Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 1,120	$ 2,013	$ 2,197	$ 3,022
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on available-for-sale securities	(9)	25	(9)	55
Currency translation	(431)	(203)	(1,255)	628
Net change in retirement obligations	21	15	48	14
Unrealized gain (loss) on derivatives	127	27	340	(144)
Other comprehensive (loss) income	(292)	(136)	(876)	553
Comprehensive income including noncontrolling interests	828	1,877	1,321	3,575
Comprehensive (income) loss attributable to noncontrolling interests	(2)	4	(4)	11
Comprehensive income attributable to Medtronic	$ 826	$ 1,881	$ 1,317	$ 3,586

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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