Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended					3 Months Ended					3 Months Ended	12 Months Ended					3 Months Ended
	Jul. 02, 2010	Mar. 29, 2013	Mar. 30, 2012	Apr. 01, 2011	Apr. 02, 2010	Jan. 15, 2010	Dec. 28, 2012 VERITAS Court Decision [Member]	Dec. 30, 2011 VERITAS Court Decision [Member]	Mar. 29, 2013 U.S. Federal [Member]	Mar. 29, 2013 State [Member]	Mar. 29, 2013 Foreign Earnings [Member]	Apr. 01, 2011 Irish Revenue [Member]	Mar. 29, 2013 Minimum [Member] U.S. Federal [Member]	Mar. 29, 2013 Minimum [Member] State [Member]	Mar. 29, 2013 Maximum [Member] U.S. Federal [Member]	Mar. 29, 2013 Maximum [Member] State [Member]	Mar. 29, 2013 Undistributed Earnings Of Foreign Subsidiaries And Foreign Corporate Joint Ventures [Member]	Mar. 29, 2013 VERITAS Court Decision [Member]
Income Taxes [Line Items]
Pretax income (loss) from international operations		$ 652,000,000	$ 891,000,000	$ 460,000,000
Valuation allowance		66,000,000	55,000,000
Change in valuation allowance		11,000,000
Operating loss carryforwards									90,000,000	279,000,000	331,000,000
Tax credit carryforward										68,000,000
Operating loss expiration date													2014	2014	2032	2032
Deferred tax assets		402,000,000	528,000,000
Cumulative unremitted foreign earnings																	2,800,000,000
Unrecognized deferred tax liability																	830,000,000
Change in gross unrecognized tax benefit		207,000,000
Unrecognized tax benefits resulting from purchase accounting		1,000,000
Unrecognized tax benefits which would affect the effective income tax rate		411,000,000
Unrecognized tax benefits which would affect cumulative translation adjustments		1,000,000
Accrued penalties and interest		46,000,000
Interest and penalties included in the provision for income taxes		37,000,000
Unrecognized tax benefits, interest on income taxes accrued		12,000,000
Original IRS Assessment						80,000,000
Decrease of unrecognized tax benefits as a result of tax court decision	39,000,000	114,000,000	62,000,000	6,000,000
Unrecognized tax benefits		412,000,000	619,000,000	527,000,000	543,000,000			52,000,000
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, lower bound		15,000,000
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound		130,000,000
Potential affect on income tax provision		15,000,000
Amount on deposit with the IRS pertaining to US Tax matters in the VERITAS 2002-2005 and Symantec 2005-2008 audit cycles		76,000,000
Additional income tax benefit resulting from agreement							$ 3,000,000					$ 10,000,000						$ 7,000,000