Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jul. 30, 2021	Apr. 29, 2022	Apr. 30, 2021	Apr. 24, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 28,308	$ 28,879
Accumulated Amortization		(13,006)	(11,533)
Impairment of finite-lived intangible assets				$ (37)
Impairment of indefinite-lived intangible assets				35
Neuroscience
Finite-Lived Intangible Assets [Line Items]
Impairment of finite-lived intangible assets			(30)	(33)
Impairment of indefinite-lived intangible assets		0	45	25
Cardiovascular
Finite-Lived Intangible Assets [Line Items]
Impairment of finite-lived intangible assets	$ (409)			(4)
Impairment of indefinite-lived intangible assets				$ 10
IPR&D
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		293	394
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		16,953	17,036
Accumulated Amortization		(7,005)	(6,058)
Purchased technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		10,802	11,286
Accumulated Amortization		(5,667)	(5,156)
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		473	475
Accumulated Amortization		(266)	(251)
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		80	82
Accumulated Amortization		$ (69)	$ (68)