Acquisitions (Details) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended			1 Months Ended	3 Months Ended	6 Months Ended				1 Months Ended	3 Months Ended	6 Months Ended					1 Months Ended		1 Months Ended				1 Months Ended		1 Months Ended					6 Months Ended
	Dec. 28, 2012 USD ($)	Dec. 30, 2011 USD ($)	Dec. 28, 2012 USD ($)	Dec. 30, 2011 USD ($)	Jun. 29, 2012 USD ($)	Dec. 30, 2011 Samsungs Hard Disk Drive Operations [Member] Y	Dec. 30, 2011 Samsungs Hard Disk Drive Operations [Member] USD ($)	Dec. 28, 2012 Samsungs Hard Disk Drive Operations [Member] USD ($)	Dec. 30, 2011 Samsungs Hard Disk Drive Operations [Member] USD ($)	Dec. 19, 2011 Samsungs Hard Disk Drive Operations [Member] USD ($) Y	Jul. 01, 2011 Samsungs Hard Disk Drive Operations [Member] USD ($)	Aug. 31, 2012 LaCie S.A. [Member] Y	Sep. 28, 2012 LaCie S.A. [Member] USD ($)	Dec. 28, 2012 LaCie S.A. [Member] USD ($)	Aug. 03, 2012 LaCie S.A. [Member] USD ($)	Aug. 03, 2012 LaCie S.A. [Member] EUR (€)	Dec. 28, 2012 Customer Relationships [Member] USD ($)	Jun. 29, 2012 Customer Relationships [Member] USD ($)	Dec. 30, 2011 Customer Relationships [Member] Samsungs Hard Disk Drive Operations [Member] Y	Dec. 19, 2011 Customer Relationships [Member] Samsungs Hard Disk Drive Operations [Member] USD ($)	Aug. 31, 2012 Customer Relationships [Member] LaCie S.A. [Member] Y	Aug. 03, 2012 Customer Relationships [Member] LaCie S.A. [Member] USD ($)	Dec. 28, 2012 Existing Technology [Member] USD ($)	Jun. 29, 2012 Existing Technology [Member] USD ($)	Dec. 30, 2011 Existing Technology [Member] Samsungs Hard Disk Drive Operations [Member] Y	Dec. 19, 2011 Existing Technology [Member] Samsungs Hard Disk Drive Operations [Member] USD ($)	Aug. 31, 2012 Existing Technology [Member] LaCie S.A. [Member] Y	Aug. 03, 2012 Existing Technology [Member] LaCie S.A. [Member] USD ($)	Dec. 28, 2012 IP R&D USD ($)	Jun. 29, 2012 IP R&D USD ($)	Dec. 19, 2011 IP R&D Samsungs Hard Disk Drive Operations [Member] USD ($)	Dec. 28, 2012 Noncontrolling Interest [Member] USD ($)
Business Acquisition [Line Items]
Business Acquisitions Pro Forma Adjustments for Additional Depreciation and Amortization							$ 33		$ 85
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles								5						1
Business Acquisition Number Of Shares Acquired															23,382,904	23,382,904
Business Acquisition Costs Of Acquired Entity Cash Paid Per Share																€ 4.05
Business Acquisition, Contingent Consideration Per Share																€ 0.12
Business Acquistion Prepaid Compensation Cost Performance Period															36	36
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents															71
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables															29
Net Income (Loss) Attributable to Parent	492	563	1,074	703
Acquired Finite-lived Intangible Asset, Amount	583		583		536					536							431	399		399		31	138	137		137		1
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life						4.8						5.0							5.8		5.0				2.0		5.0
Cash paid for consideration										571					107
Business Acquisition, Contingent Consideration, Potential Cash Payment															4
Cash paid as a deposit											10
Ordinary shares included in consideration						45,200,000
Fair value of ordinary shares included in consideration										569
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value															(72)
Percentage of discount on market price for lack of marketability										16.50%
Restriction period on trading of shares issued as consideration (in years)						1,000,000
Business Combination Provisional Information Initial Accounting Incomplete Adjustment Other Assets								7
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment								3
Business Combination Provisional Information Initial Accounting Incomplete Adjustment Warranty Liability								3
Business Combination Provisional Information Initial Accounting Incomplete Adjustment Other Liabilities								2
Business Acquisition, Product Warranty Liability Assumed, Term										3,000,000
Business Acquisition Measurement Period						1,000,000
Business Combination, Acquisition Related Costs														1
Noncontrolling Interest, Payment For Deposit To Acquire Noncontrolling Shares			72	0									(72)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests			58																													59
Noncontrolling Interest, Percentage Acquired During Period														29.00%
Noncontrolling Interest, Ownership Percentage by Parent														93.50%
Business Acquisition, Percentage of Voting Interests Acquired															64.50%	64.50%
Common Stock, Par or Stated Value Per Share	$ 0.00001		$ 0.00001
Business Acquisition, Contingent Consideration Threshold (Percent)															95.00%	95.00%
Business Acquisition, Contingent Consideration Condition Must Be Reached (Period)															6	6
Business Acquisition Prepaid Compensation Cost At Fair Vaule																9
Assets Acquired and Liabilities Assumed
Inventories										141					46
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment										76					12
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets															45
Business Acquisition, Purchase Price Allocation, Goodwill Amount										432					13
Business Acquisition, Purchase Price Allocation, Assets Acquired										825					262
Business Acquisition, Purchase Price Allocation, Warranty Liability										72
Business Acquisition, Purchase Price Allocation, Current Liabilities, Other Liabilities										(45)					(6)
Business Acquisition, Purchase Price Allocation, Liabilities Assumed										(117)					(79)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net										708
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount										4
Total purchase price										1,140					111
Acquired Indefinite-lived Intangible Asset, Amount																													44	44	44
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangibles										580					45
Noncontrolling Interest, Increase from Business Combination			72																													72
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0																												0
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net															111
Business Acquisition, Purchase Price Allocation, Current Assets, Marketable Securities															27
Business Acquisition, Purchase Price Allocation, Other Assets										28					19
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable And Other															$ (73)