Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Apr. 24, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for fiscal years 2015 and 2014 are as follows:



(in millions)	Cardiac and Vascular Group			Minimally Invasive Therapies Group		Restorative Therapies Group			Diabetes Group			Total
Balance as of April 26, 2013	$	2,624		$	—	$	6,361		$	1,344		$	10,329
Goodwill as a result of acquisitions	279			—		—			—			279
Other adjustments, net	(8		)	—		7			—			(1		)
Currency adjustment, net	(14		)	—		—			—			(14		)
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

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 2015 and 2014 are as follows:



	Fiscal Year 2015					Fiscal Year 2014
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Amortizable:
Customer-related	$	18,492	$	(273	)	$	76	$	(6	)
Purchased technology and patents	11,118		(2,268		)	3,857		(1,878		)
Trademarks and tradenames	640		(363		)	408		(332		)
Other	79		(44		)	124		(82		)
Total	$	30,329	$	(2,948	)	$	4,465	$	(2,298	)
Non-Amortizable:
IPR&D	$	470				$	119
Tradenames	250					—
Total	$	720				$	119

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 2015 and 2014 are as follows:



	Fiscal Year 2015					Fiscal Year 2014
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Amortizable:
Customer-related	$	18,492	$	(273	)	$	76	$	(6	)
Purchased technology and patents	11,118		(2,268		)	3,857		(1,878		)
Trademarks and tradenames	640		(363		)	408		(332		)
Other	79		(44		)	124		(82		)
Total	$	30,329	$	(2,948	)	$	4,465	$	(2,298	)
Non-Amortizable:
IPR&D	$	470				$	119
Tradenames	250					—
Total	$	720				$	119

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated aggregate amortization expense based on the current carrying value of amortizable 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
2016	$	1,911
2017	1,889
2018	1,858
2019	1,765
2020	1,717