Goodwill and Other Intangible Assets, Net (Tables)

3 Months Ended

Jul. 25, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the three months ended July 25, 2014 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	50			49		—		99
Other adjustments, net	(2		)	—		—		(2		)
Currency adjustment, net	5			1		—		6
Balance as of July 25, 2014	$	2,934		$	6,418	$	1,344	$	10,696

Schedule of Intangible Assets by Major Class

Balances of other intangible assets, net, excluding goodwill as of July 25, 2014 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 July 25, 2014:
Original cost	$	3,992		$	408		$	116	$	190		$	4,706
Accumulated amortization	(1,946		)	(337		)	—		(82		)	(2,365		)
Carrying value	$	2,046		$	71		$	116	$	108		$	2,341
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, 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	$	275
2016	331
2017	309
2018	293
2019	249
2020	204
Thereafter	564
Total estimated amortization expense	$	2,225