Earnings Per Share (Schedule Of Components Of Earnings Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2013		Mar. 30, 2012	Apr. 01, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income attributable to Symantec Corporation stockholders	$ 765		$ 1,172	$ 597
Net income per share attributable to Symantec Corporation stockholders-basic	$ 1.09		$ 1.58	$ 0.77
Net income per share attributable to Symantec Corporation stockholders-diluted	$ 1.08		$ 1.57	$ 0.76
Weighted average outstanding common shares attributable to Symantec Corporation stockholders-basic	701		741	778
Diliutive potential shares issuable from assumed exercise of stock options	2		3	4
Dilutive potential shares related to stock award plans	6		4	4
Dilutive potential shares related to convertible senior notes	2	[1]
Total weighted-average shares outstanding attributable to Symantec Corporation stockholders-diluted	711		748	786
Anti-dilutive weighted-average stock options	20		32	47
Anti-dilutive weighted-average restricted stock	2			1
Anti-dilutive effect of note hedge	2	[1]
Conversion price for dilution	$ 19.12
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion price for dilution	$ 27.3175

[1] See Note 6 for information regarding the effects of the convertible senior notes, and the warrants issued and the option purchased in connection with the convertible senior notes.