Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions				6 Months Ended
	Oct. 06, 2015	Sep. 02, 2014	Mar. 31, 2014	Jan. 01, 2016	Jan. 02, 2015
Dot Hill [Domain]
Business Acquisition [Line Items]
Accounts receivable, net	$ 48
Business Acquisition Costs Of Acquired Entity Cash Paid Per Share	$ 9.75
Cash paid for consideration	$ 674
LSI’s Accelerated Solutions Division (“ASD”) and Flash Components Division (“FCD”) [Member]
Business Acquisition [Line Items]
Cash paid for consideration		$ 450
Business Combination, Acquisition Related Costs					$ 1
Xyratex Ltd [Member]
Business Acquisition [Line Items]
Accounts receivable, net			$ 67
Business Acquisition Costs Of Acquired Entity Cash Paid Per Share			$ 13.25
Cash paid for consideration			$ 376
Minimum [Member]
Business Acquisition [Line Items]
Number of Weeks in Fiscal Year				52