Goodwill and Other Intangible Assets, Net (Tables)

9 Months Ended

Jan. 23, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the nine months ended January 23, 2015 are as follows:



(in millions)	Cardiac and Vascular 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 acquisitions	234			219			—		453
Other adjustments, net	—			(15		)	—		(15		)
Currency adjustment, net	(47		)	(34		)	—		(81		)
Balance as of January 23, 2015	$	3,068		$	6,538		$	1,344	$	10,950

Schedule of Intangible Assets by Major Class

Balances of other intangible assets, net, excluding goodwill as of January 23, 2015 and April 25, 2014 are as follows:



(in millions)	Purchased Technology and Patents			Trademarks and Tradenames			Acquired IPR&D		Other			Total
Other intangible assets as of January 23, 2015:
Original cost	$	3,947		$	426		$	164	$	293		$	4,830
Accumulated amortization	(2,086		)	(343		)	—		(62		)	(2,491		)
Carrying value	$	1,861		$	83		$	164	$	231		$	2,339
Other intangible assets as of April 25, 2014:
Original cost	$	3,857		$	408		$	119	$	200		$	4,584
Accumulated amortization	(1,878		)	(332		)	—		(88		)	(2,298		)
Carrying value	$	1,979		$	76		$	119	$	112		$	2,286

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated aggregate amortization expense based on the current carrying value of amortizable intangible assets as of January 23, 2015, excluding any possible future amortization associated with acquired IPR&D, which has not met technological feasibility, is as follows:



(in millions) Fiscal Year	Estimated Amortization Expense
Remaining 2015	$	96
2016	347
2017	325
2018	309
2019	265
2020	217
Thereafter	616
Total estimated amortization expense	$	2,175