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Divestiture (Details)
$ in Millions
12 Months Ended
Jul. 29, 2017
USD ($)
site
Apr. 24, 2020
USD ($)
Apr. 26, 2019
USD ($)
Apr. 27, 2018
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale of businesses   $ 0 $ 0 $ 6,058
Gain on sale of businesses   $ 0 $ 0 697
Patient Care, Deep Vein Thrombosis, and Nutritional Insufficiency Business        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale of businesses $ 6,100      
Gain on sale of businesses $ 697      
Sale of businesses, number of dedicated manufacturing sites | site 17      
Patient Care, Deep Vein Thrombosis, and Nutritional Insufficiency Business | Disposed of by sale, not discontinued operations        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Divestiture-related expenses       115
Accelerated stock compensation expense       $ 16