Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Aug. 09, 2012	Dec. 30, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	WESTERN DIGITAL CORP
Entity Central Index Key	0000106040
Document Type	10-K
Document Period End Date	Jun. 29, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--06-29
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 7.3
Entity Common Stock, Shares Outstanding (actual number)		247,262,090

Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Current assets:
Cash and cash equivalents	$ 3,208	$ 3,490
Accounts receivable, net	2,364	1,206
Inventories	1,210	577
Other current assets	359	214
Total current assets	7,141	5,487
Property, plant and equipment, net	4,067	2,224
Goodwill	1,975	151
Other intangible assets, net	799	71
Other non-current assets	224	185
Total assets	14,206	8,118
Current liabilities:
Accounts payable	2,773	1,545
Accrued expenses	858	349
Accrued warranty	171	132
Current portion of long-term debt	230	144
Total current liabilities	4,032	2,170
Long-term debt	1,955	150
Other liabilities	550	310
Total liabilities	6,537	2,630
Commitments and contingencies (Notes 4 and 5)
Shareholders' equity:
Preferred stock, $.01 par value; authorized - 5 shares; issued and outstanding - none
Common stock, $.01 par value; authorized - 450 shares; issued and outstanding - 246 and 233 shares, respectively	3	2
Additional paid-in capital	2,223	1,091
Accumulated other comprehensive loss	(15)	(5)
Retained earnings	6,012	4,400
Treasury stock - common shares at cost; 15 shares and none, respectively	(554)
Total shareholders' equity	7,669	5,488
Total liabilities and shareholders' equity	$ 14,206	$ 8,118

Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5	5
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	450	450
Common stock, shares issued	246	233
Common stock, shares outstanding	246	233
Treasury stock, shares	15

Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Consolidated Statements of Income [Abstract]
Revenue, net	$ 12,478	$ 9,526	$ 9,850
Cost of revenue	8,840	7,735	7,449
Gross margin	3,638	1,791	2,401
Operating expenses:
Research and development	1,055	703	611
Selling, general and administrative	518	307	265
Charges related to flooding, net	214
Impairment and other charges	80
Total operating expenses	1,867	1,010	876
Operating income	1,771	781	1,525
Other income (expense):
Interest income	12	9	4
Interest and other expense	(26)	(10)	(9)
Total other expense, net	(14)	(1)	(5)
Income before income taxes	1,757	780	1,520
Income tax provision	145	54	138
Net income	$ 1,612	$ 726	$ 1,382
Income per common share:
Basic	$ 6.69	$ 3.14	$ 6.06
Diluted	$ 6.58	$ 3.09	$ 5.93
Weighted average shares outstanding:
Basic	241	231	228
Diluted	245	235	233

Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Cash flows from operating activities
Net income	$ 1,612	$ 726	$ 1,382
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	825	602	510
Stock-based compensation	92	69	60
Deferred income taxes	34	20	27
Non-cash portion of charges related to flooding	119
Non-cash portion of impairment and other charges	61
Changes in:
Accounts receivable, net	162	50	(330)
Inventories	88	(17)	(148)
Accounts payable	132	178	270
Accrued expenses	(128)	71	67
Other assets and liabilities	70	(44)	104
Net cash provided by operating activities	3,067	1,655	1,942
Cash flows from investing activities
Purchases of property, plant and equipment	(717)	(778)	(737)
Acquisitions, net of cash acquired	(3,526)	(15)	(253)
Proceeds from the sale of equipment	76
Sales and maturities of investments			4
Net cash used in investing activities	(4,167)	(793)	(986)
Cash flows from financing activities
Issuance of stock under employee stock plans	74	58	79
Taxes paid on vested stock awards under employee stock plans	(15)	(8)	(17)
Excess tax benefits from employee stock plans	82		4
Repurchases of common stock	(604)	(50)
Proceeds from debt, net of issuance costs	2,775
Repayment of debt	(908)	(106)	(82)
Repayment of assumed debt	(585)
Net cash provided by (used in) financing activities	819	(106)	(16)
Effect of exchange rate changes on cash	(1)
Net increase (decrease) in cash and cash equivalents	(282)	756	940
Cash and cash equivalents, beginning of year	3,490	2,734	1,794
Cash and cash equivalents, end of year	3,208	3,490	2,734
Supplemental disclosure of cash flow information:
Cash paid for income taxes	16	10	7
Cash paid for interest	$ 22	$ 6	$ 8
Supplemental disclosure of non-cash financing activities:
Common stock issued in connection with acquisition	877

Consolidated Statements of Shareholders' Equity and Comprehensive Income (USD $) In Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Total Comprehensive Income
Beginning Balance at Jul. 03, 2009	$ 3,192	$ 2		$ 896	$ 2	$ 2,292	$ 484
Beginning balance, shares at Jul. 03, 2009		225
Employee stock plans	62			62
Employee stock plans, shares		6
Stock based compensation	60			60
Increase in excess tax benefits from employee stock plans	4			4
Net income	1,382					1,382	1,382
Unrealized gain/loss on foreign exchange contracts	9				9		9
Ending Balance at Jul. 02, 2010	4,709	2		1,022	11	3,674	1,391
Ending balance, Shares at Jul. 02, 2010		231
Employee stock plans	50		50
Employee stock plans, shares		2	2
Stock based compensation	69			69
Repurchase of common stock	(50)		(50)
Repurchase of common stock, shares			(2.0)
Net income	726					726	726
Unrealized gain/loss on foreign exchange contracts	(16)				(16)		(16)
Ending Balance at Jul. 01, 2011	5,488	2		1,091	(5)	4,400	710
Ending balance, Shares at Jul. 01, 2011		233
Employee stock plans	59		50	9
Employee stock plans, shares		3	1
Stock based compensation	92			92
Common stock issued in connection with acquisition	877	1		876
Common stock issued in connection with acquisition, shares		25
Stock awards assumed in acquisition	73			73
Increase in excess tax benefits from employee stock plans	82			82
Repurchase of common stock	(604)		(604)
Repurchase of common stock, shares	(16.4)		(16.0)
Net income	1,612					1,612	1,612
Actuarial pension loss	(3)				(3)		(3)
Translation gain	4				4		4
Unrealized gain/loss on foreign exchange contracts	(11)				(11)		(11)
Ending Balance at Jun. 29, 2012	$ 7,669	$ 3	$ (554)	$ 2,223	$ (15)	$ 6,012	$ 1,602
Ending balance, Shares at Jun. 29, 2012		261	(15)

Organization and Summary of Significant Accounting Policies

12 Months Ended

Jun. 29, 2012

Organization and Summary of Significant Accounting Policies and Supplemental Financial Statement Data [Abstract]

Organization and Summary of Significant Accounting Policies

Note 1. Organization and Summary of Significant Accounting Policies

Western Digital Corporation (the “Company” or “Western Digital”) is an industry-leading developer and manufacturer of storage products that enable people to create, manage, experience and preserve digital content. The Company designs and makes storage devices, networking equipment and home entertainment products under the WD, HGST and G-Technology brands. The Company serves each of the primary markets addressing storage opportunities — enterprise and cloud data centers, client, consumer electronics, backup, the internet and other emerging markets such as automotive and home and small office networking.

