Seagate Technology (STX) 10-K 8 Aug 14 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Jun. 27, 2014	Jul. 25, 2014	Dec. 27, 2013
Document And Entity Information	'	'	'
Entity Registrant Name	'Seagate Technology plc	'	'
Entity Central Index Key	'0001137789	'	'
Document Type	'10-K	'	'
Document Period End Date	27-Jun-14	'	'
Amendment Flag	'false	'	'
Current Fiscal Year End Date	'--06-27	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Common Stock, Shares Outstanding	'	326,812,299	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$18.30

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$2,634	$1,708
Short-term investments	20	480
Restricted cash and investments	4	101
Accounts receivable, net	1,729	1,670
Inventories	985	854
Deferred income taxes	126	115
Other current assets	279	484
Total current assets	5,777	5,412
Property, equipment and leasehold improvements, net	2,136	2,269
Goodwill	537	476
Other intangible assets, net	359	405
Deferred income taxes	499	456
Other assets, net	184	225
Total Assets	9,492	9,243
Current liabilities:	'	'
Accounts payable	1,549	1,690
Accrued employee compensation	296	335
Accrued warranty	148	176
Accrued expenses	405	407
Current portion of long-term debt	0	3
Total current liabilities	2,398	2,611
Long-term accrued warranty	125	144
Long-term accrued income taxes	90	87
Other non-current liabilities	127	121
Long-term debt, less current portion	3,920	2,774
Total Liabilities	6,660	5,737
Seagate Technology plc shareholders' equity:	'	'
Preferred shares, $0.00001 par value per share—100 million authorized; no shares issued or outstanding	0	0
Ordinary shares, $0.00001 par value per share—1,250 million authorized; 326,539,322 issued and outstanding at June 27, 2014 and 359,437,036 issued and outstanding at June 28, 2013	0	0
Additional paid-in capital	5,511	5,286
Accumulated other comprehensive loss	-2	-13
Accumulated deficit	-2,677	-1,778
Total Seagate Technology plc Shareholders' Equity	2,832	3,495
Noncontrolling interest	0	11
Total Equity	2,832	3,506
Total Liabilities and Equity	$9,492	$9,243

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 27, 2014	Jun. 28, 2013
Statement of Financial Position [Abstract]	'	'
Preferred shares, par value (in dollars per share)	$0.00	$0.00
Preferred shares, shares authorized	100,000,000	100,000,000
Preferred shares, shares issued	0	0
Preferred shares, shares outstanding	0	0
Ordinary shares par value (in dollars per share)	$0.00	$0.00
Ordinary shares, shares authorized	1,250,000,000	1,250,000,000
Ordinary shares, shares issued	326,539,322	359,437,036
Ordinary shares, shares outstanding	326,539,322	359,437,036

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 27, 2014		Jun. 28, 2013		Jun. 29, 2012
Income Statement [Abstract]	'		'		'
Revenue	$13,724	[1]	$14,351	[1]	$14,939	[1]
Cost of revenue	9,878		10,411		10,255
Product development	1,226		1,133		1,006
Marketing and administrative	722		635		528
Amortization of intangibles	98		79		38
Restructuring and other, net	24		2		4
Total operating expenses	11,948		12,260		11,831
Income from operations	1,776		2,091		3,108
Interest income	8		8		8
Interest expense	-195		-214		-241
Other, net	-33		-54		7
Other expense, net	-220		-260		-226
Income before income taxes	1,556		1,831		2,882
(Benefit from) provision for income taxes	-14		-7		20
Net income	1,570		1,838		2,862
Less: Net income attributable to noncontrolling interest	0		0		0
Net income attributable to Seagate Technology plc	$1,570		$1,838		$2,862
Net income per share attributable to Seagate Technology plc ordinary shareholders:	'		'		'
Basic (in dollars per share)	$4.66		$4.97		$6.72
Diluted (in dollars per share)	$4.52		$4.81		$6.49
Number of shares used in per share calculations:	'		'		'
Basic (in shares)	337		370		426
Diluted (in shares)	347		382		441
Cash dividends declared per Seagate Technology plc ordinary share	$1.67		$1.40		$0.86
[1]	(a)Revenue is attributed to countries based on the shipping location.

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Statement of Comprehensive Income [Abstract]	'	'	'
Net income	$1,570	$1,838	$2,862
Cash flow hedges	'	'	'
Change in net unrealized gain (loss) on cash flow hedges	-1	0	-7
Less: reclassification for amounts included in net income	0	0	5
Net change	-1	0	-2
Marketable securities	'	'	'
Change in net unrealized gain (loss) on marketable securities	1	21	-3
Less: reclassification for amounts included in net income	2	-23	4
Net change	3	-2	1
Post-retirement plans	'	'	'
Change in unrealized gain (loss) on post-retirement plans	1	-3	-3
Less: reclassification for amounts included in net income	0	0	1
Net change	1	-3	-2
Foreign currency translation adjustments	'	'	'
Foreign currency translation adjustments	8	1	0
Total other comprehensive income (loss), net of tax	11	-4	-3
Comprehensive income	1,581	1,834	2,859
Less: Comprehensive income attributable to noncontrolling interest	0	1	0
Comprehensive income attributable to Seagate Technology plc	$1,581	$1,833	$2,859

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
OPERATING ACTIVITIES	'	'	'
Net income	$1,570	$1,838	$2,862
Adjustments to reconcile net income to net cash from operating activities:	'	'	'
Depreciation and amortization	879	873	814
Share-based compensation	118	76	51
Loss on redemption and repurchase of debt	81	141	17
Gain on sale of investments	-32	-61	-12
Gain on sale of property and equipment	-4	-36	-25
Deferred income taxes	-67	-70	-28
Other non-cash operating activities, net	14	12	7
Changes in operating assets and liabilities:	'	'	'
Restricted cash and investments	104	0	0
Accounts receivable, net	4	661	-824
Inventories	-20	102	99
Accounts payable	-190	-538	157
Accrued employee compensation	-55	-14	145
Accrued expenses, income taxes and warranty	-80	-170	54
Vendor non-trade receivables	217	272	-82
Other assets and liabilities	19	-39	27
Net cash provided by operating activities	2,558	3,047	3,262
INVESTING ACTIVITIES	'	'	'
Acquisition of property, equipment and leasehold improvements	-559	-786	-636
Proceeds from the sale of property and equipment	3	29	20
Proceeds from the sale of strategic investments	72	0	0
Purchases of short-term investments	-88	-351	-454
Sales of short-term investments	508	296	397
Maturities of short-term investments	61	38	119
Cash used in acquisition of businesses, net of cash acquired	-285	-36	-561
Other investing activities, net	-34	-15	1
Net cash used in investing activities	-322	-825	-1,114
FINANCING ACTIVITIES	'	'	'
Net proceeds from issuance of long-term debt	1,781	986	0
Repayments of long-term debt	-725	-1,224	-670
Repurchases of ordinary shares	-1,912	-1,654	-2,426
Dividends to shareholders	-557	-518	-372
Proceeds from issuance of ordinary shares under employee stock plans	107	259	344
Other financing activities, net	-5	-71	6
Net cash used in financing activities	-1,311	-2,222	-3,118
Effect of foreign currency exchange rate changes on cash and cash equivalents	1	1	0
Increase (decrease) in cash and cash equivalents	926	1	-970
Cash and cash equivalents at the beginning of the year	1,708	1,707	2,677
Cash and cash equivalents at the end of the year	2,634	1,708	1,707
Supplemental Disclosure of Cash Flow Information	'	'	'
Cash paid for interest	198	219	221
Cash paid for income taxes, net of refunds	$50	$48	$8

