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Divestiture (Details)
12 Months Ended
Jul. 29, 2017
USD ($)
site
Apr. 26, 2019
USD ($)
Apr. 27, 2018
USD ($)
Apr. 28, 2017
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale of businesses   $ 0 $ 6,058,000,000 $ 0
Gain on sale of businesses   0 697,000,000 0
Divestiture-related expenses       $ 0
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 $ 6,100,000,000      
Gain on sale of businesses $ 697,000,000      
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   $ 0 115,000,000  
Accelerated stock compensation expense     $ 16,000,000