Goodwill and Other Intangible Assets, Net (Tables)

12 Months Ended

Apr. 29, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for fiscal years 2016 and 2015 are as follows:



(in millions)	Cardiac and Vascular Group			Minimally Invasive Therapies Group			Restorative Therapies Group			Diabetes Group			Total
Balance as of April 25, 2014	$	2,881		$	—		$	6,368		$	1,344		$	10,593
Goodwill as a result of Covidien acquisition	2,795			23,399			2,892			500			29,586
Goodwill as a result of other acquisitions	245			—			218			9			472
Other adjustments, net	—			—			(9		)	—			(9		)
Currency adjustment, net	(66		)	—			(45		)	(1		)	(112		)
Balance as of April 24, 2015	$	5,855		$	23,399		$	9,424		$	1,852		$	40,530
Goodwill as a result of acquisitions	393			264			199			—			856
Measurement period adjustments related to Covidien	21			346			26			—			393
Other adjustments, net	—			(34		)	3			—			(31		)
Currency adjustment, net	(26		)	(191		)	(32		)	1			(248		)
Balance as of April 29, 2016	$	6,243		$	23,784		$	9,620		$	1,853		$	41,500

Schedule of Finite-Lived Intangible Assets by Major Class

The gross carrying amount and accumulated amortization of intangible assets at the end of fiscal years 2016 and 2015 are as follows:



	Fiscal Year 2016					Fiscal Year 2015
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Definite-lived
Customer-related	$	18,596	$	(1,331	)	$	18,492	$	(273	)
Purchased technology and patents	11,397		(2,976		)	11,118		(2,268		)
Trademarks and tradenames	854		(403		)	640		(363		)
Other	72		(31		)	79		(44		)
Total	$	30,919	$	(4,741	)	$	30,329	$	(2,948	)
Indefinite-lived
IPR&D	$	721				$	470
Tradenames	—					250
Total	$	721				$	720

Schedule of Indefinite-Lived Intangible Assets by Major Class

The gross carrying amount and accumulated amortization of intangible assets at the end of fiscal years 2016 and 2015 are as follows:



	Fiscal Year 2016					Fiscal Year 2015
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Definite-lived
Customer-related	$	18,596	$	(1,331	)	$	18,492	$	(273	)
Purchased technology and patents	11,397		(2,976		)	11,118		(2,268		)
Trademarks and tradenames	854		(403		)	640		(363		)
Other	72		(31		)	79		(44		)
Total	$	30,919	$	(4,741	)	$	30,329	$	(2,948	)
Indefinite-lived
IPR&D	$	721				$	470
Tradenames	—					250
Total	$	721				$	720

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated aggregate amortization expense by fiscal year based on the current carrying value of definite-lived intangible assets, excluding any possible future amortization associated with acquired IPR&D, which has not met technological feasibility, is as follows:



(in millions) Fiscal Year	Amortization Expense
2017	$	1,931
2018	1,899
2019	1,805
2020	1,757
2021	1,739