Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 494	$ 1,371	$ 985	$ 2,248
Other comprehensive income (loss), net of tax:
Unrealized (loss) gain on investment securities	(12)	17	113	73
Translation adjustment	144	(214)	1,261	(148)
Net investment hedge	(164)	53	(1,276)	152
Net change in retirement obligations	17	12	20	25
Unrealized loss on cash flow hedges	(45)	5	(395)	(2)
Other comprehensive (loss) income	(60)	(127)	(277)	100
Comprehensive income including noncontrolling interests	434	1,244	708	2,348
Comprehensive income attributable to noncontrolling interests	(6)	(7)	(15)	(20)
Comprehensive income attributable to Medtronic	$ 428	$ 1,237	$ 693	$ 2,328