Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Oct. 27, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

The following table presents the changes in the carrying amount of goodwill by reportable segment:

(in millions)	Cardiac and Vascular Group		Minimally Invasive Therapies Group		Restorative Therapies Group		Diabetes Group			Total
April 28, 2017	$	6,651	$	20,411	$	9,600	$	1,853		$	38,515
Goodwill as a result of acquisitions	—		—		9		6			15
Purchase accounting adjustments	54		—		—		—			54
Currency and other adjustments, net	48		405		41		(1		)	493
October 27, 2017	$	6,753	$	20,816	$	9,650	$	1,858		$	39,077

Gross Carrying Amount of Indefinite-Lived Intangible Assets

The following table presents the gross carrying amount and accumulated amortization of intangible assets:

	October 27, 2017					April 28, 2017
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Definite-lived:
Customer-related	$	16,964	$	(2,652	)	$	16,862	$	(2,166	)
Purchased technology and patents	11,479		(4,038		)	11,461		(3,690		)
Trademarks and tradenames	821		(544		)	772		(461		)
Other	80		(46		)	77		(42		)
Total	$	29,344	$	(7,280	)	$	29,172	$	(6,359	)
Indefinite-lived:
IPR&D	$	561				$	594

Gross Carrying Amount and Accumulated Amortization of Definite-Lived Intangible Assets

The following table presents the gross carrying amount and accumulated amortization of intangible assets:

	October 27, 2017					April 28, 2017
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Definite-lived:
Customer-related	$	16,964	$	(2,652	)	$	16,862	$	(2,166	)
Purchased technology and patents	11,479		(4,038		)	11,461		(3,690		)
Trademarks and tradenames	821		(544		)	772		(461		)
Other	80		(46		)	77		(42		)
Total	$	29,344	$	(7,280	)	$	29,172	$	(6,359	)
Indefinite-lived:
IPR&D	$	561				$	594

Estimated Future Aggregate Amortization Expense, Definite-Lived Intangible Assets

Estimated aggregate amortization expense by fiscal year based on the carrying value of definite-lived intangible assets at October 27, 2017, excluding any possible future amortization associated with acquired IPR&D which has not yet met technological feasibility, is as follows:

(in millions)	Amortization Expense
Remaining 2018	$	871
2019	1,672
2020	1,622
2021	1,601
2022	1,561
2023	1,490