The Company operates its global business through two independent subsidiaries due to regulatory requirements—WD and HGST, both long-time innovators in the storage industry.

The Company’s principal products today are hard drives that use one or more rotating magnetic disks (“magnetic media”) to store and allow fast access to data. Hard drives are today’s primary storage medium for digital content. The Company’s hard drives are used in desktop and notebook computers, corporate and multiple types of data centers, home entertainment equipment and stand-alone consumer storage devices. The Company’s other products include solid-state drives, home entertainment and networking products and software applications for smart phones and tablets.

The Company has prepared its consolidated financial statements in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and has adopted accounting policies and practices which are generally accepted in the industry in which it operates. The Company’s significant accounting policies are summarized below.

Fiscal Year

The Company has a 52 or 53-week fiscal year. The 2012, 2011 and 2010 fiscal years which ended on June 29, 2012, July 1, 2011 and July 2, 2010, respectively, consisted of 52 weeks each.

Basis of Presentation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The accounts for all foreign subsidiaries, except for one Japanese subsidiary in which Yen is the functional currency, have been remeasured using the U.S. dollar as the functional currency. Gains or losses resulting from remeasurement or translation of these accounts from local currencies into U.S. dollars were immaterial to the consolidated financial statements.

On March 8, 2012 (“Closing Date”), the Company completed its acquisition (“the Acquisition”) of all of the issued and paid-up share capital of Viviti Technologies Ltd., until recently known as Hitachi Global Storage Technologies Holdings Pte. Ltd. (“HGST”) from Hitachi, Ltd. (“Hitachi”). On June 30, 2010, the Company acquired the magnetic media sputtering operations of Hoya Corporation and Hoya Magnetics Singapore Pte. Ltd (together, “Hoya”). The acquisitions are further described in Note 14. The results of operations of HGST and Hoya since the dates of their acquisitions are included in the consolidated financial statements.

Cash and Cash Equivalents

The Company’s cash equivalents represent highly liquid investments in money market funds, which are invested in U.S. Treasury securities, U.S. Treasury bills and U.S. Government agency securities with original maturities when purchased of three months or less.

Investments

The Company’s investments consist of auction-rate securities, which are primarily backed by insurance products with original maturities greater than three months. The Company has classified these investments as available-for-sale securities and they are carried at fair value within other non-current assets in the consolidated balance sheets.

Fair Value of Financial Instruments

The carrying amounts of cash equivalents, accounts receivable, investments, accounts payable and accrued expenses approximate fair value for all periods presented because of the short-term maturity of these assets and liabilities or, in the case of investments, these are recorded using appropriate market information. The carrying amount of debt approximates fair value because of its variable interest rate.

Concentration of Credit Risk

The Company sells its products to computer manufacturers, resellers and retailers throughout the world. The Company performs ongoing credit evaluations of its customers’ financial condition and generally requires no collateral. The Company maintains allowances for potential credit losses, and such losses have historically been within management’s expectations. At any given point in time, the total amount outstanding from any one of a number of its customers may be individually significant to the Company’s financial results. At June 29, 2012 and July 1, 2011, the Company had reserves for potential credit losses of $9 million and $5 million, respectively, and net accounts receivable of $2.4 billion and $1.2 billion, respectively.

The Company also has cash equivalent and investment policies that limit the amount of credit exposure to any one financial institution or investment instrument and requires that investments be made only with financial institutions or in investment instruments evaluated as highly credit-worthy.

Inventories

The Company values inventories at the lower of cost (first-in, first out and weighted average methods) or net realizable value. The first-in, first-out (“FIFO”) method is used to value the cost of the majority of the Company’s inventories, while the weighted-average method is used to value precious metal inventories. Weighted-average cost is calculated based upon the cost of precious metals at the time they are received by the Company. The Company has determined that it is not practicable to assign specific costs to individual units of precious metals and, as such, precious metals are relieved from inventory based on the weighted-average cost of the inventory at the time the inventory is used in production. The weighted average method of valuing precious metals does not materially differ from a FIFO method. As of June 29, 2012 and July 1, 2011, 89% and 85%, respectively, of the inventory was valued using the FIFO method with the remainder valued using the weighted average method. Inventory write-downs are recorded for the valuation of inventory at the lower of cost or net realizable value by analyzing market conditions and estimates of future sales prices as compared to inventory costs and inventory balances.

The Company evaluates inventory balances for excess quantities and obsolescence on a regular basis by analyzing estimated demand, inventory on hand, sales levels and other information, and reduces inventory balances to net realizable value for excess and obsolete inventory based on this analysis. Unanticipated changes in technology or customer demand could result in a decrease in demand for one or more of the Company’s products, which may require a write down of inventory that could materially affect operating results.

Property, Plant and Equipment

The cost of property, plant and equipment is depreciated over the estimated useful lives of the respective assets. The Company’s buildings are depreciated over periods ranging from fifteen to thirty years. The majority of the Company’s equipment is depreciated over periods of three to seven years. Depreciation is computed on a straight-line basis. Leasehold improvements are amortized over the lesser of the estimated useful lives of the assets or the related lease terms.

Goodwill and Other Long-Lived Assets

The fair value of assets acquired and liabilities assumed in a business acquisition are recognized at the acquisition date, with amounts exceeding the fair values being recognized as goodwill. Goodwill is not amortized. Instead, it is tested for impairment on an annual basis or more frequently whenever events or changes in circumstances indicate that goodwill may be impaired. The Company did not record any impairment of goodwill during 2012, 2011 or 2010.

