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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

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