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Financing Arrangements - Narrative (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Nov. 12, 2020
May 12, 2020
USD ($)
Mar. 31, 2021
EUR (€)
Oct. 30, 2020
USD ($)
Oct. 30, 2020
EUR (€)
Sep. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Oct. 30, 2020
USD ($)
Jul. 26, 2019
USD ($)
Oct. 30, 2020
USD ($)
Oct. 25, 2019
USD ($)
Sep. 30, 2020
EUR (€)
tranche
May 12, 2020
JPY (¥)
Apr. 24, 2020
USD ($)
Jun. 30, 2019
EUR (€)
tranche
Senior Notes                              
Principal value       $ 27,000,000,000.0       $ 27,000,000,000.0   $ 27,000,000,000.0       $ 24,500,000,000  
Cash proceeds, net of discounts and issuance costs                   7,172,000,000 $ 5,568,000,000        
Loss on extinguishment of debt                   308,000,000 $ 406,000,000        
Financial Instruments Not Measured at Fair Value                              
Long-term debt, fair value       29,900,000,000       29,900,000,000   29,900,000,000       27,100,000,000  
Term Loan Agreements | Medtronic Luxco                              
Line of Credit Facility                              
Term of debt instrument   6 months                          
Senior Notes                              
Principal value   $ 2,800,000,000                     ¥ 300,000,000,000    
Term Loan Agreements                              
Additional extension option, term of extension   6 months                          
Term Loan Agreements | Medtronic Luxco | Subsequent Event                              
Term Loan Agreements                              
Additional extension option, term of extension 6 months                            
Term Loan Agreements | Medtronic Luxco | TIBOR Rate                              
Term Loan Agreements                              
Margin added to variable rate   0.50%                          
Commercial Paper Program | Commercial Paper                              
Commercial Paper                              
Commercial paper, maximum borrowing amount       3,500,000,000       3,500,000,000   3,500,000,000          
Commercial paper, amount outstanding       0       0   0       0  
Credit Facility | Line of Credit                              
Line of Credit Facility                              
Line of credit, maximum capacity       3,500,000,000       3,500,000,000   $ 3,500,000,000          
Term of debt instrument                   5 years          
Line of credit, amount outstanding       0       0   $ 0       $ 0  
Senior Notes 2019 | Senior notes | Medtronic Luxco                              
Senior Notes                              
Number of tranches | tranche                             6
Principal value | €                             € 5,000,000,000.0
Cash proceeds, net of discounts and issuance costs             $ 5,600,000,000                
Medtronic Inc, CIFSA, and Medtronic Luxco Senior Notes | Senior notes                              
Senior Notes                              
Extinguishment of debt             5,200,000,000                
Total consideration       6,300,000,000     $ 5,600,000,000                
Loss on extinguishment of debt               $ 308,000,000 $ 413,000,000            
Medtronic Inc and CIFSA Senior Notes | Senior notes                              
Senior Notes                              
Extinguishment of debt       $ 4,300,000,000                      
Medtronic Luxco Senior Notes | Senior notes                              
Senior Notes                              
Extinguishment of debt | €         € 1,500,000,000                    
Medtronic Luxco Senior Notes | Senior notes | Forecast                              
Senior Notes                              
Total consideration | €     € 750,000,000                        
Senior Notes 2020 | Senior notes | Medtronic Luxco                              
Senior Notes                              
Number of tranches | tranche                       6      
Principal value | €                       € 6,300,000,000      
Cash proceeds, net of discounts and issuance costs           $ 7,200,000,000