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Guarantor Financial Information , Consolidating Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Apr. 28, 2017	Jan. 27, 2017	Oct. 28, 2016	Jul. 29, 2016	Apr. 29, 2016	Jan. 29, 2016	Oct. 30, 2015	Jul. 31, 2015	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Condensed Statement of Income Captions [Line Items]
Net sales	$ 7,916	$ 7,283	$ 7,345	$ 7,166	$ 7,567	$ 6,934	$ 7,058	$ 7,274	$ 29,710	$ 28,833	$ 20,261
Costs and expenses:
Cost of products sold									9,291	9,142	6,309
Research and development expense									2,193	2,224	1,640
Selling, general, and administrative expense									9,711	9,469	6,904
Special charge (gain), net									100	70	(38)
Restructuring charges, net									363	290	237
Certain litigation charges									300	26	42
Acquisition-related items									220	283	550
Amortization of intangible assets									1,980	1,931	733
Other expense, net									222	107	118
Operating profit									5,330	5,291	3,766
Interest income									(366)	(431)	(386)
Interest expense									1,094	1,386	666
Interest expense, net									728	955	280
Equity in net (income) loss of subsidiaries									0	0	0
Income before provision for income taxes									4,602	4,336	3,486
Provision for income taxes									578	798	811
Net income	1,164	820	1,111	929	1,104	1,095	520	820	4,024	3,538	2,675
Net loss attributable to noncontrolling interests									4	0	0
Net income attributable to Medtronic	$ 1,163	$ 821	$ 1,115	$ 929	$ 1,104	$ 1,095	$ 520	$ 820	4,028	3,538	2,675
Other comprehensive loss									(744)	(684)	(587)
Other comprehensive loss attributable to non-controlling interests									3
Other comprehensive (loss) income, net of tax										(684)	(587)
Comprehensive income attributable to Medtronic									3,283	2,854	2,088
Consolidating Adjustments | Medtronic Notes
Condensed Statement of Income Captions [Line Items]
Net sales									(1,294)	(1,410)	(1,261)
Costs and expenses:
Cost of products sold									(1,317)	(1,410)	(1,245)
Research and development expense									0	0	0
Selling, general, and administrative expense									0	0	0
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									0	0	0
Operating profit									23	0	(16)
Interest income									1,598	960	227
Interest expense									(1,598)	(960)	(227)
Interest expense, net									0	0	0
Equity in net (income) loss of subsidiaries									10,223	9,103	10,910
Income before provision for income taxes									(10,200)	(9,103)	(10,926)
Provision for income taxes									0	0	0
Net income									(10,200)
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									(10,200)	(9,103)	(10,926)
Other comprehensive loss									1,563
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										1,850	1,361
Comprehensive income attributable to Medtronic									(8,637)	(7,253)	(9,565)
Consolidating Adjustments | CIFSA Senior Notes
Condensed Statement of Income Captions [Line Items]
Net sales									0	0	0
Costs and expenses:
Cost of products sold									0	0	0
Research and development expense									0	0	0
Selling, general, and administrative expense									0	0	0
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									0	0	0
Operating profit									0	0	0
Interest income									805	1,177	319
Interest expense									(805)	(1,177)	(319)
Interest expense, net									0	0	0
Equity in net (income) loss of subsidiaries									10,067	8,680	4,372
Income before provision for income taxes									(10,067)	(8,680)	(4,372)
Provision for income taxes									0	0	0
Net income									(10,067)
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									(10,067)	(8,680)	(4,372)
Other comprehensive loss									1,574
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										1,470	974
Comprehensive income attributable to Medtronic									(8,493)	(7,210)	(3,398)
Medtronic plc | Medtronic Notes
Condensed Statement of Income Captions [Line Items]
Net sales									0	0	0
Costs and expenses:
Cost of products sold									0	0	0
Research and development expense									0	0	0
Selling, general, and administrative expense									12	10	1
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									18	112	103
Operating profit									(30)	(122)	(104)
Interest income									0	0	0
Interest expense									113	25	0
Interest expense, net									113	25	0
