accumulated Impairment Loss       (9,900,000,000)           (9,900,000,000) (9,900,000,000) (9,900,000,000)
Goodwill (Textuals) [Abstract]                        
Goodwill impairment charges             $ 423,000,000     0 0 423,000,000
Intangible Assets, Net (Excluding Goodwill)       5,606,000,000           6,194,000,000 5,606,000,000 5,950,000,000
Goodwill, Purchase Accounting Adjustments                   2,000,000 (8,000,000)  
Goodwill, Acquired During Period                   573,000,000 213,000,000  
Goodwill, Other Changes                     0  
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges $ 10,000,000 $ 9,000,000   18,000,000 $ 12,000,000         19,000,000 195,000,000 53,000,000
Asset Impairment Charges           $ 110,000,000 $ 55,000,000     19,000,000 195,000,000 476,000,000
Goodwill, Gross       15,798,000,000           16,373,000,000 15,798,000,000  
Indefinite-lived intangible assets, accumulated write-offs       (9,900,000,000)           (9,900,000,000) (9,900,000,000)  
Indefinite-lived intangible assets, including goodwill       16,176,000,000           16,592,000,000 16,176,000,000  
Future Amortization Expense, Year One                   536,000,000    
Future Amortization Expense, Year Two                   520,000,000    
Future Amortization Expense, Year Three                   517,000,000    
Future Amortization Expense, Year Four                   513,000,000    
Future Amortization Expense, Year Five                   $ 510,000,000    
Number of Reportable Segments | reportablesegments                   3    
In process research and development 16,000,000 83,000,000 $ 6,000,000     $ 178,000,000            
Core technology $ 8,000,000 $ 8,000,000 $ 64,000,000                  
Electrophysiology [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Hypothetical change in WACC                 0.50%      
Hypothetical change in revenue growth rates                 1.50%      
Global CRM Reporting Unit [Member]                        
Goodwill (Textuals) [Abstract]                        
Level Of Excess Fair Value Over Carrying Value For Reporting Unit   26.00%             26.00%      
Cardiovascular [Member]                        
Goodwill [Line Items]                        
Goodwill       3,426,000,000           $ 3,451,000,000 3,426,000,000 3,252,000,000
Goodwill, Impaired, Accumulated Impairment Loss       (1,479,000,000)           (1,479,000,000) (1,479,000,000) (1,479,000,000)
Goodwill (Textuals) [Abstract]                        
Goodwill impairment charges                   0 0  
Goodwill, Purchase Accounting Adjustments                   2,000,000 (2,000,000)  
Goodwill, Acquired During Period                   23,000,000 169,000,000  
Goodwill, Other Changes                     7,000,000  
Rhythm Management [Member]                        
Goodwill [Line Items]                        
Goodwill       290,000,000           292,000,000 290,000,000 294,000,000
Goodwill, Impaired, Accumulated Impairment Loss       (6,960,000,000)           (6,960,000,000) (6,960,000,000) (6,960,000,000)
Goodwill (Textuals) [Abstract]                        
Goodwill impairment charges                   0 0  
Goodwill, Purchase Accounting Adjustments                   2,000,000 (4,000,000)  
Goodwill, Acquired During Period                   0 0  
Goodwill, Other Changes                     0  
MedSurg [Member]                        
Goodwill [Line Items]                        
Goodwill       2,182,000,000           2,730,000,000 2,182,000,000 2,147,000,000
Goodwill, Impaired, Accumulated Impairment Loss       (1,461,000,000)           (1,461,000,000) (1,461,000,000) (1,461,000,000)
Goodwill (Textuals) [Abstract]                        
Goodwill impairment charges                   0 0  
Goodwill, Purchase Accounting Adjustments                   (2,000,000) (2,000,000)  
Goodwill, Acquired During Period                   550,000,000 44,000,000  
Goodwill, Other Changes                     (7,000,000)  
Global Electrophysiology (EP) Reporting Unit [Member]                        
Goodwill (Textuals) [Abstract]                        
Level Of Excess Fair Value Over Carrying Value For Reporting Unit   28.00%             28.00%      
Allocated Goodwill                 $ 292,000,000      
In Process Research and Development [Member]                        
Goodwill [Line Items]                        
Intangible assets reclassified from unamortizable to amortizable                   77,000,000    
Technology-related [Member]                        
Goodwill [Line Items]                        
Intangible assets reclassified from unamortizable to amortizable                   77,000,000    
Finite-Lived Intangible Assets, Gross       8,406,000,000           8,948,000,000 8,406,000,000  
Finite-Lived Intangible Assets, Accumulated Amortization       (3,697,000,000)           (4,054,000,000) (3,697,000,000)  
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges                   9,000,000 107,000,000 0
Patents [Member]                        
Goodwill [Line Items]                        
Finite-Lived Intangible Assets, Gross       519,000,000           520,000,000 519,000,000  
Finite-Lived Intangible Assets, Accumulated Amortization       (342,000,000)           (358,000,000) (342,000,000)  
Other Intangible Assets [Member]                        
Goodwill [Line Items]                        
Finite-Lived Intangible Assets, Gross       875,000,000           1,529,000,000 875,000,000  
Finite-Lived Intangible Assets, Accumulated Amortization       (533,000,000)           (610,000,000) (533,000,000)  
Purchased research and development [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges                   10,000,000 88,000,000 $ 53,000,000
Technology-related [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Indefinite-Lived Intangible Assets (Excluding Goodwill)       197,000,000           120,000,000 197,000,000  
Indefinite-lived intangible assets, accumulated write-offs       0           0 0  
Purchased research and development [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Indefinite-Lived Intangible Assets (Excluding Goodwill)       181,000,000           $ 99,000,000 181,000,000  
Sadra Medical Inc [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges               $ 51,000,000        
2011 Acquisitions, excluding Sadra [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges               $ 2,000,000        
In Process Research and Development 2 [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
In process research and development   $ 6,000,000                    
In Process Research and Development [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges         4,000,000              
Fair Value Inputs, Discount Rate     20.00%     16.50%            
IPR&D that was impaired [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure       $ 0             $ 0  
Core technology [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Other intangible asset charges         $ 8,000,000              
Fair Value Inputs, Discount Rate 10.00% 15.00% 15.00%                  
Minimum [Member] | In Process Research and Development [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Fair Value Inputs, Discount Rate   16.50%     16.50% 16.50%            
Maximum [Member] | In Process Research and Development [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Fair Value Inputs, Discount Rate   20.00%     20.00% 20.00%            
Vessix Charges [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Asset Impairment Charges           $ 67,000,000            
Other In-process Research and Development Project Charges [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Asset Impairment Charges           8,000,000            
Atritech Charges [Member]                        
Other Intangible Assets (Textuals) [Abstract]                        
Asset Impairment Charges           $ 35,000,000