Goodwill and Other Intangible Assets , Intangible Assets (Details) - USD ($)	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 29,172,000,000	$ 30,919,000,000
Accumulated Amortization	(6,359,000,000)	(4,741,000,000)
Impairment of finite-lived intangible assets	0	0	$ 0
Impairment of indefinite-lived intangible assets	0	0
IPR&D
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	594,000,000	721,000,000
Impairment of indefinite-lived intangible assets			$ 5,000,000
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,862,000,000	18,596,000,000
Accumulated Amortization	(2,166,000,000)	(1,331,000,000)
Purchased technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,461,000,000	11,397,000,000
Accumulated Amortization	(3,690,000,000)	(2,976,000,000)
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	772,000,000	854,000,000
Accumulated Amortization	(461,000,000)	(403,000,000)
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	77,000,000	72,000,000
Accumulated Amortization	$ (42,000,000)	$ (31,000,000)