Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
Jul. 27, 2018	Jul. 28, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 1,077	$ 1,009
Other comprehensive (loss) income, net of tax:
Unrealized gain on available-for-sale securities	0	30
Currency translation	(824)	831
Net change in retirement obligations	27	(1)
Unrealized gain (loss) on derivatives	213	(171)
Other comprehensive (loss) income	(584)	689
Comprehensive income including noncontrolling interests	493	1,698
Comprehensive (income) loss attributable to noncontrolling interests	(2)	7
Comprehensive income attributable to Medtronic	$ 491	$ 1,705

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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