Other intangible assets consist primarily of technology acquired in business combinations. Acquired intangibles are amortized on a straight-line basis over their respective estimated useful lives. Long-lived assets are tested for recoverability whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. The Company recorded impairments to certain long-lived assets in 2012. See Notes 15 and 16. The Company did not record any impairments to long-lived assets during 2011 or 2010.

Revenue and Accounts Receivable

Revenue is recognized when the title and risk of loss have passed to the customer, there is persuasive evidence of an arrangement, delivery has occurred, or services have been rendered, the sales price is fixed or determinable and collectability is reasonably assured. The Company establishes provisions against revenue and cost of revenue for estimated sales returns in the same period that the related revenue is recognized based on existing product return notifications. If actual sales returns exceed expectations, an increase in the sales return accrual would be required, which could materially affect operating results.

In accordance with standard industry practice, the Company provides distributors and retailers (collectively referred to as “resellers”) with limited price protection for inventories held by resellers at the time of published list price reductions, and the Company provides resellers and OEMs with other sales incentive programs. At the time the Company recognizes revenue to resellers and OEMs, a reduction of revenue is recorded for estimated price protection until the resellers sell such inventory to their customers and the Company also records a reduction of revenue for the other programs in effect. The Company bases these adjustments on several factors including anticipated price decreases during the reseller holding period, reseller’s sell-through and inventory levels, estimated amounts to be reimbursed to qualifying customers, historical pricing information and customer claim processing. If customer demand for hard drives or market conditions differ from the Company’s expectations, the Company’s operating results could be materially affected. The Company also has programs under which it reimburses qualified distributors and retailers for certain marketing expenditures, which are recorded as a reduction of revenue. Sales incentive and marketing programs are recorded as a reduction of revenue.

The Company records an allowance for doubtful accounts by analyzing specific customer accounts and assessing the risk of loss based on insolvency, disputes or other collection issues. In addition, the Company routinely analyzes the different receivable aging categories and establishes reserves based on a combination of past due receivables and expected future losses based primarily on its historical levels of bad debt losses. If the financial condition of a significant customer deteriorates resulting in its inability to pay its accounts when due, or if the Company’s overall loss history changes significantly, an adjustment in the Company’s allowance for doubtful accounts would be required, which could materially affect operating results.

The Company establishes provisions against revenue and cost of revenue for sales returns in the same period that the related revenue is recognized. These provisions are based on existing product return notifications. If actual sales returns exceed expectations, an increase in the sales return accrual would be required, which could materially affect operating results.

Warranty

The Company records an accrual for estimated warranty costs when revenue is recognized. The Company generally warrants its products for a period of one to five years. The warranty provision considers estimated product failure rates and trends, estimated repair or replacement costs and estimated costs for customer compensatory claims related to product quality issues, if any. A statistical warranty tracking model is used to help prepare estimates and assist the Company in exercising judgment in determining the underlying estimates. The statistical tracking model captures specific detail on hard drive reliability, such as factory test data, historical field return rates, and costs to repair by product type. Management’s judgment is subject to a greater degree of subjectivity with respect to newly introduced products because of limited field experience with those products upon which to base warranty estimates. Management reviews the warranty accrual quarterly for products shipped in prior periods and which are still under warranty. Any changes in the estimates underlying the accrual may result in adjustments that impact current period gross margin and income. Such changes are generally a result of differences between forecasted and actual return rate experience and costs to repair. If actual product return trends, costs to repair returned products or costs of customer compensatory claims differ significantly from estimates, future results of operations could be materially affected.

Litigation and Other Contingencies

When the Company becomes aware of a claim or potential claim, the Company assesses the likelihood of any loss or exposure. The Company discloses information regarding each material claim where the likelihood of a loss contingency is probable or reasonably possible. If a loss contingency is probable and the amount of the loss can be reasonably estimated, the Company records an accrual for the loss. In such cases, there may be an exposure to potential loss in excess of the amount accrued. Where a loss is not probable but is reasonably possible or where a loss in excess of the amount accrued is reasonably possible, the Company discloses an estimate of the amount of the loss or range of possible losses for the claim if a reasonable estimate can be made, unless the amount of such reasonably possible losses is not material to the Company’s financial position, results of operations or cash flows. The ability to predict the ultimate outcome of such matters involves judgments, estimates and inherent uncertainties. The actual outcome of such matters could differ materially from management’s estimates. See Note 5.

Advertising Expense

Advertising costs are expensed as incurred. Selling, general and administrative expenses of the Company included advertising costs of $30 million, $11 million, and $7 million in 2012, 2011 and 2010, respectively.

Income Taxes

The Company accounts for income taxes under the asset and liability method, which provides that deferred tax assets and liabilities be recognized for temporary differences between the financial reporting basis and the tax basis of assets and liabilities and expected benefits of utilizing net operating loss (“NOL”) and tax credit carryforwards. The Company records a valuation allowance when it is more likely than not that the deferred tax assets will not be realized. Each period, the Company evaluates the need for a valuation allowance for its deferred tax assets and adjusts the valuation allowance so that the Company records net deferred tax assets only to the extent that it has concluded it is more likely than not that these deferred tax assets will be realized.

The Company recognizes liabilities for uncertain tax positions based on a two-step process. To the extent a tax position does not meet a more-likely-than-not level of certainty, no benefit is recognized in the financial statements. If a position meets the more-likely-than-not level of certainty, it is recognized in the financial statements at the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. Interest and penalties related to unrecognized tax benefits are recognized on liabilities recorded for uncertain tax positions and are recorded in the provision for income taxes. The actual liability for unrealized tax benefits may be materially different from the Company’s estimates, which could result in the need to record additional liabilities for unrecognized tax benefits or potentially adjust previously-recorded liabilities for unrealized tax benefits, and may materially affect our operating results.

Income per Common Share

The Company computes basic income per common share using net income and the weighted average number of common shares outstanding during the period. Diluted income per common share is computed using net income and the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares include certain dilutive outstanding employee stock options, rights to purchase shares of common stock under the Company’s Employee Stock Purchase Plan (“ESPP”) and restricted stock unit awards.

The following table illustrates the computation of basic and diluted income per common share (in millions, except per share data):


	Years Ended
	June 29, 2012		July 1, 2011		July 2, 2010
Net income	$	1,612	$	726	$	1,382

Weighted average shares outstanding:
Basic		241		231		228
Employee stock options and other		4		4		5

Diluted		245		235		233

Income per common share:
Basic	$	6.69	$	3.14	$	6.06

Diluted	$	6.58	$	3.09	$	5.93

Anti-dilutive potential common shares excluded*		5		3		1

*	For purposes of computing diluted income per common share, certain potentially dilutive securities have been excluded from the calculation because their effect would have been anti-dilutive.

