Goodwill and Other Intangible Assets, Net (Tables)

3 Months Ended

Jul. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill for the three months ended July 31, 2015 are as follows:

(in millions)	Cardiac and Vascular Group			Minimally Invasive Therapies Group		Restorative Therapies Group		Diabetes Group		Total
Balance as of April 24, 2015	$	5,855		$	23,399	$	9,424	$	1,852	$	40,530
Goodwill as a result of acquisitions	95			—		—		—		95
Purchase accounting adjustments, net	—			28		6		—		34
Currency adjustment, net	(6		)	—		3		1		(2		)
Balance as of July 31, 2015	$	5,944		$	23,427	$	9,433	$	1,853	$	40,657

Schedule of Indefinite-Lived Intangible Assets [Table Text Block]

The gross carrying amount and accumulated amortization of intangible assets at July 31, 2015 and April 24, 2015 are as follows:

	July 31, 2015					April 24, 2015
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Amortizable:
Customer-related	$	18,495	$	(537	)	$	18,492	$	(273	)
Purchased technology and patents	11,142		(2,457		)	11,118		(2,268		)
Trademarks and tradenames	850		(384		)	640		(363		)
Other	79		(45		)	79		(44		)
Total	$	30,566	$	(3,423	)	$	30,329	$	(2,948	)
Non-Amortizable:
IPR&D	$	556				$	470
Tradenames	—					250
Total	$	556				$	720

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The gross carrying amount and accumulated amortization of intangible assets at July 31, 2015 and April 24, 2015 are as follows:

	July 31, 2015					April 24, 2015
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Amortizable:
Customer-related	$	18,495	$	(537	)	$	18,492	$	(273	)
Purchased technology and patents	11,142		(2,457		)	11,118		(2,268		)
Trademarks and tradenames	850		(384		)	640		(363		)
Other	79		(45		)	79		(44		)
Total	$	30,566	$	(3,423	)	$	30,329	$	(2,948	)
Non-Amortizable:
IPR&D	$	556				$	470
Tradenames	—					250
Total	$	556				$	720

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 July 31, 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 2016	$	1,453
2017	1,890
2018	1,860
2019	1,768
2020	1,720
2021	1,703