Equity in net (income) loss of subsidiaries									(4,163)	(3,676)	(2,790)
Income before provision for income taxes									4,020	3,529	2,686
Provision for income taxes									(8)	(9)	11
Net income									4,028
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									4,028	3,538	2,675
Other comprehensive loss									(745)
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										(684)	(587)
Comprehensive income attributable to Medtronic									3,283	2,854	2,088
Medtronic plc | CIFSA Senior Notes
Condensed Statement of Income Captions [Line Items]
Net sales									0	0	0
Costs and expenses:
Cost of products sold									0	0	0
Research and development expense									0	0	0
Selling, general, and administrative expense									12	10	1
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									18	112	103
Operating profit									(30)	(122)	(104)
Interest income									0	0	0
Interest expense									113	25	0
Interest expense, net									113	25	0
Equity in net (income) loss of subsidiaries									(4,163)	(3,676)	(2,790)
Income before provision for income taxes									4,020	3,529	2,686
Provision for income taxes									(8)	(9)	11
Net income									4,028
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									4,028	3,538	2,675
Other comprehensive loss									(745)
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										(684)	(587)
Comprehensive income attributable to Medtronic									3,283	2,854	2,088
Subsidiary Issuer | Medtronic Notes
Condensed Statement of Income Captions [Line Items]
Net sales									1,296	1,411	1,261
Costs and expenses:
Cost of products sold									932	991	895
Research and development expense									636	627	552
Selling, general, and administrative expense									1,163	991	857
Special charge (gain), net									100	70	100
Restructuring charges, net									114	17	7
Certain litigation charges									0	0	0
Acquisition-related items									133	135	312
Amortization of intangible assets									11	12	11
Other expense, net									(2,954)	(2,329)	(1,618)
Operating profit									1,161	897	145
Interest income									(250)	(237)	(56)
Interest expense									1,652	1,906	762
Interest expense, net									1,402	1,669	706
Equity in net (income) loss of subsidiaries									(2,484)	(2,447)	(5,500)
Income before provision for income taxes									2,243	1,675	4,939
Provision for income taxes									(1)	(96)	(44)
Net income									2,244
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									2,244	1,771	4,983
Other comprehensive loss									111
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										(493)	(542)
Comprehensive income attributable to Medtronic									2,355	1,278	4,441
Subsidiary Issuer | CIFSA Senior Notes
Condensed Statement of Income Captions [Line Items]
Net sales									0	0	0
Costs and expenses:
Cost of products sold									0	0	0
Research and development expense									0	0	0
Selling, general, and administrative expense									1	1	0
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									1	1	0
Operating profit									(2)	(2)	0
Interest income									(82)	(434)	(149)
Interest expense									104	138	29
Interest expense, net									22	(296)	(120)
Equity in net (income) loss of subsidiaries									(2,329)	(2,043)	1,085
Income before provision for income taxes									2,305	2,337	(965)
Provision for income taxes									0	0	0
Net income									2,305
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									2,305	2,337	(965)
Other comprehensive loss									(84)
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										(102)	200
Comprehensive income attributable to Medtronic									2,221	2,235	(765)
Subsidiary Guarantors | Medtronic Notes
Condensed Statement of Income Captions [Line Items]
Net sales									0	0	0
Costs and expenses:
Cost of products sold									0	0	0
Research and development expense									0	0	0
Selling, general, and administrative expense									0	0	0
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									0	0	0
Operating profit									0	0	0
Interest income									(649)	(706)	(170)
Interest expense									62	10	0
Interest expense, net									(587)	(696)	(170)
Equity in net (income) loss of subsidiaries									(3,576)	(2,980)	(2,620)
Income before provision for income taxes									4,163	3,676	2,790
Provision for income taxes									0	0	0
Net income									4,163
