Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Apr. 03, 2015	Mar. 28, 2014	Mar. 29, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 878us-gaap_NetIncomeLoss	$ 898us-gaap_NetIncomeLoss	$ 755us-gaap_NetIncomeLoss
Foreign currency translation adjustments:
Translation adjustments	(89)	1	5
Reclassification adjustments for (gain) loss included in net income	(1)	4	2
Net foreign currency translation adjustments	(90)	5	7
Available-for-sale securities:
Unrealized gain on available-for-sale securities, net of taxes of $0, $1, and $11, respectively	0	1	15
Reclassification adjustments for realized gain included in net income, net of taxes of $0, $(10), and $0, respectively	0	(14)	0
Net (decrease) increase from available-for-sale securities	0	(13)	15
Other comprehensive (loss) income, net of taxes	(90)	(8)	22
Comprehensive income	788	890	777
Less: Comprehensive loss attributable to noncontrolling interest	0	0	(2)
Comprehensive income attributable to Symantec Corporation stockholders	$ 788us-gaap_ComprehensiveIncomeNetOfTax	$ 890us-gaap_ComprehensiveIncomeNetOfTax	$ 779us-gaap_ComprehensiveIncomeNetOfTax

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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