CONSOLIDATED_STATEMENTS_OF_SHA

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Total		Ordinary Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Parent [Member]	Noncontrolling Interest [Member]
In Millions, unless otherwise specified
Total Seagate Technology plc Shareholders' Equity, Starting Balance at Jul. 01, 2011	'		$0	$3,980	($6)	($1,511)	$2,463	'
Noncontrolling Interest Equity, Starting Balance at Jul. 01, 2011	'		'	'	'	'	'	0
Total Equity, Beginning Balance at Jul. 01, 2011	2,463		'	'	'	'	'	'
Starting Balance (in shares) at Jul. 01, 2011	'		425	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'		'	'	'	'	'	'
Net income	2,862		'	'	'	2,862	2,862	0
Other comprehensive loss	-3		'	'	-3	'	-3	0
Issuance of ordinary shares under employee stock plans	344		'	344	'	'	344	'
Issuance of ordinary shares under employee stock plans (in shares)	'		27	'	'	'	'	'
Repurchases of shares	-2,426	[1]	'	'	'	-2,426	-2,426	'
Repurchases of shares (in shares)	-101	[1]	-101	'	'	'	'	'
Dividends to shareholders	-369		'	'	'	-369	-369	'
Share-based compensation	51		'	51	'	'	51	'
Issuance of ordinary shares, in connection with the acquisition of Samsung HDD assets and liabilities	569		'	569	'	'	569	'
Issuance of ordinary shares, in connection with the acquisition of Samsung HDD assets and liabilities (in shares)	'		45	'	'	'	'	'
Tax benefit from exercise of stock options	6		'	6	'	'	6	'
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jun. 29, 2012	'		0	4,950	-9	-1,444	3,497	'
Noncontrolling Interest Equity, Ending Balance at Jun. 29, 2012	'		'	'	'	'	'	0
Total Equity, Ending Balance at Jun. 29, 2012	3,497		'	'	'	'	'	'
Ending Balance (in shares) at Jun. 29, 2012	'		396	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'		'	'	'	'	'	'
Net income	1,838		'	'	'	1,838	1,838	0
Other comprehensive loss	-4		'	'	-5	'	-5	1
Issuance of ordinary shares under employee stock plans	259		'	259	'	'	259	'
Issuance of ordinary shares under employee stock plans (in shares)	'		17	'	'	'	'	'
Repurchases of shares	-1,654		'	'	'	-1,654	-1,654	'
Repurchases of shares (in shares)	-54		-54	'	'	'	'	'
Dividends to shareholders	-518		'	'	'	-518	-518	'
Share-based compensation	76		'	76	'	'	76	'
Acquisition of majority shares of LaCie S.A.	72		'	'	'	'	'	72
Purchase of additional subsidiary shares from noncontrolling interest	-61		'	'	1	'	1	-62
Tax benefit from exercise of stock options	1		'	1	'	'	1	'
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jun. 28, 2013	3,495		0	5,286	-13	-1,778	3,495	'
Noncontrolling Interest Equity, Ending Balance at Jun. 28, 2013	11		'	'	'	'	'	11
Total Equity, Ending Balance at Jun. 28, 2013	3,506		'	'	'	'	'	'
Ending Balance (in shares) at Jun. 28, 2013	'		359	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'		'	'	'	'	'	'
Net income	1,570		'	'	'	1,570	1,570	0
Other comprehensive loss	11		'	'	10	'	10	1
Issuance of ordinary shares under employee stock plans	107		'	107	'	'	107	'
Issuance of ordinary shares under employee stock plans (in shares)	'		9	'	'	'	'	'
Repurchases of shares	-1,912		'	'	'	-1,912	-1,912	'
Repurchases of shares (in shares)	-41		-41	'	'	'	'	'
Dividends to shareholders	-557		'	'	'	-557	-557	'
Share-based compensation	118		'	118	'	'	118	'
Purchase of additional subsidiary shares from noncontrolling interest	-11		'	'	1	'	1	-12
Tax benefit from exercise of stock options	0.3		'	'	'	'	'	'
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jun. 27, 2014	2,832		0	5,511	-2	-2,677	2,832	'
Noncontrolling Interest Equity, Ending Balance at Jun. 27, 2014	0		'	'	'	'	'	0
Total Equity, Ending Balance at Jun. 27, 2014	$2,832		'	'	'	'	'	'
Ending Balance (in shares) at Jun. 27, 2014	'		327	'	'	'	'	'
[1]	(a) Includes 21 million shares of repurchases for $305 million under the January 2010 Anti-Dilution Share Repurchase Program.

