Fair Value Measurements (Details) (USD $)	9 Months Ended
Jan. 02, 2015	Mar. 28, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Transfers between fair value measurement levels	$ 0symc_FairValueAssetsTransfersAmount
Level 2
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair value of debt	$ 2,200,000,000	$ 2,200,000,000

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13476-108611

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant