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Goodwill and Other Intangible Assets , Changes in Goodwill (Details) - USD ($) | 12 Months Ended
--- | ---
Apr. 28, 2017 | Apr. 29, 2016 | Apr. 24, 2015
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | $ 41,500,000,000 | $ 40,530,000,000 |
Other adjustments, net |  | (31,000,000) |
Currency adjustment, net | (807,000,000) | (248,000,000) |
Goodwill reclassified to noncurrent assets held for sale | (2,910,000,000) |  |
Goodwill, ending balance | 38,515,000,000 | 41,500,000,000 | $ 40,530,000,000
Goodwill impairment | 0 | 0 | 0
Cardiac and Vascular Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 6,243,000,000 | 5,855,000,000 |
Other adjustments, net |  | 0 |
Currency adjustment, net | (49,000,000) | (26,000,000) |
Goodwill reclassified to noncurrent assets held for sale | 0 |  |
Goodwill, ending balance | 6,651,000,000 | 6,243,000,000 | 5,855,000,000
Minimally Invasive Therapies Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 23,784,000,000 | 23,399,000,000 |
Other adjustments, net |  | (34,000,000) |
Currency adjustment, net | (705,000,000) | (191,000,000) |
Goodwill reclassified to noncurrent assets held for sale | (2,910,000,000) |  |
Goodwill, ending balance | 20,411,000,000 | 23,784,000,000 | 23,399,000,000
Restorative Therapies Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 9,620,000,000 | 9,424,000,000 |
Other adjustments, net |  | 3,000,000 |
Currency adjustment, net | (53,000,000) | (32,000,000) |
Goodwill reclassified to noncurrent assets held for sale | 0 |  |
Goodwill, ending balance | 9,600,000,000 | 9,620,000,000 | 9,424,000,000
Diabetes Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 1,853,000,000 | 1,852,000,000 |
Other adjustments, net |  | 0 |
Currency adjustment, net | 0 | 1,000,000 |
Goodwill reclassified to noncurrent assets held for sale | 0 |  |
Goodwill, ending balance | 1,853,000,000 | 1,853,000,000 | $ 1,852,000,000
Other acquisitions |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions | 732,000,000 | 856,000,000 |
Other acquisitions | Cardiac and Vascular Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions | 457,000,000 | 393,000,000 |
Other acquisitions | Minimally Invasive Therapies Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions | 242,000,000 | 264,000,000 |
Other acquisitions | Restorative Therapies Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions | 33,000,000 | 199,000,000 |
Other acquisitions | Diabetes Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions | $ 0 | 0 |
Covidien plc |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions |  | 393,000,000 |
Covidien plc | Cardiac and Vascular Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions |  | 21,000,000 |
Covidien plc | Minimally Invasive Therapies Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions |  | 346,000,000 |
Covidien plc | Restorative Therapies Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions |  | 26,000,000 |
Covidien plc | Diabetes Group |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill as a result of acquisitions |  | $ 0 |

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