Basis_of_Presentation_and_Summ

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Jun. 27, 2014
Accounting Policies [Abstract]	'
Basis of Presentation and Summary of Significant Accounting Policies	'
	Basis of Presentation and Summary of Significant Accounting Policies
	Organization
	The Company is a leading provider of electronic data storage solutions. Its principal products are hard disk drives, commonly referred to as disk drives, hard drives or HDDs. Hard disk drives are devices that store digitally encoded data on rapidly rotating disks with magnetic surfaces. Disk drives are used as the primary medium for storing electronic data. In addition to HDDs, we produce a broad range of electronic data storage products including solid state hybrid drives (“SSHD”) and solid state drives (“SSD”).
	The Company's products are designed for enterprise servers and storage systems in mission critical and nearline applications; client compute applications, where its products are designed primarily for desktop and mobile computing; and client non-compute applications, where its products are designed for a wide variety of end user devices such as digital video recorders (“DVRs”), personal data backup systems, portable external storage systems and digital media systems.
	The Company continues to make strategic investments in order to expand its storage solutions, enter new market adjacencies, and expand our technical expertise. As a result of recent acquisitions, the Company's product and solution portfolio for the enterprise data storage industry includes storage enclosures, integrated application platforms and high performance computing ("HPC") data storage solutions. The Company's storage subsystems support a range of high-speed interconnect technologies to meet demanding cost and performance specifications. The Company's modular subsystem architecture allows it to support many segments within the networked storage market by enabling different specifications of storage subsystem designs to be created from a standard set of interlocking technology modules.
	In addition to manufacturing and selling data storage products, the Company provides data storage services for small to medium-sized businesses, including online backup, data protection and recovery solutions.
	Basis of Presentation and Consolidation
	The consolidated financial statements include the accounts of the Company and all its wholly-owned and majority-owned subsidiaries, after elimination of intercompany transactions and balances.
	The preparation of financial statements in accordance with U.S. generally accepted accounting principles also requires management to make estimates and assumptions that affect the amounts reported in the Company’s condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. The methods, estimates and judgments the Company uses in applying its most critical accounting policies have a significant impact on the results the Company reports in its condensed consolidated financial statements. The condensed consolidated financial statements reflect, in the opinion of management, all material adjustments necessary to present fairly the condensed consolidated financial position, results of operations, comprehensive income, cash flows and shareholders’ equity for the periods presented. Such adjustments are of a normal and recurring nature.
	The Company operates and reports financial results on a fiscal year of 52 or 53 weeks ending on the Friday closest to June 30. Accordingly, fiscal years 2014, 2013 and 2012 were comprised of 52 weeks and ended on June 27, 2014, June 28, 2013, and June 29, 2012, respectively. All references to years in the Notes to Consolidated Financial Statements represent fiscal years unless otherwise noted.
	Summary of Significant Accounting Policies
	Cash, Cash Equivalents and Short-Term Investments. The Company considers all highly liquid investments with a remaining maturity of 90 days or less at the time of purchase to be cash equivalents. Cash equivalents are carried at cost, which approximates fair value. The Company's short-term investments are primarily comprised of readily marketable debt securities with remaining maturities of more than 90 days at the time of purchase. The Company has classified its entire investment portfolio as available-for-sale and it is stated at fair value with unrealized gains and losses included in Accumulated other comprehensive income (loss), which is a component of Shareholders' Equity. The Company evaluates the available-for sale securities in an unrealized loss position for other-than-temporary impairment. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization and accretion are included in interest income. Realized gains and losses are included in Other, net. The cost of securities sold is based on the specific identification method.
	Restricted Cash and Investments. Restricted cash and investments represents cash and cash equivalents and investments that are restricted as to withdrawal or use for other than current operations.
	Allowances for Doubtful Accounts.    The Company maintains an allowance for uncollectible accounts receivable based upon expected collectability. This reserve is established based upon historical trends, global macroeconomic conditions and an analysis of specific exposures. The provision for doubtful accounts is recorded as a charge to Marketing and administrative expense.
	Inventory.    Inventories are valued at the lower of cost (using the first-in, first-out method) or market. Market value is based upon an estimated average selling price reduced by estimated cost of completion and disposal.
	Property, Equipment and Leasehold Improvements.    Property, equipment and leasehold improvements are stated at cost. Equipment and buildings are depreciated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated life of the asset or the remaining term of the lease. The costs of additions and substantial improvements to property, equipment and leasehold improvements, which extend the economic life of the underlying assets, are capitalized. The cost of maintenance and repairs to property, equipment and leasehold improvements are expensed as incurred.
	Assessment of Goodwill and Other Long-lived Assets for Impairment. The Company accounts for goodwill in accordance with Accounting Standards Codification (ASC) Topic 350 (ASC 350), Intangibles - Goodwill and Other. During fiscal year 2012, the Company adopted ASU No. 2011-08, Intangibles - Goodwill and Other (ASC Topic 350) - Testing Goodwill for Impairment. The Company performs a qualitative assessment at the end of each reporting period to determine if any events or circumstances exist, such as an adverse change in business climate or a decline in the overall industry that would indicate that it would more likely than not reduce the fair value of a reporting unit below its carrying amount, including goodwill.
	The Company tests other long-lived assets, including property, equipment and leasehold improvements and other intangible assets subject to amortization, for recoverability whenever events or changes in circumstances indicate that the carrying value of those assets may not be recoverable. The Company performs a recoverability test to assess the recoverability of an asset group. If the recoverability test indicates that the carrying value of the asset group is not recoverable, the Company will estimate the fair value of the asset group and the excess of the carrying value over the fair value is allocated pro rata to derive the adjusted carrying value of assets in the asset group. The adjusted carrying value of each asset in the asset group is not reduced below its fair value.
	The Company tests other intangible assets not subject to amortization whenever events occur or circumstances change, such as declining financial performance, deterioration in the environment in which the entity operates or deteriorating macroeconomic conditions that have a negative effect on future expected earnings and cash flows that could affect significant inputs used to determine the fair value of the indefinite-lived intangible asset.
	Derivative Financial Instruments.    The Company applies the requirements of ASC Topic 815 (ASC 815), Derivatives and Hedging. ASC 815 requires that all derivatives be recorded on the balance sheet at fair value and establishes criteria for designation and effectiveness of hedging relationships.
	Establishment of Warranty Accruals.    The Company estimates probable product warranty costs at the time revenue is recognized. The Company generally warrants its products for a period of 1 to 5 years. The Company's warranty provision considers estimated product failure rates and trends (including the timing of product returns during the warranty periods), and estimated repair or replacement costs related to product quality issues, if any. The Company also exercises judgment in estimating its ability to sell certain repaired disk drives. Should actual experience in any future period differ significantly from its estimates, the Company's future results of operations could be materially affected.
