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Goodwill and Other Intangible Assets, Net - Changes in the Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Jan. 29, 2016 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 40,530
Goodwill as a result of acquisitions	802
Purchase accounting adjustments, net	393
Currency adjustment, net	(1,349)
Ending balance	40,376
Cardiac and Vascular Group [Member]
Goodwill [Roll Forward]
Beginning balance	5,855
Goodwill as a result of acquisitions	409
Purchase accounting adjustments, net	13
Currency adjustment, net	(95)
Ending balance	6,182
Minimally Invasive Therapies Group [Member]
Goodwill [Roll Forward]
Beginning balance	23,399
Goodwill as a result of acquisitions	196
Purchase accounting adjustments, net	346
Currency adjustment, net	(1,120)
Ending balance	22,821
Restorative Therapies Group [Member]
Goodwill [Roll Forward]
Beginning balance	9,424
Goodwill as a result of acquisitions	197
Purchase accounting adjustments, net	34
Currency adjustment, net	(135)
Ending balance	9,520
Diabetes Group [Member]
Goodwill [Roll Forward]
Beginning balance	1,852
Goodwill as a result of acquisitions	0
Purchase accounting adjustments, net	0
Currency adjustment, net	1
Ending balance	$ 1,853

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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