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Goodwill and Other Intangible Assets, Net - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 29, 2016	Jan. 23, 2015	Jan. 29, 2016	Jan. 23, 2015	Apr. 24, 2015	Jan. 26, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Purchase accounting adjustments, net			$ 393,000,000
Amortization expense	$ 484,000,000	$ 89,000,000	1,448,000,000	$ 265,000,000
Carrying amount of goodwill	40,376,000,000		40,376,000,000		$ 40,530,000,000
Goodwill impairment	0	0	0	0
Carrying amount of amortizable intangible assets	26,541,000,000		26,541,000,000		27,381,000,000
Impairment of amortizable intangible assets	0	0	0	0
Indefinite-lived Intangible Assets [Line Items]
Currency adjustment, net			(1,349,000,000)
Carrying amount of non-amortizable intangible assets	775,000,000		775,000,000		720,000,000
IPR&D [Member]
Indefinite-lived Intangible Assets [Line Items]
Carrying amount of non-amortizable intangible assets	775,000,000		775,000,000		$ 470,000,000
Impairment of non-amortizable intangible assets	$ 0	$ 0	0	$ 0
Covidien plc [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying amount of goodwill						$ 29,979,000,000
Indefinite-lived Intangible Assets [Line Items]
Currency adjustment, net			$ 1,300,000,000

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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