	Revenue Recognition, Sales Returns and Allowances, and Sales Incentive Programs.    The Company's revenue recognition policy complies with ASC Topic 605 (ASC 605), Revenue Recognition. Revenue from sales of products, including sales to distribution customers, is generally recognized when title and risk of loss has passed to the buyer, which typically occurs upon shipment from the Company or third party warehouse facilities, persuasive evidence of an arrangement exists, including a fixed or determinable price to the buyer, and when collectability is reasonably assured. Revenue from sales of products to certain direct retail customers and to customers in certain indirect retail channels is recognized on a sell-through basis.
	The Company records estimated product returns at the time of shipment. The Company also estimates reductions to revenue for sales incentive programs, such as price protection, and volume incentives, and records such reductions when revenue is recorded. The Company establishes certain distributor and OEM sales programs aimed at increasing customer demand. For OEM sales, rebates are typically based on an OEM customer's volume of purchases from Seagate or other agreed upon rebate programs. For the distribution channel, these programs typically involve rebates related to a distributor's level of sales, order size, advertising or point of sale activity and price protection adjustments. The Company provides for these obligations at the time that revenue is recorded based on estimated requirements. Marketing development programs are recorded as a reduction to revenue.
	Shipping and Handling.    The Company includes costs related to shipping and handling in Cost of revenue for all periods presented.
	Restructuring Costs.     The Company records restructuring activities including costs for one-time termination benefits in accordance with ASC Topic 420 (ASC 420), Exit or Disposal Cost Obligations. The timing of recognition for severance costs accounted for under ASC 420 depends on whether employees are required to render service until they are terminated in order to receive the termination benefits. If employees are required to render service until they are terminated in order to receive the termination benefits, a liability is recognized ratably over the future service period. Otherwise, a liability is recognized when management has committed to a restructuring plan and has communicated those actions to employees. Employee termination benefits covered by existing benefit arrangements are recorded in accordance with ASC Topic 712, Non-retirement Postemployment Benefits. These costs are recognized when management has committed to a restructuring plan and the severance costs are probable and estimable.
	Advertising Expense.    The cost of advertising is expensed as incurred. Advertising costs were approximately $52 million, $51 million and $39 million in fiscal years 2014, 2013 and 2012, respectively.
	Stock-Based Compensation.    The Company accounts for stock-based compensation under the provisions of ASC Topic 718 (ASC 718), Compensation-Stock Compensation. The Company has elected to apply the with-and-without method to assess the realization of excess tax benefits.
	Accounting for Income Taxes. The Company accounts for income taxes pursuant to ASC Topic 740 (ASC 740), Incomes Taxes. In applying ASC 740, the Company makes certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments occur in the calculation of tax credits, recognition of income and deductions and calculation of specific tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes, as well as tax liabilities associated with uncertain tax positions. The calculation of tax liabilities involves uncertainties in the application of complex tax rules and the potential for future adjustment of the Company’s uncertain tax positions by the Internal Revenue Service or other tax jurisdictions. If estimates of these tax liabilities are greater or less than actual results, an additional tax benefit or provision will result. The deferred tax assets the Company records each period depend primarily on the Company’s ability to generate future taxable income in the United States and certain non-U.S. jurisdictions. Each period, the Company evaluates the need for a valuation allowance for its deferred tax assets and, if necessary, adjusts the valuation allowance so that net deferred tax assets are recorded only to the extent the Company concludes it is more likely than not that these deferred tax assets will be realized. If the Company’s outlook for future taxable income changes significantly, the Company’s assessment of the need for a valuation allowance may also change.
	Comprehensive Income. In the first quarter of fiscal 2013, the Company adopted the revised requirements of ASU No. 2011-05, Comprehensive Income (Topic 220)-Presentation of Comprehensive Income to present comprehensive income in a separate statement. Comprehensive income is comprised of net income and other gains and losses affecting equity that are excluded from net income.
	Foreign Currency Remeasurement and Translation.    The U.S. dollar is the functional currency for the majority of the Company's foreign operations. Monetary assets and liabilities denominated in foreign currencies are remeasured into the functional currency of the subsidiary at the balance sheet date. The gains and losses from the remeasurement of foreign currency denominated balances into the functional currency of the subsidiary are included in Other, net on the Company's Consolidated Statements of Operations.
	The Company translates the assets and liabilities of its non-U.S. dollar functional currency subsidiaries into U.S. dollars using exchange rates in effect at the end of each period. Revenue and expenses for these subsidiaries are translated using rates that approximate those in effect during the period. Gains and losses from these translations are recognized in foreign currency translation included in Accumulated other comprehensive loss, which is a component of shareholders’ equity. The Company’s subsidiaries that use the U.S. dollar as their functional currency remeasure monetary assets and liabilities at exchange rates in effect at the end of each period, and inventories, property, and nonmonetary assets and liabilities at historical rates. Gains and losses from these remeasurements were not significant and have been included in the Company’s results of operations.
	Concentrations
	Concentration of Credit Risk.    The Company's customer base for disk drive products is concentrated with a small number of OEMs and distributors. The Company does not generally require collateral or other security to support accounts receivable. To reduce credit risk, the Company performs ongoing credit evaluations on its customers' financial condition. The Company establishes an allowance for doubtful accounts based upon factors surrounding the credit risk of customers, historical trends and other information. Hewlett-Packard Company and Dell Inc. each accounted for more than 10% of the Company's accounts receivable as of June 27, 2014.
	Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash equivalents, short-term investments and foreign currency forward exchange contracts. The Company further mitigates concentrations of credit risk in its investments through diversification, by limiting its investments in the debt securities of a single issuer, and investing in highly rated securities.
	In entering into foreign currency forward exchange contracts, the Company assumes the risk that might arise from the possible inability of counterparties to meet the terms of their contracts. The counterparties to these contracts are major multinational commercial banks, and the Company has not incurred and does not expect any losses as a result of counterparty defaults.
	Supplier Concentration. Certain of the raw materials, components and equipment used by the Company in the manufacture of its products are available from a sole supplier or a limited number of suppliers. Shortages could occur in these essential materials and components due to an interruption of supply or increased demand in the industry. If the Company were unable to procure certain materials, components or equipment at acceptable prices, it would be required to reduce its manufacturing operations, which could have a material adverse effect on its results of operations. In addition, the Company has made prepayments to certain suppliers. Should these suppliers be unable to deliver on their obligations or experience financial difficulty, the Company may not be able to recover these prepayments.
	Recent Accounting Pronouncements
	In July, 2013, the FASB issued ASU No. 2013-11, Income Taxes (ASC Topic 740) — Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The amendments in this ASU provide explicit guidance that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with limited exceptions. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013 and do not require new recurring disclosures. The adoption of this new guidance will not have a material impact on the Company’s consolidated financial statements.
	In May 2014, The FASB issued ASU 2014-09 (ASC Topic 606), Revenue from Contracts with Customers. The ASU outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. It also requires entities to disclose both quantitative and qualitative information that enable financial statements users to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The ASU will be effective for the Company's first quarter of fiscal year 2018. The Company is in the process of assessing the impact, if any, of ASU 2014-09 on its consolidated financial statements.

