Goodwill and Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in the Carrying Amount of Goodwill

The changes in the carrying amount of goodwill by segment are as follows:

(In millions)	Consumer Digital Safety		Enterprise Security			Total
Balance as of April 3, 2015	$	1,230	$	1,916		$	3,146
Translation adjustments	1		1			2
Balance as of April 1, 2016	1,231		1,917			3,148
Acquisition of Blue Coat	—		4,083			4,083
Acquisition of LifeLock	1,318		83			1,401
Translation adjustments	—		(5		)	(5		)
Balance as of March 31, 2017	$	2,549	$	6,078		$	8,627

Schedule of Intangible Assets, Net, Indefinite-Lived

	March 31, 2017							April 1, 2016
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	1,646	$	(322	)	$	1,324	$	406	$	(320	)	$	86
Developed technology	1,006		(229		)	777		144		(84		)	60
Finite-lived trade names	23		(6		)	17		2		(2		)	—
Patents	21		(20		)	1		21		(18		)	3
Other	2		—			2		—		—			—
Total finite-lived intangible assets	2,698		(577		)	2,121		573		(424		)	149
Indefinite-lived trade names	864		—			864		294		—			294
In-process research and development	19		—			19		—		—			—
Total	$	3,581	$	(577	)	$	3,004	$	867	$	(424	)	$	443

Schedule of Intangible Assets, Net, Finite-Lived

	March 31, 2017							April 1, 2016
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	1,646	$	(322	)	$	1,324	$	406	$	(320	)	$	86
Developed technology	1,006		(229		)	777		144		(84		)	60
Finite-lived trade names	23		(6		)	17		2		(2		)	—
Patents	21		(20		)	1		21		(18		)	3
Other	2		—			2		—		—			—
Total finite-lived intangible assets	2,698		(577		)	2,121		573		(424		)	149
Indefinite-lived trade names	864		—			864		294		—			294
In-process research and development	19		—			19		—		—			—
Total	$	3,581	$	(577	)	$	3,004	$	867	$	(424	)	$	443

Schedule of Future Intangible Asset Amortization Expense

As of March 31, 2017, future amortization expense related to intangible assets that have finite lives is as follows by fiscal year:

(In millions)	March 31, 2017
2018	$	452
2019	426
2020	407
2021	295
2022	235
Thereafter	306
Total	$	2,121