Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jan. 25, 2019	Jan. 26, 2018	Jan. 25, 2019	Jan. 26, 2018
Income Statement [Abstract]
Net sales	$ 7,546	$ 7,369	$ 22,411	$ 21,809
Costs and expenses:
Cost of products sold	2,265	2,194	6,672	6,669
Research and development expense	561	559	1,736	1,664
Selling, general, and administrative expense	2,596	2,523	7,798	7,642
Amortization of intangible assets	436	461	1,327	1,375
Restructuring charges, net	26	7	112	23
Certain litigation charges	63	61	166	61
Gain on sale of businesses	0	0	0	(697)
Other operating expense, net	57	128	278	360
Operating profit (loss)	1,542	1,436	4,322	4,712
Other non-operating (income) expense, net	(71)	139	(309)	(67)
Interest expense	243	270	726	829
Income before income taxes	1,370	1,027	3,905	3,950
Income tax provision	99	2,419	437	2,320
Net income (loss)	1,271	(1,392)	3,468	1,630
Net (income) loss attributable to noncontrolling interests	(2)	3	(9)	14
Net income (loss) attributable to Medtronic	$ 1,269	$ (1,389)	$ 3,459	$ 1,644
Basic earnings (loss) per share (usd per share)	$ 0.95	$ (1.03)	$ 2.57	$ 1.21
Diluted earnings (loss) per share (usd per share)	$ 0.94	$ (1.03)	$ 2.54	$ 1.20
Basic weighted average shares outstanding (shares)	1,342.8	1,354.0	1,348.1	1,357.2
Diluted weighted average shares outstanding (shares)	1,352.7	1,354.0	1,359.5	1,368.9