Balance_Sheet_Information

Balance Sheet Information	12 Months Ended
	Jun. 27, 2014
Disclosure Text Block Supplement [Abstract]	'
Balance Sheet Information	'
	Balance Sheet Information
	Investments
	The following table summarizes, by major type, the fair value and amortized cost of the Company's investments as of June 27, 2014:
	(Dollars in millions)		Amortized				Unrealized				Fair
			Cost				Gain/(Loss)				Value
	Available-for-sale securities:
	Money market funds		$	793			$	—			$	793
	Commercial paper		1,261				—				1,261
	Corporate bonds		6				—				6
	U.S. treasuries and agency bonds		—				—				—
	Certificates of deposit		273				—				273
	Auction rate securities		—				—				—
	Equity securities		—				—				—
	Other debt securities		—				—				—
			2,333				—				2,333
	Trading securities		—				—				—
	Total		$	2,333			$	—			$	2,333
	Included in Cash and cash equivalents										$	2,309
	Included in Short-term investments										20
	Included in Restricted cash and investments										4
	Included in Other assets, net										—
	Total										$	2,333
	As of June 27, 2014, the Company's Restricted cash and investments consisted of $4 million in cash and investments held as collateral at banks for various performance obligations.
	During the fourth quarter of 2014, the Company sold all of its auction rate securities and recognized an immaterial loss on the sale which is included in Other, net in the Company's Consolidated Statement of Operations.
	As of June 27, 2014, the Company had no available-for-sale securities that had been in a continuous unrealized loss position for a period greater than 12 months. The Company determined no available-for-sale securities were other-than-temporarily impaired as of June 27, 2014.
	The fair value and amortized cost of the Company's investments classified as available-for-sale at June 27, 2014 by remaining contractual maturity was as follows:
	(Dollars in millions)		Amortized				Fair
			Cost				Value
	Due in less than 1 year		$	2,332			$	2,332
	Due in 1 to 5 years		1				1
	Due in 5 to 10 years		—				—
	Thereafter		—				—
	Total		$	2,333			$	2,333
	Equity securities which do not have a contractual maturity date are not included in the above table.
	The following table summarizes, by major type, the fair value and amortized cost of the Company's investments as of June 28, 2013:
	(Dollars in millions)		Amortized				Unrealized				Fair
			Cost				Gain/(Loss)				Value
	Available-for-sale securities:
	Money market funds		$	804			$	—			$	804
	Commercial paper		655				—				655
	Corporate bonds		211				—				211
	U.S. treasuries and agency bonds		96				—				96
	Certificates of deposit		154				—				154
	Auction rate securities		17				(2		)		15
	Equity securities		4				—				4
	Other debt securities		107				(1		)		106
			2,048				(3		)		2,045
	Trading securities		74				5				79
	Total		$	2,122			$	2			$	2,124
	Included in Cash and cash equivalents										$	1,528
	Included in Short-term investments										480
	Included in Restricted cash and investments										101
	Included in Other assets, net										15
	Total										$	2,124
	As of June 28, 2013, the Company's Restricted cash and investments consisted of $79 million in cash and investments held in trust for payment of its non-qualified deferred compensation plan liabilities and $22 million in cash and investments held as collateral at banks for various performance obligations.
	As of June 28, 2013, the Company's available-for-sale securities include investments in auction rate securities. Beginning in fiscal year 2008, the Company's auction rate securities failed to settle at auction and continued to fail through June 28, 2013. Since the Company continued to earn interest on its auction rate securities at the maximum contractual rate, there were no payment defaults with respect to such securities, and they were all collateralized, the Company expected to recover the entire amortized cost basis of these auction rate securities. During fiscal year 2013, the Company did not intend to sell these securities and as of June 28, 2013, concluded it was not more likely than not that the Company would have been required to sell the securities before the recovery of their amortized cost basis. As such, as of June 28, 2013, the Company believed the impairments totaling $2 million were not other-than-temporary and therefore were recorded in Accumulated other comprehensive loss. Given the uncertainty as to when the liquidity issues associated with these securities would improve, as of June 28, 2013, these securities were classified within Other assets, net in the Company's Consolidated Balance Sheet.
	As of June 28, 2013, with the exception of the Company's auction rate securities, the Company had no available-for-sale securities that had been in a continuous unrealized loss position for a period greater than 12 months.  The Company determined no available-for-sale securities were other-than-temporarily impaired as of June 28, 2013.
	Accounts Receivable, net
	The following table provides details of the accounts receivable, net balance sheet item:
	(Dollars in millions)		June 27,				June 28,
			2014				2013
	Accounts receivable		$	1,741			$	1,678
	Allowance for doubtful accounts		(12		)		(8		)
		$	1,729			$	1,670
Activity in the allowance for doubtful accounts is as follows:
(Dollars in millions)		Balance at				Charges			Deductions (a)			Assumed from		Balance at
		Beginning of				(credit) to						LaCie S.A.		End of
		Period				Operations								Period
Fiscal year ended June 29, 2012		$	10			3			(3	)		—		$	10
Fiscal year ended June 28, 2013		$	10			(2	)		(1	)		1		$	8
Fiscal year ended June 27, 2014		$	8			4			—			—		$	12
___________________________________
(a)	Uncollectible accounts written off, net of recoveries.
Inventories
The following table provides details of the inventory balance sheet item:
(Dollars in millions)		June 27,				June 28,
		2014				2013
Raw materials and components		$	324			$	213
Work-in-process		267				231
Finished goods		394				410
		$	985			$	854
Other Current Assets
The following table provides details of the other current assets balance sheet item:
(Dollars in millions)		June 27,				June 28,
		2014				2013
Vendor non-trade receivables		$	112			$	329
Other		167				155
		$	279			$	484
Other current assets include non-trade receivables from certain manufacturing vendors resulting from the sale of components to these vendors who manufacture completed sub-assemblies or finished goods for the Company. The Company does not reflect the sale of these components in revenue and does not recognize any profits on these sales. The costs of the completed sub-assemblies are included in inventory upon purchase from the vendors.
Property, Equipment and Leasehold Improvements, net
The components of property, equipment and leasehold improvements, net were as follows:
(Dollars in millions)		Useful Life		June 27,				June 28,
		in Years		2014				2013
Land and land improvements				$	45			$	44
Equipment		3 – 5		7,159				6,838
Buildings and leasehold improvements		Up to 48		1,452				1,401
Construction in progress				323				261
				8,979				8,544
Less: accumulated depreciation and amortization				(6,843		)		(6,275		)
				$	2,136			$	2,269
Depreciation expense, which includes amortization of leasehold improvements, was $748 million, $727 million and $739 million for fiscal years 2014, 2013, and 2012, respectively. Interest on borrowings related to eligible capital expenditures is capitalized as part of the cost of the qualified assets and amortized over the estimated useful lives of the assets. During fiscal years 2014, 2013, and 2012, the Company capitalized interest of $7 million, $10 million and $4 million, respectively.
Accumulated Other Comprehensive Income (Loss) (“AOCI”)
The components of AOCI, net of tax, were as follows:
(Dollars in millions)		Unrealized				Unrealized				Unrealized			Foreign			Total
		Gains (Losses)				Gains (Losses)				Gains (Losses)			Currency
		on Cash Flow				on Marketable				on post-			Translation
		Hedges				Securities (a)				retirement plans			Adjustments
Balance at June 29, 2012		$	—			$	(1	)		$	(8	)	$	—		$	(9	)
Other comprehensive income (loss) before reclassifications		—				21				(3		)	1			19
Amounts reclassified from AOCI		—				(23		)		—			—			(23		)
Other comprehensive income (loss)		—				(2		)		(3		)	1			(4		)
Balance at June 28, 2013		—				(3		)		(11		)	1			(13		)
Other comprehensive income (loss) before reclassifications		(1		)		1				1			8			9
Amounts reclassified from AOCI		—				2				—			—			2
Other comprehensive income (loss)		(1		)		3				1			8			11
Balance at June 27, 2014		$	(1	)		$	—			$	(10	)	$	9		$	(2	)
___________________________________________
(a)	The cost of a security sold or the amount reclassified out of AOCI into earnings was determined using the specific identification method.

