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Acquisitions and Acquisition-Related Items - Narrative (Details) - USD ($) $ in Millions		3 Months Ended
	Aug. 23, 2016	Jul. 28, 2017	Jul. 29, 2016	Apr. 28, 2017	Aug. 31, 2016	Apr. 29, 2016
Business Acquisition [Line Items]
Goodwill		$ 39,196		$ 38,515
Cost of products sold		2,349	$ 2,261
Acquisition-related items		44	52
Fair value of contingent consideration		242	379	246		$ 377
Other liabilities
Business Acquisition [Line Items]
Fair value of contingent consideration		173		180
Other accrued expenses
Business Acquisition [Line Items]
Fair value of contingent consideration		69		$ 66
Heartware International, Inc.
Business Acquisition [Line Items]
Acquisition consideration	$ 1,100
Other intangible assets	625
Goodwill	481
Long-term debt	245
Debt redeemed					$ 203
Heartware International, Inc. | Bank borrowings | Debt due December 2017
Business Acquisition [Line Items]
Long-term debt		42
Heartware International, Inc. | Customer-related and technology-related
Business Acquisition [Line Items]
Other intangible assets	$ 602
Estimated useful lives	15 years
Heartware International, Inc. | Tradenames
Business Acquisition [Line Items]
Other intangible assets	$ 23
Estimated useful lives	5 years
Business acquisitions
Business Acquisition [Line Items]
Acquisition-related items and other		53
Cost of products sold		9
Acquisition-related items		$ 46	52
Integration costs			44
Accelerated and incremental stock compensation expense			$ 8

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