Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
Apr. 27, 2018	Apr. 28, 2017	Apr. 29, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 3,095	$ 4,024	$ 3,538
Other comprehensive gain (loss), net of tax:
Unrealized (loss) gain on available-for-sale securities	(103)	38	(121)
Translation adjustment	1,184	(977)	(197)
Net change in retirement obligations	167	68	(66)
Unrealized (loss) gain on derivatives	(218)	127	(300)
Other comprehensive gain (loss)	1,030	(744)	(684)
Comprehensive income including noncontrolling interests	4,125	3,280	2,854
Comprehensive loss attributable to noncontrolling interests	9	3	0
Comprehensive income attributable to Medtronic	$ 4,134	$ 3,283	$ 2,854

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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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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