Acquisitions

Acquisitions	12 Months Ended
	Jun. 27, 2014
Business Combinations [Abstract]	'
Acquisitions	'
	Acquisitions
	Xyratex Ltd
	On March 31, 2014, the Company acquired all of the outstanding shares of Xyratex Ltd (“Xyratex”), a leading provider of data storage technology. The Company paid $13.25 per share, or approximately $376 million in cash for the acquisition. The acquisition of Xyratex further strengthens the Company’s vertically integrated supply and manufacturing chain for disk drives and provides access to important capital requirements, as well as expands the Company’s storage solutions portfolio.
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date:
	(Dollars in millions)	Amount
	Cash and cash equivalents	$	91
	Accounts receivable, net	67
	Inventories	111
	Other current and non-current assets	28
	Property, plant and equipment	55
	Intangible assets	80
	Goodwill	60
	Total assets	492
	Accounts payable and accrued expenses	(116		)
	Total liabilities	(116		)
	Total	$	376
	The accounts receivables of $67 million are net of an immaterial allowance at March 31, 2014.
	The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:
	(Dollars in millions)	Fair Value			Weighted-
					Average
					Amortization
					Period
	Existing technology	$	23		5.5 years
	Customer relationships	18			3.9 years
	Total amortizable intangible assets acquired	41			4.8 years
	In-process research and development	39
	Total acquired identifiable intangible assets	$	80
	The goodwill recognized is primarily attributable to the synergies expected to arise after the acquisition, and is not deductible for income tax purposes.
	The Company incurred a total of $10 million of expenses related to the acquisition of Xyratex in fiscal year 2014, which are included within Marketing and administrative expense on the Consolidated Statement of Operations.
	The amounts of revenue and earnings of Xyratex included in the Company's Consolidated Statement of Operations from the acquisition date are not significant.
	LaCie S.A.
	On August 3, 2012 the Company acquired 23,382,904 (or approximately 64.5%) of the outstanding shares of LaCie S.A. (“LaCie”) for a price of €4.05 per share with a price supplement of €0.12 per share, which would have been payable if the Company had successfully acquired at least 95% of the outstanding shares of LaCie within 6 months of the acquisition. Of the amount paid at the acquisition date, €9 million is treated as compensation cost to one of the selling shareholders, who is now an employee of the Company, to be recognized over a period of 36 months from the acquisition date, and may be refunded to the Company if the selling shareholder is no longer employed at the end of that period. The transaction and related agreements are expected to accelerate the Company's growth strategy in the expanding consumer storage market, particularly in Europe, Japan and in premium distribution channels.
	The acquisition-date fair value of the consideration transferred for the business combination totaled $111 million, including cash paid of $107 million, and contingent consideration of $4 million.
	The following table summarizes the estimated fair values of the assets acquired, liabilities assumed, and noncontrolling interest at the acquisition date:
	(Dollars in millions)	Amount
	Cash and cash equivalents	$	71
	Accounts receivable	29
	Marketable securities	27
	Inventories	46
	Other current and non-current assets	19
	Property, plant and equipment	12
	Intangible assets	45
	Goodwill	13
	Total assets	262
	Accounts payable and accrued expenses	(73		)
	Current and non-current portion of long-term debt	(6		)
	Total liabilities	(79		)
	Noncontrolling interest	(72		)
	Total	$	111
	The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:
	(Dollars in millions)	Fair Value			Weighted-
					Average
					Amortization
					Period
	Customer relationships	$	31		5.0 years
	Existing technology	1			5.0 years
	Trade name	13			5.0 years
	Total acquired identifiable intangible assets	$	45
	In fiscal 2013, the Company recorded adjustments to the fair value of certain assets acquired and liabilities assumed with LaCie S.A. that resulted in a net increase of $1 million to Goodwill, and a corresponding decrease in Intangible assets.
	The goodwill recognized is attributable primarily to the benefits the Company expects to derive from LaCie's brand recognition and the acquired workforce, and is not deductible for income tax purposes. The acquisition date fair value of the noncontrolling interest is based on the market price of their publicly traded shares as of the first trading date subsequent to the acquisition, as the shares did not trade on the acquisition date.
	The €0.12 supplement was not paid as only 94.5% of the LaCie business was acquired within six months of the acquisition date, resulting in a reversal of the contingent consideration liability which was recorded in fiscal year 2013 as a reduction of Marketing and administrative expenses of $4 million.
	The amounts of revenue and earnings of LaCie included in the Company's Consolidated Statement of Operations from the acquisition date are not significant.
	The Company deposited $72 million into an escrow account in fiscal year 2013 with the intention of acquiring the remaining publicly held shares of LaCie through public and private transactions. As of December 27, 2013, the Company had completed the acquisition of all outstanding shares. The use of this deposit in fiscal year 2013 is treated as a non-cash financing activity and excluded from the Statement of Cash Flows.
Samsung Hard Disk Drive Operations
On December 19, 2011, the Company completed the acquisition of Samsung Electronics Co., Ltd's (“Samsung”) hard disk drive business pursuant to an Asset Purchase Agreement (“APA”) by which the Company acquired certain assets and liabilities of Samsung relating to the research and development, manufacture and sale of hard-disk drives. The transaction and related agreements are expected to improve the Company's position as a supplier of 2.5-inch products; position the Company to better address rapidly evolving opportunities in markets including, but not limited to, mobile computing, cloud computing and solid state storage; expand the Company's customer access in China and Southeast Asia; and accelerate time to market for new products.
The acquisition-date fair value of the consideration transferred totaled $1,140 million, which consisted of $571 million of cash, $10 million of which was paid as a deposit upon signing the APA in the fourth quarter of fiscal year 2011, and 45.2 million ordinary shares with a fair value of $569 million.  The fair value of the ordinary shares issued was determined based on the closing market price of the Company's ordinary shares on the acquisition date, less a 16.5% discount for lack of marketability as the shares issued are subject to a restriction that limits their trade or transfer for approximately a one year period.
The following table summarizes the fair values of the assets acquired and liabilities assumed at the acquisition date:
(Dollars in millions)	Amount
Inventories	$	141
Equipment	76
Intangible assets	580
Other assets	28
Total identifiable assets acquired	825
Warranty liability	(72		)
Other liabilities	(45		)
Total liabilities assumed	(117		)
Net identifiable assets acquired	708
Goodwill	432
Net assets acquired	$	1,140
The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:
(Dollars in millions)	Fair Value			Weighted-
				Average
				Amortization
				Period
Existing technology	$	137		2.0 years
Customer relationships	399			5.8 years
Total amortizable intangible assets acquired	536			4.8 years
In-process research and development	44
Total acquired identifiable intangible assets	$	580
During fiscal year 2012, the Company recorded adjustments to the fair value of certain assets acquired and liabilities assumed with the Samsung HDD business that resulted in a net decrease of $5 million to goodwill. These adjustments included a $7 million increase in other assets for spare parts and a $3 million increase to equipment, offset by a $3 million increase in warranty liability and a $2 million increase in other liabilities related to certain assumed vendor obligations. These adjustments were based on information about facts and circumstances that existed at the acquisition date.
The $432 million of goodwill recognized is attributable primarily to the benefits the Company expects to derive from enhanced scale and efficiency to better serve its markets and expanded customer presence in China and Southeast Asia. Except for approximately $4 million of goodwill relating to assembled workforce in Korea, none of the goodwill is expected to be deductible for income tax purposes.
The Company incurred a total of $22 million of expenses related to the acquisition of Samsung in fiscal year 2012, which are included within Marketing and administrative expense on the Consolidated Statement of Operations.
The amounts of revenue and earnings of the acquired assets of Samsung's HDD business included in the Company's Consolidated Statement of Operations from the acquisition date to the period ended June 29, 2012, were as follows:
(Dollars in millions)	Amount
Revenue	$	970
Net income	$	104
The unaudited pro forma financial results presented below for the fiscal year ended June 29, 2012, include the effects of pro forma adjustments as if the acquisition date occurred as of the beginning of the prior fiscal year on July 3, 2010. The pro forma results combine the historical results of the Company for the fiscal year ended June 29, 2012 and the historical results of the acquired assets and liabilities of Samsung's HDD business, and include the effects of certain fair value adjustments and the elimination of certain activities excluded from the transaction. The pro forma financial information is presented for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of the earliest period presented, nor is it intended to be a projection of future results.
	Fiscal Year Ended
(Dollars in millions)	29-Jun-12
Revenue	$	16,113
Net income	$	2,761
The pro forma results for the fiscal year ended June 29, 2012, includes an adjustment of $65 million to reflect the additional depreciation and amortization that would have been charged assuming the fair value adjustments to property, plant and equipment and intangible assets had been applied on July 3, 2010.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Jun. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	Goodwill
	The changes in the carrying amount of goodwill are as follows:
	(Dollars in millions)	Amount
	Balance as of June 29, 2012	$	463
	Goodwill acquired	13
	Balance as of June 28, 2013	476
	Goodwill acquired	60
	Foreign currency translation effect	1
	Balance as of June 27, 2014	$	537
	Other Intangible Assets
	Other intangible assets consist primarily of existing technology, customer relationships and in-process research and development acquired in business combinations. With the exception of in-process research and development, acquired intangibles are amortized on a straight-line basis over the respective estimated useful lives of the assets. Amortization of the existing technology intangible asset is charged to Cost of revenue while the amortization of the other intangible assets is included in Operating expenses in the Consolidated Statements of Operations. In-process research and development has been determined to have an indefinite useful life and is not amortized, but instead tested for impairment annually or more frequently if events or changes in circumstance indicate that the asset might be impaired. If the carrying amount of in-process research and development exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. There were no impairment charges recognized for in-process research and development. Upon completion of the in-process research and development, the related assets will be accounted for as a finite-lived intangible asset, and will be amortized over its useful life.
	In fiscal years 2014, 2013 and 2012, amortization expense for other intangible assets was $131 million, $147 million and $75 million, respectively.
	The carrying value of other intangible assets subject to amortization as of June 27, 2014, is set forth in the following table:
	(Dollars in millions)		Gross Carrying		Accumulated			Net Carrying		Weighted Average
			Amount		Amortization			Amount		Remaining Useful Life
	Existing technology		$	24	$	(1	)	$	23	5.2 years
	Customer relationships		450		(192		)	258		3.3 years
	Trade name		10		(1		)	9		3.1 years
	In-process research and development (a)		44		(17		)	27		1.0 year
	Other intangible assets		4		(1		)	3		4.4 years
	Total amortizable other intangible assets		$	532	$	(212	)	$	320	3.2 years
	___________________________________
	(a)	During the fiscal year 2014 quarter ended December 2013, the In-process research and development was completed, and the related asset was accounted for as a finite-lived intangible asset.
	The carrying value of In-process research and development not subject to amortization was $39 million on June 27, 2014.
	The carrying value of other intangible assets subject to amortization as of June 28, 2013 is set forth in the following table:
	(Dollars in millions)		Gross Carrying		Accumulated			Net Carrying		Weighted Average
			Amount		Amortization			Amount		Remaining Useful Life
	Existing technology		$	138	$	(105	)	$	33	0.5 years
	Customer relationships		431		(114		)	317		4.3 years
	Trade name		14		(3		)	11		4.1 years
	Total amortizable other intangible assets		$	583	$	(222	)	$	361	3.9 years
	The carrying value of In-process research and development not subject to amortization was $44 million on June 28, 2013.
	As of June 27, 2014, expected amortization expense for other intangible assets for each of the next five years and thereafter is as follows:
	(Dollars in millions)		Amount
	2015		$	112
	2016		89
	2017		78
	2018		36
	2019		3
	Thereafter		2
			$	320

