Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 24, 2020	Jan. 25, 2019	Jan. 24, 2020	Jan. 25, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 1,919	$ 1,271	$ 4,167	$ 3,468
Other comprehensive income (loss), net of tax:
Unrealized gain on investment securities	20	32	93	23
Translation adjustment	32	128	(116)	(1,127)
Net investment hedge	35		187
Net investment hedge		0		0
Net change in retirement obligations	13	17	38	65
Unrealized (loss) gain on cash flow hedges	(35)		(37)
Unrealized (loss) gain on cash flow hedges		(23)		317
Other comprehensive income (loss)	65	154	165	(722)
Comprehensive income including noncontrolling interests	1,984	1,425	4,332	2,746
Comprehensive income attributable to noncontrolling interests	(4)	(2)	(24)	(6)
Comprehensive income attributable to Medtronic	$ 1,980	$ 1,423	$ 4,308	$ 2,740