Stock-based Compensation

The Company accounts for all stock-based compensation at fair value. Stock-based compensation cost is measured at the grant date based on the value of the award and is recognized as expense over the vesting period. The fair values of all stock options and cash-settled stock appreciation rights (“SARs”) granted are estimated using a binomial model, and the fair values of all ESPP purchase rights are estimated using the Black-Scholes-Merton option-pricing model. The Company accounts for SARs as liability awards based upon management’s intention to settle such awards in cash. The SARs liability is recognized for that portion of fair value for the service period rendered at the reporting date. The share-based liability is remeasured at each reporting date through the requisite service period. Both the binomial and the Black-Scholes-Merton option-pricing models require the input of highly subjective assumptions. The Company is required to use judgment in estimating the amount of stock-based awards that are expected to be forfeited. If actual forfeitures differ significantly from the original estimate, stock-based compensation expense and the results of operations could be materially affected.

Other Comprehensive Income (Loss)

Other comprehensive income (loss) refers to revenue, expenses, gains and losses that are recorded as an element of shareholders’ equity but are excluded from net income. The Company’s other comprehensive income (loss) is comprised of unrealized gains and losses on foreign exchange contracts, actuarial gains and losses related to pensions and gains and losses on foreign currency translation adjustments.

Foreign Exchange Contracts

Although the majority of the Company’s transactions are in U.S. dollars, some transactions are based in various foreign currencies. The Company purchases short-term, foreign exchange contracts to hedge the impact of foreign currency exchange fluctuations on certain underlying assets, revenue, liabilities and commitments for operating expenses and product costs denominated in foreign currencies. The purpose of entering into these hedging transactions is to minimize the impact of foreign currency fluctuations on the Company’s results of operations. These contract maturity dates do not exceed 12 months. All foreign exchange contracts are for risk management purposes only. The Company does not purchase foreign exchange contracts for trading purposes. The Company had outstanding foreign exchange contracts with commercial banks for British Pound Sterling, Euro, Japanese Yen, Malaysian Ringgit, Philippine Peso, Singapore Dollar and Thai Baht, which were designated as either cash flow or fair value hedges and had an aggregate notional amount of $1.6 billion and $1.5 billion at June 29, 2012 and July 1, 2011, respectively.

If the derivative is designated as a cash flow hedge, the effective portion of the change in fair value of the derivative is initially deferred in other comprehensive income (loss), net of tax. These amounts are subsequently recognized into earnings when the underlying cash flow being hedged is recognized into earnings. Recognized gains and losses on foreign exchange contracts entered into for manufacturing-related activities are reported in cost of revenue. Hedge effectiveness is measured by comparing the hedging instrument’s cumulative change in fair value from inception to maturity to the underlying exposure’s terminal value. The Company determined the ineffectiveness associated with its cash flow hedges to be immaterial.

A change in the fair value of fair value hedges is recognized in earnings in the period incurred. For our Japanese subsidiary in which Yen is the functional currency, a change in the fair value of fair value hedges is recognized in other comprehensive income (loss) in the period incurred. All fair value hedges were determined to be effective. The fair value and the changes in fair value on these contracts were not material to the consolidated financial statements for all years presented. See Notes 10 and 11 for additional disclosures related to foreign exchange contracts.

Pensions and Other Postretirement Benefit Plans

The Company has defined benefit pension plans and other postretirement plans covering certain employees in various countries. The benefits are based on the employees’ years of service and compensation. The plans are funded in conformity with the funding requirements of applicable government authorities. The Company amortizes unrecognized actuarial gains and losses and prior service costs on a straight-line basis over the remaining estimated average service life of the participants. The measurement date for the plans is the Company’s fiscal year-end. The Company recognizes the funded status of its defined benefit pension and postretirement plans in the consolidated balance sheets, with changes in the funded status recognized through accumulated other comprehensive income (loss) in the year in which such changes occur. See Note 14 for additional disclosures related to the Company’s pension and other postretirement benefit plans.

Use of Estimates

Company management has made estimates and assumptions relating to the reporting of certain assets and liabilities in conformity with U.S. GAAP. These estimates and assumptions have been applied using methodologies that are consistent throughout the periods presented. However, actual results could differ materially from these estimates.

Recent Accounting Pronouncements

In June 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-05 “Presentation of Comprehensive Income” (“ASU 2011-05”). The new standard requires that all non-owner changes in shareholders’ equity be presented either in a single continuous statement of comprehensive income or in two separate but continuous statements. If presented in two separate statements, the first statement should present total net income and its components followed immediately by a second statement of total other comprehensive income, its components and the total comprehensive income. In December 2011, the FASB deferred certain changes in ASU 2011-05 that relate to the presentation of reclassification adjustments. The new standard is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2011, which for the Company is the first quarter of fiscal 2013. The Company is currently evaluating how it will report comprehensive income, but the adoption of either method will constitute a change in the Company’s financial statement presentation.

Organization and Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Computation of basic and diluted income per common share
Net income	$ 745	$ 483	$ 145	$ 239	$ 158	$ 146	$ 225	$ 197	$ 1,612	$ 726	$ 1,382
Weighted average shares outstanding:
Basic									241	231	228
Employee stock options and other									4	4	5
Diluted									245	235	233
Income per common share:
Basic	$ 2.93	$ 2.00	$ 0.62	$ 1.03	$ 0.68	$ 0.63	$ 0.98	$ 0.86	$ 6.69	$ 3.14	$ 6.06
Diluted	$ 2.87	$ 1.96	$ 0.61	$ 1.01	$ 0.67	$ 0.62	$ 0.96	$ 0.84	$ 6.58	$ 3.09	$ 5.93
Anti-dilutive potential common shares excluded									5	3	1

Supplemental Financial Statement Data (Details) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Inventories:
Raw materials and component parts	$ 245	$ 172
Work-in-process	552	263
Finished goods	413	142
Total inventories	$ 1,210	$ 577