Restructuring_and_Exit_Costs

Restructuring and Exit Costs	12 Months Ended
	Jun. 27, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring and Exit Costs	'
	Restructuring and Exit Costs
	During fiscal year 2014, the Company recorded restructuring charges of $24 million comprised primarily of charges related to employee termination costs associated with a reduction in force during fiscal year 2014. During fiscal years 2013 and 2012, the Company recorded restructuring and other charges of $2 million and $4 million, respectively, mainly comprised of post-employment costs associated with a number of small restructuring plans. The Company's significant restructuring plans are described below. All restructuring charges are reported in Restructuring and other, net on the Consolidated Statements of Operations.
	Ang Mo Kio (AMK) Plan. In August 2009, the Company announced that it will close its AMK manufacturing operations in Singapore. Operations at this facility had ceased as of the third quarter of fiscal year 2011. The hard drive manufacturing operations have been relocated to other existing Seagate facilities and the Company's Asia International Headquarters remains in Singapore. This closure and relocation is part of the Company's ongoing focus on cost efficiencies in all areas of its business and is intended to facilitate leveraging manufacturing investments across fewer sites. The Company currently estimates total restructuring charges of approximately $50 million, all in cash, including approximately $42 million for post-employment benefits, approximately $6 million for the relocation of manufacturing equipment, and approximately $2 million for other plant closure and relocation costs. From the inception of the plan the Company has recorded $48 million in restructuring charges. During fiscal year 2014, there were no cash payments or other settlements under the AMK Plan and no restructuring charges related to the plan during fiscal year 2014. Payments under the AMK plan are expected to continue through fiscal year 2016.
	2014 Plan. During fiscal year 2014, the Company recorded employee termination costs of $16 million and made cash payments of $16 million associated with a reduction in the work force. The 2014 Plan was substantially completed during the fiscal year ended June 27, 2014.
	Other Restructuring and Exit Costs.    Through June 27, 2014, the Company has recorded other restructuring charges of approximately $124 million, net of adjustments, related to the previously announced closures of its Pittsburgh, Pennsylvania and Milpitas, California facilities, and also has recorded certain exit costs aggregating to $269 million related to its acquisition of Maxtor. These plans are currently expected to result in total charges of approximately $400 million. During fiscal year 2014, the Company incurred restructuring charges of $4 million in post-employment benefits, $2 million in facility lease obligations and $2 million in other exit costs primarily related to the closures of its Pittsburgh, Pennsylvania and Milpitas, California facilities and to other smaller restructuring plans. In addition, recorded cash payments and other settlements of $11 million related to these plans during fiscal year 2014. Restructuring activity relating to the Milpitas, California facility was completed during the fiscal year ended June 28, 2013. Payment of these exit costs relating to the Pittsburgh, Pennsylvania facility and other smaller restructuring plans are expected to continue through the end of fiscal year 2023.
	The following table summarizes the Company's restructuring activities under all the Company’s active restructuring plans for fiscal years 2014, 2013 and 2012:
	(Dollars in millions)	Post-			Operating			Other			Total
		Employment			Leases			Exit
		Benefits						Costs
	All Restructuring Activities
	Accrual balances at July 1, 2011	$	8		$	31		$	—		$	39
	Restructuring charges	3			—			2			5
	Cash payments	(8		)	(8		)	(2		)	(18		)
	Adjustments	—			(1		)	—			(1		)
	Accrual balances at June 29, 2012	3			22			—			25
	Restructuring charges	1			1			1			3
	Cash payments	(2		)	(7		)	(1		)	(10		)
	Adjustments	—			(1		)	—			(1		)
	Accrual balances at June 28, 2013	2			15			—			17
	Restructuring charges	18			3			2			23
	Cash payments	(20		)	(5		)	(2		)	(27		)
	Adjustments	2			(1		)	—			1
	Accrual balances at June 27, 2014	$	2		$	12		$	—		$	14
	Of the accrued restructuring balance of approximately $14 million at June 27, 2014, $7 million is included in Accrued expenses and $7 million is included in Other non-current liabilities in the Company's Consolidated Balance Sheet. Of the accrued restructuring balance of approximately $17 million at June 28, 2013, $6 million is included in Accrued expenses and $11 million is included in Other non-current liabilities in the Company's Consolidated Balance Sheet.

