Assets and Liabilities Held for Sale (Details) - USD ($)	3 Months Ended
	Jul. 28, 2017	Jul. 29, 2016	Apr. 28, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture-related items	$ 47,000,000	$ 0
Patient Care, Deep Vein Thrombosis, and Nutritional Insufficiency Business | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventories, net	369,000,000		$ 371,000,000
Property, plant, and equipment, net	710,000,000		689,000,000
Goodwill	2,971,000,000		2,910,000,000
Other intangible assets, net	2,319,000,000		2,320,000,000
Total assets held for sale	6,369,000,000		6,290,000,000
Other accrued expenses	59,000,000		34,000,000
Accrued compensation and retirement benefits	12,000,000		12,000,000
Deferred tax liabilities	880,000,000		707,000,000
Other liabilities	1,000,000		1,000,000
Total liabilities held for sale	952,000,000		$ 754,000,000
Divestiture-related items	47,000,000	$ 0
Legal and advisory services	22,000,000
Accelerated and incremental stock compensation expense	$ 16,000,000