Supplemental Financial Statement Data (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Property, Plant and Equipment, Net
Total property, plant and equipment	$ 7,173	$ 4,837
Accumulated depreciation	(3,106)	(2,613)
Property, plant and equipment, net	4,067	2,224
Land and Building [Member]
Property, Plant and Equipment, Net
Total property, plant and equipment	1,222	741
Machinery and Equipment [Member]
Property, Plant and Equipment, Net
Total property, plant and equipment	5,211	3,664
Furniture and Fixtures [Member]
Property, Plant and Equipment, Net
Total property, plant and equipment	15	9
Leasehold Improvements [Member]
Property, Plant and Equipment, Net
Total property, plant and equipment	128	108
Construction-in-process [Member]
Property, Plant and Equipment, Net
Total property, plant and equipment	$ 597	$ 315

Debt (Details) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Long-term debt
Term loan	$ 2,185	$ 294
Less amounts due in one year	(230)	(144)
Long-term debt	$ 1,955	$ 150

Debt (Details Textual) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended		3 Months Ended		12 Months Ended
	Jun. 29, 2012	Mar. 08, 2012	Jul. 01, 2011 Hitachi Global Storage Technologies [Member]	Mar. 08, 2012 Hitachi Global Storage Technologies [Member]	Jun. 29, 2012 Maximum [Member]	Jun. 29, 2012 Minimum [Member]	Jun. 29, 2012 Term Loan [Member]	Mar. 08, 2012 Term Loan [Member]	Mar. 08, 2012 Revolving Credit Facility [Member]
Debt (Textual) [Abstract]
Total unsecured loan under credit facility									$ 500,000,000
Total unsecured loan under credit facility		2,800,000,000
Total unsecured loan under credit facility								2,300,000,000
Applicable margin for borrowings under credit facility for borrowings at Eurodollar Rate					2.50%	1.50%
Applicable margin for borrowings under credit facility for borrowings at Base Rate					1.50%	0.50%
Rate for facility fee due on revolving credit facility					0.50%	0.25%
2013							230,000,000
2014							230,000,000
2015							230,000,000
2016							230,000,000
Remaining balance term loan facility there after							1,300,000,000
Maturity date of remaining term loan facility							Mar. 08, 2017
Assumed debt from acquisition				585,000,000
Debt (Additional Textual) [Abstract]
Sublimit for Swing Line Loans Under Revolving Credit Facility	20,000,000
Sublimit for letters of credit under revolving credit facility	50,000,000
Newly issued share to fund acquisition	25
Period of term loan facility	5 years
Line Of Credit Facility Additional Borrowing Capacity	500,000,000
Interest rate in Addition to federal funds rate under sub condition 1 of condition 2	0.50%
Interest rate in addition to Eurodollar Rate under sub condition 3 of condition 2	1.00%
Interest rate of borrowing under credit facility	2.25%
Letter of credit fees condition 2	0.125%
Line of Credit Facility, Commitment Fee Percentage	0.35%
Amount of commitment fee	7,000,000		2,000,000
Repayment of Outstanding existing term loan facility	$ 231,000,000

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012
Future minimum lease payments under operating leases
2013	$ 48
2014	33
2015	27
2016	18
2017	11
Thereafter	55
Total future minimum payments	$ 192

Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Jan. 23, 2012	Nov. 18, 2011
Legal Proceedings (Textual) [Abstract]
Issued interim award against losses			$ 525
Statutory rate specified as pre-award interest rate	10.00%
Amount of final award adding pre-award interest issued by the arbitrator		105.4
Amount of total award issued by the arbitrator		630.4
Amount of Accrued liability for the arbitrator award previously	25
Maximum amount of losses related to vacate the award or to overturn the award	605.4
Minimum amount of losses related to vacate the award or to overturn the award	$ 0
Statutory rate specified as additional interest rate	10.00%

Shareholders' Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 29, 2012 Y	Jul. 01, 2011	Jul. 02, 2010
Stock Option Activity
Option outstanding, Beginning Balance, Number of Shares	10.2	9.4	11.3
Options outstanding, Beginning Balance, Weighted Average Exercise Price	$ 22.49	$ 20.61	$ 17.00
Granted, Number of Shares	3.7	2.5	1.4
Granted, Weighted Average Exercise Price Per Share	$ 31.78	$ 26.59	$ 36.06
Exercised, Number of Shares	(2.1)	(1.4)	(3.1)
Exercised, Weighted Average Exercise Price Per Share	$ 15.14	$ 16.83	$ 14.67
Cancelled or expired, Number of Shares	(0.2)	(0.3)	(0.2)
Cancelled or expired, Weighted Average Exercise Price Per Share	$ 28.76	$ 26.21	$ 22.78
Assumed, Number of Shares	4.2
Assumed, Weighted Average Exercise Price Per Share	$ 8.47
Options outstanding, Ending Balance, Numbers of Shares	15.8	10.2	9.4
Options outstanding, Ending Balance, Weighted Average Exercise Price	$ 21.89	$ 22.49	$ 20.61
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	4.5
Options Outstanding, Aggregate Intrinsic Value	$ 150
Exercisable at June 29, 2012, Number of Shares	7.1
Exercisable at June 29, 2012, Weighted Average Exercise Price Per Share	$ 20.55
Exercisable at June 29, 2012, Weighted Average Remaining Contractual Life	3.5
Exercisable at June 29, 2012, Aggregate Intrinsic Value	75
Vested and expected to vest after June 29, 2012, Number of Shares	15.6
Vested and expected to vest after June 29, 2012, Weighted Average Exercise Price Per Share	$ 21.84
Vested and expected to vest after June 29, 2012, Weighted Average Remaining Contractual Life (in years)	4.5
Vested and expected to vest after June 29, 2012, Aggregate Intrinsic Value	$ 149

