Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 25, 2019	Oct. 26, 2018	Oct. 25, 2019	Oct. 26, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 1,371	$ 1,120	$ 2,248	$ 2,197
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on investment securities	17	(9)	73	(9)
Translation adjustment	(214)	(431)	(148)	(1,255)
Net investment hedge	53		152
Net investment hedge		0		0
Net change in retirement obligations	12	21	25	48
Unrealized gain (loss) on cash flow hedges	5		(2)
Unrealized gain (loss) on cash flow hedges		127		340
Other comprehensive (loss) income	(127)	(292)	100	(876)
Comprehensive income including noncontrolling interests	1,244	828	2,348	1,321
Comprehensive income attributable to noncontrolling interests	(7)	(2)	(20)	(4)
Comprehensive income attributable to Medtronic	$ 1,237	$ 826	$ 2,328	$ 1,317