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									4,163	3,676	2,790
Other comprehensive loss									(745)
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										(684)	(587)
Comprehensive income attributable to Medtronic									3,418	2,992	2,203
Subsidiary Guarantors | CIFSA Senior Notes
Condensed Statement of Income Captions [Line Items]
Net sales									0	0	0
Costs and expenses:
Cost of products sold									0	0	0
Research and development expense									0	0	0
Selling, general, and administrative expense									2	3	21
Special charge (gain), net									0	0	0
Restructuring charges, net									0	0	0
Certain litigation charges									0	0	0
Acquisition-related items									0	0	0
Amortization of intangible assets									0	0	0
Other expense, net									4	(18)	26
Operating profit									(6)	15	(47)
Interest income									(656)	(710)	(170)
Interest expense									62	10	0
Interest expense, net									(594)	(700)	(170)
Equity in net (income) loss of subsidiaries									(3,575)	(2,961)	(2,667)
Income before provision for income taxes									4,163	3,676	2,790
Provision for income taxes									0	0	0
Net income									4,163
Net loss attributable to noncontrolling interests									0
Net income attributable to Medtronic									4,163	3,676	2,790
Other comprehensive loss									(745)
Other comprehensive loss attributable to non-controlling interests									0
Other comprehensive (loss) income, net of tax										(684)	(587)
Comprehensive income attributable to Medtronic									3,418	2,992	2,203
Subsidiary Non-guarantors | Medtronic Notes
Condensed Statement of Income Captions [Line Items]
Net sales									29,708	28,832	20,261
Costs and expenses:
Cost of products sold									9,676	9,561	6,659
Research and development expense									1,557	1,597	1,088
Selling, general, and administrative expense									8,536	8,468	6,046
Special charge (gain), net									0	0	(138)
Restructuring charges, net									249	273	230
Certain litigation charges									300	26	42
Acquisition-related items									87	148	238
Amortization of intangible assets									1,969	1,919	722
Other expense, net									3,158	2,324	1,633
Operating profit									4,176	4,516	3,741
Interest income									(1,065)	(448)	(387)
Interest expense									865	405	131
Interest expense, net									(200)	(43)	(256)
Equity in net (income) loss of subsidiaries									0	0	0
Income before provision for income taxes									4,376	4,559	3,997
Provision for income taxes									587	903	844
Net income									3,789
Net loss attributable to noncontrolling interests									4
Net income attributable to Medtronic									3,793	3,656	3,153
Other comprehensive loss									(928)
Other comprehensive loss attributable to non-controlling interests									3
Other comprehensive (loss) income, net of tax										(673)	(232)
Comprehensive income attributable to Medtronic									2,864	2,983	2,921
Subsidiary Non-guarantors | CIFSA Senior Notes
Condensed Statement of Income Captions [Line Items]
Net sales									29,710	28,833	20,261
Costs and expenses:
Cost of products sold									9,291	9,142	6,309
Research and development expense									2,193	2,224	1,640
Selling, general, and administrative expense									9,696	9,455	6,882
Special charge (gain), net									100	70	(38)
Restructuring charges, net									363	290	237
Certain litigation charges									300	26	42
Acquisition-related items									220	283	550
Amortization of intangible assets									1,980	1,931	733
Other expense, net									199	12	(11)
Operating profit									5,368	5,400	3,917
Interest income									(433)	(464)	(386)
Interest expense									1,620	2,390	956
Interest expense, net									1,187	1,926	570
Equity in net (income) loss of subsidiaries									0	0	0
Income before provision for income taxes									4,181	3,474	3,347
Provision for income taxes									586	807	800
Net income									3,595
Net loss attributable to noncontrolling interests									4
Net income attributable to Medtronic									3,599	2,667	2,547
Other comprehensive loss									(744)
Other comprehensive loss attributable to non-controlling interests									3
Other comprehensive (loss) income, net of tax										(684)	(587)
Comprehensive income attributable to Medtronic									$ 2,854	$ 1,983	$ 1,960

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