Shareholders' Equity (Details 1) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 29, 2012
Options outstanding and exercisable under the stock plans
Options outstanding, Number of shares	15.8
Options outstanding, Weighted average remaining contractual life	4 years 6 months
Options outstanding, Weighted average exercise price	$ 21.89
Options exercisable, Number of shares	7.1
Options exercisable, Weighted average exercise price	$ 20.55
Range One [Member]
Options outstanding and exercisable under the stock plans
Range of Exercise Prices Lower limit	$ 3.85
Range of Exercise Prices Upper limit	$ 6.67
Options outstanding, Number of shares	2.8
Options outstanding, Weighted average remaining contractual life	4 years 3 months 18 days
Options outstanding, Weighted average exercise price	$ 6.47
Options exercisable, Number of shares	0.7
Options exercisable, Weighted average exercise price	$ 5.92
Range Two [Member]
Options outstanding and exercisable under the stock plans
Range of Exercise Prices Lower limit	$ 7.48
Range of Exercise Prices Upper limit	$ 19.90
Options outstanding, Number of shares	3.5
Options outstanding, Weighted average remaining contractual life	3 years 6 months
Options outstanding, Weighted average exercise price	$ 14.48
Options exercisable, Number of shares	2.6
Options exercisable, Weighted average exercise price	$ 14.86
Range Three [Member]
Options outstanding and exercisable under the stock plans
Range of Exercise Prices Lower limit	$ 20.13
Range of Exercise Prices Upper limit	$ 26.01
Options outstanding, Number of shares	2.4
Options outstanding, Weighted average remaining contractual life	3 years 7 months 6 days
Options outstanding, Weighted average exercise price	$ 23.92
Options exercisable, Number of shares	1.9
Options exercisable, Weighted average exercise price	$ 23.64
Range Four [Member]
Options outstanding and exercisable under the stock plans
Range of Exercise Prices Lower limit	$ 26.17
Range of Exercise Prices Upper limit	$ 35.74
Options outstanding, Number of shares	5.0
Options outstanding, Weighted average remaining contractual life	5 years 6 months
Options outstanding, Weighted average exercise price	$ 28.30
Options exercisable, Number of shares	1.2
Options exercisable, Weighted average exercise price	$ 27.18
Range Five [Member]
Options outstanding and exercisable under the stock plans
Range of Exercise Prices Lower limit	$ 35.75
Range of Exercise Prices Upper limit	$ 40.66
Options outstanding, Number of shares	2.1
Options outstanding, Weighted average remaining contractual life	5 years 4 months 24 days
Options outstanding, Weighted average exercise price	$ 37.22
Options exercisable, Number of shares	0.7
Options exercisable, Weighted average exercise price	$ 36.13

Shareholders' Equity (Details 2) (USD $)	12 Months Ended
Shareholders' Equity (Details 2) (USD $)	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Fair value of stock options granted
Suboptimal exercise factor	1.81	1.81	1.73
Risk-free interest rates, minimum	0.12%	0.20%	0.31%
Risk-free interest rates, maximum	1.61%	2.90%	3.40%
Expected stock price volatility, minimum	0.41%	0.39%	0.40%
Expected stock price volatility, maximum	0.55%	0.59%	0.72%
Weighted average expected volatility	0.49%	0.52%	0.57%
Post-vesting termination rate	2.61%	2.44%	3.57%
Dividend yield
Fair value	$ 12.91	$ 11.42	$ 17.09

Shareholders' Equity (Details 3) (USD $)	12 Months Ended
Shareholders' Equity (Details 3) (USD $)	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Employee stock purchase plan
Option life (in years)	4 years 10 months 24 days	4 years 8 months 12 days	4 years 7 months 6 days
Dividend yield
Fair value	$ 12.91	$ 11.42	$ 17.09
Employee Stock [Member]
Employee stock purchase plan
Option life (in years)	1 year 2 months 27 days	1 year 3 months	1 year 2 months 27 days
Risk-free interest rate	0.22%	0.44%	0.57%
Stock price volatility	0.46%	0.44%	0.53%
Dividend yield
Fair value	$ 7.29	$ 8.36	$ 10.02

Shareholders' Equity (Details 5) In Millions, unless otherwise specified	Jun. 29, 2012
Maximum shares issuable in connection with
Share of common stock reserve for issuance	27.7
Outstanding awards and shares available for award [Member]
Maximum shares issuable in connection with
Share of common stock reserve for issuance	25.7
Employee Stock [Member]
Maximum shares issuable in connection with
Share of common stock reserve for issuance	2.0

Shareholders Equity (Details Textual) (USD $)	3 Months Ended	12 Months Ended			96 Months Ended	12 Months Ended								12 Months Ended
Shareholders Equity (Details Textual) (USD $)	Mar. 30, 2012	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010	Jun. 29, 2012	Jun. 29, 2012 Maximum [Member]	Jun. 29, 2012 Minimum [Member]	Jun. 29, 2012 Restricted Stock Units (RSUs) [Member]	Jul. 01, 2011 Restricted Stock Units (RSUs) [Member]	Jul. 02, 2010 Restricted Stock Units (RSUs) [Member]	Jun. 29, 2012 Stock Repurchase Program [Member]	May 21, 2012 Stock Repurchase Program [Member]	Jun. 29, 2012 Stock Appreciation Rights (SARs) [Member]	Jun. 29, 2012 Performance Shares [Member]
Shareholders Equity (Textual) [Abstract]
Total compensation cost related to unvested stock SARs issued to employees													$ 18,000,000
Restricted stock, Number of share granted								1,400,000	1,000,000	1,200,000				200,000
Share Based payment award equity instruments other than options aggregate market value								71,000,000
Authorized number of share of common stock for awards grant under performance incentive plan		37,200,000			37,200,000
Authorized amount of shares											750,000,000
Additional common stock authorized for repurchase												1,500,000,000
Common shares utilized		188,000,000			188,000,000						750,000,000
Number of assumed SARs outstanding		1,700,000			1,700,000								1,700,000
Companies common stock						200.00%	0.00%
Assumed outstanding, Number of shares								3,500,000
Shareholders' Equity (Additional Textual) [Abstract]
Common stock remain outstanding and exercisable under prior stock plan option for purchase		800,000			800,000
Share issued in respect of any other type of award granted under the plan		1.35			1.35
Number of restricted stock units assumed in acquisition outstanding at balance sheet date		200,000
Restricted stock, Number of share assumed								400,000
Eligible Employee Payroll Deduction Amount for Employee Stock Purchase Plan		Up to 10%
Percentage of market value for purchases with in employee stock purchase plan		at 95%			at 95%
Employee stock purchase plan offering period		24 months
Expense on stock based compensation		57,000,000	37,000,000	37,000,000
Total compensation cost related to unvested stock options and ESPP rights issued		143,000,000			143,000,000
Weighted average service period		2 years 3 months 18 days
Benefit to earnings for stock appreciation rights decrease in value		7,000,000
Total liability related to SARs		22,000,000			22,000,000
Total compensation cost, weighted average service period		1 year 9 months 18 days
Forfeiture rate of restricted stock unit valuation assumption		2.40%	1.80%	1.60%
Expense related to the vesting of restricted stock unit awards		35,000,000	32,000,000	23,000,000
Unamortized fair value of all unvested restricted stock unit awards		56,000,000			56,000,000
Weighted average vesting period	1 year 7 months 6 days
Options outstanding to purchase shares with exercise price below company stock price		15,800,000			15,800,000
Options outstanding to purchase shares with exercise price below company stock price, intrinsic value		150,000,000			150,000,000
Aggregate intrinsic value of options exercised under the Company's stock option plan		53,000,000	25,000,000	72,000,000
Stock Appreciation Right Outstanding, Weighted Average Exercise Price		$ 7.67			$ 7.67
Weighted average expected term of the Company's stock options		4 years 10 months 24 days	4 years 8 months 12 days	4 years 7 months 6 days
Aggregate value of restricted stock awards vested		41,000,000	23,000,000
Grant-date fair value of shares underlying restricted stock awards.		71,000,000	26,000,000	45,000,000
Company repurchased shares of its common stock		16,400,000			36,000,000
Repurchase of common stock		$ 604,000,000	$ 50,000,000		$ 938,000,000

Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Deferred tax assets:
Sales related reserves and accrued expenses not currently deductible	$ 61	$ 51
Accrued compensation and benefits not currently deductible	166	69
Domestic net operating loss carryforward	112	49
Business credit carryforward	154	145
Other	90	53
Total deferred tax assets	583	367
Deferred tax liabilities:
Depreciation	(191)	(116)
Other	(18)	(10)
Total deferred tax liabilities	(209)	(126)
Valuation allowances (included in non-current portion of deferred tax assets)	(40)
Deferred tax assets, net	334	241
Deferred tax assets:
Current portion (included in other current assets)	159	108
Non-current portion (included in other non-current assets)	424	259
Total deferred tax assets	583	367
Deferred tax liabilities:
Current portion (included in other current assets)	(3)	(2)
Non-current portion (included in other non-current assets)	(206)	(124)
Total deferred tax liabilities	(209)	(126)
Valuation allowances (included in non-current portion of deferred tax assets)	(40)
Deferred tax assets, net	$ 334	$ 241

Income Taxes (Details 3)	12 Months Ended
Income Taxes (Details 3)	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Effective Tax Rate
U.S. Federal statutory rate	35.00%	35.00%	35.00%
Tax rate differential on international income	(29.00%)	(26.00%)	(26.00%)
Tax effect of U.S. permanent differences	3.00%	3.00%	1.00%
State income tax, net of federal tax	1.00%	(1.00%)
Income tax credits	(2.00%)	(4.00%)	(1.00%)
Effective tax rate	8.00%	7.00%	9.00%

Income Taxes (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012
Uncertain Tax Positions
Unrecognized tax benefit at July 1, 2011	$ 245
Gross increases related to current year tax positions	14
Settlements/lapse of statute of limitations	(18)
HGST acquisition	39
Unrecognized tax benefit at June 29, 2012	$ 280

Income Taxes (Details Textual) (USD $)	12 Months Ended
Income Taxes (Details Textual) (USD $)	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Income Taxes (Textual) [Abstract]
Net undistributed earning from foreign subsidiaries	$ 6,300,000,000
Tax liability for undistributed earnings	2,100,000,000
Net deferred tax asset valuation	40,000,000
Net operating benefits related to stock-based compensation deductions	33,000,000	110,000,000
Net operating loss benefits relates to the current year and prior year stock based compensation deductions which resulted in a current benefit	82,000,000
Tax holidays and incentives increase net earnings	729,000,000	362,000,000	560,000,000
Tax holidays and incentives increase net earnings, shares	$ 2.98	$ 1.54	$ 2.40
Federal net operating loss carryforward	240,000,000
State net operating loss carryforwards	151,000,000
Federal and state tax credit carryforwards	236,000,000
Credit carryforwards available to offset future taxable income	108,000,000
Expiration date of tax holiday in Malaysia, the Philippines, Singapore and Thailand	Through 2025
Amount of benefit that may be recognized for uncertain tax positions	largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement
Unrecognized tax benefits	280,000,000	245,000,000
NOL carryforward available to offset future federal taxable income expiration period	From 2020 to 2032
NOL carryforward available to offset future state taxable income expiration period	From 2016 to 2032
Reduction in ultimately realized amount of credits	9,000,000
Western Digital Corporation [Member]
Income Tax Examination [Line Items]
Estimated impact of proposed IRS adjustments on Pre-tax income	$ 970,000,000

Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Assets:
Total cash equivalents	$ 844	$ 859
Total assets at fair value	859	874
Liabilities:
Total liabilities at fair value	22	5
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents	721	721
Total assets at fair value	721	721
Liabilities:
Total liabilities at fair value
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	123	138
Total assets at fair value	124	138
Liabilities:
Total liabilities at fair value	22	5
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents
Total assets at fair value	14	15
Liabilities:
Total liabilities at fair value
Foreign Exchange Contract [Member]
Assets:
Foreign exchange contracts	1
Liabilities:
Foreign exchange contracts	22	5
Foreign Exchange Contract [Member] \| Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Foreign exchange contracts
Liabilities:
Foreign exchange contracts
Foreign Exchange Contract [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Foreign exchange contracts	1
Liabilities:
Foreign exchange contracts	22	5
Foreign Exchange Contract [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Foreign exchange contracts
Liabilities:
Foreign exchange contracts
Money Market Funds [Member]
Assets:
Total cash equivalents	721	721
Money Market Funds [Member] \| Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents	721	721
Money Market Funds [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents
Money Market Funds [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents
US Treasury Securities [Member]
Assets:
Total cash equivalents	61	60
US Treasury Securities [Member] \| Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents
US Treasury Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	61	60
US Treasury Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents
U.S. Government agency securities [Member]
Assets:
Total cash equivalents	62	78
U.S. Government agency securities [Member] \| Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents
U.S. Government agency securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	62	78
U.S. Government agency securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents
Auction Rate Securities [Member]
Assets:
Auction-rate securities	14	15
Auction Rate Securities [Member] \| Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Auction-rate securities
Auction Rate Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Auction-rate securities
Auction Rate Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Auction-rate securities	$ 14	$ 15

Fair Value Measurements (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Fair Value Measurements (Textual) [Abstract]
Maturity of auction rate securities	Dates Through 2050
Financial assets measured on a recurring basis	$ 14	$ 15
Financial assets measured on a recurring basis settlement	$ 1

Foreign Exchange Contracts (Details) (Designated as Hedging Instrument [Member], Foreign Exchange Contract [Member], USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Jul. 01, 2011
Other Current Assets [Member]
Fair value and balance sheet location
Derivatives Designated as Hedging Instruments Fair value, Asset derivatives	$ 1
Accrued expenses [Member]
Fair value and balance sheet location
Derivatives Designated as Hedging Instruments Fair Value, Liability derivatives	$ 22	$ 5

