Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		69 Months Ended
	Feb. 06, 2015	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014	Sep. 30, 2012	Jan. 31, 2014
Loss Contingencies [Line Items]
Total net revenue		$ 1,498	$ 1,617	$ 2,997	$ 3,352
GSA Schedule Contract
Loss Contingencies [Line Items]
Total net revenue						$ 222
GSA initial analysis of damage exposure							$ 145
Current estimate of the low end of the range of estimated loss		25		25
Intellectual Ventures (IV) vs. Symantec | Judicial Ruling
Loss Contingencies [Line Items]
Damages awarded	$ 8
Class Action Lawsuit vs. Symantec, EDS and NDI
Loss Contingencies [Line Items]
Accrual for settlement		$ 30		$ 30