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Revenue - Disaggregation of Net Sales by Segment and Division (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 30, 2020 | Oct. 25, 2019 | Oct. 30, 2020 | Oct. 25, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 7,647 | $ 7,706 | $ 14,154 | $ 15,199
Cardiac & Vascular Group |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 2,725 | 2,855 | 5,158 | 5,645
Cardiac & Vascular Group | Cardiac Rhythm & Heart Failure |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 1,426 | 1,426 | 2,673 | 2,807
Cardiac & Vascular Group | Coronary & Structural Heart |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 831 | 955 | 1,611 | 1,896
Cardiac & Vascular Group | Aortic, Peripheral, & Venous |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 468 | 474 | 873 | 942
Minimally Invasive Therapies Group |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 2,285 | 2,142 | 4,086 | 4,242
Minimally Invasive Therapies Group | Surgical Innovations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 1,393 | 1,454 | 2,473 | 2,871
Minimally Invasive Therapies Group | Respiratory, Gastrointestinal, & Renal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 893 | 688 | 1,613 | 1,371
Restorative Therapies Group |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 2,063 | 2,112 | 3,774 | 4,124
Restorative Therapies Group | Cranial & Spinal Technologies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 1,071 | 1,117 | 2,015 | 2,167
Restorative Therapies Group | Specialty Therapies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 581 | 575 | 1,035 | 1,138
Restorative Therapies Group | Neuromodulation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 411 | 420 | 725 | 818
Diabetes Group |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 574 | $ 596 | $ 1,136 | $ 1,188

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