Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Apr. 24, 2020	Jan. 24, 2020	Oct. 25, 2019	Jul. 26, 2019	Apr. 26, 2019	Jan. 25, 2019	Oct. 26, 2018	Jul. 27, 2018	Apr. 24, 2020	Apr. 26, 2019	Apr. 27, 2018
Quarterly Financial Data [Abstract]
Net sales	$ 5,998	$ 7,717	$ 7,706	$ 7,493	$ 8,146	$ 7,546	$ 7,481	$ 7,384	$ 28,913	$ 30,557	$ 29,953
Gross profit	3,734	5,317	5,312	5,127	5,663	5,281	5,278	5,180
Net income	640	1,919	1,371	877	1,182	1,271	1,120	1,077	4,806	4,650	3,095
Net income attributable to Medtronic	$ 646	$ 1,915	$ 1,364	$ 864	$ 1,172	$ 1,269	$ 1,115	$ 1,075	$ 4,789	$ 4,631	$ 3,104
Basic earnings per share (in dollars per share)	$ 0.48	$ 1.43	$ 1.02	$ 0.64	$ 0.87	$ 0.95	$ 0.83	$ 0.79	$ 3.57	$ 3.44	$ 2.29
Diluted earnings per share (in dollars per share)	$ 0.48	$ 1.42	$ 1.01	$ 0.64	$ 0.87	$ 0.94	$ 0.82	$ 0.79	$ 3.54	$ 3.41	$ 2.27