Foreign Exchange Contracts (Details 1) (Foreign Exchange Contract [Member], Cash Flow Hedging [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Gains (Losses) of Derivatives in Cash Flow Hedging Relationships
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivatives	$ (12)	$ 77
Cost of revenue [Member]
Gains (Losses) of Derivatives in Cash Flow Hedging Relationships
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 1	$ 93

Foreign Exchange Contracts (Details Textual) (USD $)	12 Months Ended
Foreign Exchange Contracts (Details Textual) (USD $)	Jun. 29, 2012	Jul. 01, 2011
Foreign Exchange Contracts (Textual) [Abstract]
Unrealized losses expected to be reclassified into earnings	$ 16,000,000
Foreign exchange contracts opened during the period by company	3,200,000,000	4,700,000,000
Foreign exchange contracts closed during the period by company	$ 3,200,000,000	$ 3,200,000,000

Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Other Intangible Assets
Gross Carrying Amount	$ 933	$ 133
Accumulated Amortization	134	62
Net Carrying Amount	799	71
Existing technology [Member]
Other Intangible Assets
Weighted Average Amortization Period	5 years	9 years
Gross Carrying Amount	543	127
Accumulated Amortization	108	59
Net Carrying Amount	435	68
Customer relationships [Member]
Other Intangible Assets
Weighted Average Amortization Period	4 years
Gross Carrying Amount	139
Accumulated Amortization	14
Net Carrying Amount	125
Other [Member]
Other Intangible Assets
Weighted Average Amortization Period	3 years
Gross Carrying Amount	65
Accumulated Amortization	10
Net Carrying Amount	55
Leasehold Interests [Member]
Other Intangible Assets
Weighted Average Amortization Period	28 years
Gross Carrying Amount	43
Accumulated Amortization	2
Net Carrying Amount	41
In-process research and development [Member]
Other Intangible Assets
Gross Carrying Amount	143
Net Carrying Amount	143
Supply agreement [Member]
Other Intangible Assets
Weighted Average Amortization Period		2 years
Gross Carrying Amount		6
Accumulated Amortization		3
Net Carrying Amount		$ 3

Pensions and Other Post-retirement Benefit Plans (Details 1) (Japan Pension Benefits [Member], USD $) In Millions, unless otherwise specified	Jun. 29, 2012
Japan Pension Benefits [Member]
Unfunded amounts recognized on consolidate balance sheets
Current liabilities	$ (3)
Non-current liabilities	(116)
Net amount recognized	$ (119)

Pensions and Other Post-retirement Benefit Plans (Details 2) (Japan Pension Benefits [Member])	Jun. 29, 2012
Japan Pension Benefits [Member]
Weighted-average actuarial assumptions used to determine benefit obligations
Discount rate	1.80%
Rate of compensation increase	1.40%

Pensions and Other Post-retirement Benefit Plans (Details 3) (Japan Pension Costs [Member])	12 Months Ended
	Jun. 29, 2012
Japan Pension Costs [Member]
Weighted-average actuarial assumptions used to determine benefit costs
Discount rate	1.90%
Expected long-term rate of return on plan assets	3.50%
Rate of compensation increase	1.40%

Pensions and Other Post-retirement Benefit Plans (Details 4) (Japan Pension Benefits [Member], USD $) In Millions, unless otherwise specified	Jun. 29, 2012	Mar. 30, 2012
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	$ 167	$ 162
Level 1 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	13
Level 2 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	147
Level 3 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	7
Equity Securities [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	4
Equity commingled/mutual funds [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	45
Equity commingled/mutual funds [Member] \| Level 2 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	45
Government and related [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	13
Government and related [Member] \| Level 1 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	1
Government and related [Member] \| Level 2 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	12
Fixed income commingled/mutual funds [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	77
Fixed income commingled/mutual funds [Member] \| Level 2 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	77
Other securities [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	9
Other securities [Member] \| Level 2 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	9
Cash and short-term investments [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	12
Cash and short-term investments [Member] \| Level 1 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	8
Cash and short-term investments [Member] \| Level 2 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	4
Other [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	7
Other [Member] \| Level 3 [Member]
Japanese defined benefit pension plans' major asset categories and their associated fair values
Fair value of plan assets	$ 7

Pensions and Other Post-retirement Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012
Pensions and Other Pensions and Other Post-retirement Benefit Plans (Textual) [Abstract]
Accumulated benefit obligation for all defined benefit pension plans	$ 283
Net losses for defined benefit pension plans included in accumulated other comprehensive income at the balance sheet date	3
Assets held in defined benefit plans in the Philippines, Taiwan and Thailand	less than $1 million
Prior service credits for defined benefit pension plans included in accumulated other comprehensive income at the balance sheet date	less than $1 million
Defined benefit pension plan, estimated	5 years
Short term investments, maturities period	one year or less.
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan expected future benefit payments annual range	9
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan expected future benefit payments annual range	6
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation for securities, Minimum	22.00%
Target asset allocation for securities, Maximum	35.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation for securities, Minimum	46.00%
Target asset allocation for securities, Maximum	62.00%
Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation for securities, Minimum	3.00%
Target asset allocation for securities, Maximum	32.00%
Japan Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution for pension plan	$ 14

Acquisitions (Details) (Hitachi Global Storage Technologies [Member], USD $) In Millions, unless otherwise specified	Mar. 08, 2012
Hitachi Global Storage Technologies [Member]
Preliminary purchase price
Acquisition of all issued and outstanding paid-up share capital of HGST	$ 4,612
Fair value of stock options, restricted stock-based awards and SARs assumed	102
Total	$ 4,714

Acquisitions (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 2010	Jun. 29, 2012 Hitachi Global Storage Technologies [Member]	Mar. 08, 2012 Hitachi Global Storage Technologies [Member]
Tangible assets acquired and liabilities assumed:
Cash and cash equivalents			$ 194
Accounts receivable			1,290
Inventories	35	721	721
Other current assets			219
Property, plant and equipment	185		1,813
Other non-current assets			71
Accounts payable			(841)
Accrued liabilities			(594)
Debt assumed			(585)
Pension and other post-retirement benefit liabilities			(130)
Other liabilities			(102)
Intangible assets	11		834
Goodwill	12	1,800	1,824
Total	$ 233		$ 4,714