Goodwill and Intangible Assets (Schedule of Changes in the Carrying Amount of Goodwill) (Details) $ in Millions	9 Months Ended
	Dec. 30, 2016 USD ($)
Goodwill [Roll Forward]
Net balance, beginning	$ 3,148	[1]
Acquisition of Blue Coat	4,086
Translation adjustments	(7)
Net balance, ending	7,227
Consumer Security
Goodwill [Roll Forward]
Net balance, beginning	1,231
Acquisition of Blue Coat	0
Translation adjustments	(1)
Net balance, ending	1,230
Enterprise Security
Goodwill [Roll Forward]
Net balance, beginning	1,917
Acquisition of Blue Coat	4,086
Translation adjustments	(6)
Net balance, ending	$ 5,997

[1] Derived from audited financial statements.