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Segment and Geographic Information - Reconciliation of Assets and Depreciation Expense from Segments to Consolidated (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 24, 2020
Apr. 26, 2019
Apr. 27, 2018
Segment Reporting Information [Line Items]      
Total Assets $ 90,689 $ 89,694  
Depreciation Expense 907 895 $ 821
Reportable segments      
Segment Reporting Information [Line Items]      
Total Assets 74,525 76,559  
Depreciation Expense 675 651 575
Reportable segments | Cardiac and Vascular Group      
Segment Reporting Information [Line Items]      
Total Assets 14,844 15,453  
Depreciation Expense 210 194 183
Reportable segments | Minimally Invasive Therapies Group      
Segment Reporting Information [Line Items]      
Total Assets 39,666 41,186  
Depreciation Expense 194 206 217
Reportable segments | Restorative Therapies Group      
Segment Reporting Information [Line Items]      
Total Assets 16,850 16,825  
Depreciation Expense 233 217 146
Reportable segments | Diabetes Group      
Segment Reporting Information [Line Items]      
Total Assets 3,165 3,095  
Depreciation Expense 38 34 29
Corporate      
Segment Reporting Information [Line Items]      
Total Assets 16,164 13,135  
Depreciation Expense $ 232 $ 244 $ 246