Debt

Debt	12 Months Ended
	Jun. 27, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	Short-Term Borrowings
	On January 18, 2011, the Company, and its subsidiary Seagate HDD Cayman entered into a Credit Agreement which provided for a $350 million senior secured revolving credit facility (the "Revolving Credit Facility"). On April 30, 2013, the Company and Seagate HDD Cayman entered into the Second Amendment to the Credit Agreement which increased the commitments available under the Revolving Credit Facility from $350 million to $500 million. The loans made under the Credit Agreement will bear interest at a rate of LIBOR plus a variable margin that will be determined based on the corporate credit rating of the Company. The Company and certain of its material subsidiaries fully and unconditionally guarantee the Revolving Credit Facility. The Revolving Credit Facility matures in April 2018, and is available for cash borrowings and for the issuance of letters of credit up to a sub-limit of $75 million. As of June 27, 2014, no borrowings have been drawn under the Revolving Credit Facility, or were utilized for letters of credit.
	Long-Term Debt
	$600 million Aggregate Principal Amount of 6.8% Senior Notes due October 2016 (the "2016 Notes"). On September 20, 2006, the Company's subsidiary, Seagate Technology HDD Holdings, completed the sale of $600 million aggregate principal amount of the 2016 Notes, in a private placement exempt from the registration requirements of the Securities Act of 1933, as amended. The interest on the 2016 Notes is payable semi-annually on April 1 and October 1 of each year. The issuer under the 2016 Notes is Seagate HDD Cayman, and the obligations under the 2016 Notes are unconditionally guaranteed by certain of the Company’s significant subsidiaries. The 2016 Notes are redeemable at the option of the Company in whole or in part, on not less than 30, nor more than 60 days notice, at a "make-whole" premium redemption price. The "make-whole" redemption price will be equal to the greater of (1) 100% of the principal amount of the notes being redeemed, or (2) the sum of the present values of the remaining scheduled payments of principal and interest on the 2016 Notes being redeemed, discounted at the redemption date on a semi-annual basis at a rate equal to the sum of the applicable Treasury rate plus 50 basis points. During fiscal year 2013, the Company repurchased $265 million aggregate principal amount of its 2016 Notes for cash at a premium to their principal amount, plus accrued and unpaid interest, and recorded a loss on the repurchase of approximately $44 million, which is included in Other, net in the Company's Consolidated Statements of Operations.
	$800 million Aggregate Principal Amount of 3.75% Senior Notes due November 2018 (the “Notes”). On November 5, 2013, Seagate HDD Cayman, issued $800 million in aggregate principal amount of 3.75% Senior Notes, which mature on November 15, 2018, in a private placement. The interest on the Notes is payable semi-annually on May 15 and November 15 of each year. The Notes are redeemable at the option of Seagate HDD Cayman in whole or in part, on not less than 30, nor more than 60 days' notice, at a “make-whole” premium redemption price. The “make-whole” premium redemption price will be equal to the greater of (1) 100% of the principal amount of the notes being redeemed, or (2) the sum of the present values of the remaining schedule payments of principal and interest on the Notes being redeemed, discounted at the redemption date on a semi-annual basis at a rate equal to the sum of the applicable Treasury rate plus 50 basis points. Accrued and unpaid interest, if any will be paid to, but excluding, the redemption date. The Notes are fully and unconditionally guaranteed by the Company on a senior unsecured basis. Seagate HDD Cayman and the Company are required to exchange the Notes for notes registered under the Securities Act of 1933, as amended, by January 30, 2015 if the Notes have not otherwise become freely transferable by that time.
	$750 million Aggregate Principal Amount of 7.75% Senior Notes due December 2018 (the "2018 Notes"). On December 14, 2010, the Company's subsidiary, Seagate HDD Cayman, completed the sale of $750 million aggregate principal amount of the 2018 Notes in a private placement exempt from the registration requirements of the Securities Act of 1933, as amended. During fiscal years 2014 and 2013, the Company repurchased $193 million and $513 million in aggregate principal amounts of its 2018 Notes, respectively, for cash at a premium to their principal amount, plus accrued and unpaid interest. During fiscal year 2014, the Company redeemed $44 million in aggregate principal amount of its 2018 Notes, for cash at a premium of its principal amount, plus accrued and unpaid interest. During fiscal years 2014 and 2013, the Company recorded losses on the repurchase and redemption of approximately $20 million and $75 million, respectively, which are included in Other, net in the Company’s Consolidated Statements of Operations. As of June 27, 2014, the 2018 Notes were fully extinguished.
	$600 million Aggregate Principal Amount of 6.875% Senior Notes due May 2020 (the "2020 Notes").   On May 13, 2010, the Company's subsidiary, Seagate HDD Cayman, completed the sale of $600 million aggregate principal amount of the 2020 Notes, in a private placement exempt from the registration requirements of the Securities Act of 1933, as amended. The obligations under the 2020 Notes are fully and unconditionally guaranteed, on a senior unsecured basis, by the Company. The interest on the 2020 Notes is payable semi-annually on May 1 and November 1 of each year. The 2020 Notes are redeemable any time prior to May 1, 2015 at the option of the Company, in whole or in part, at a redemption price of 100% of the principal amount plus an “applicable premium” and accrued and unpaid interest, if any, to the redemption date. The "applicable premium" will be equal to the greater of (1) 1% of the principal amount of the 2020 Notes, or (2) the excess, if any, of (a) the present value of the redemption price on May 1, 2015 plus interest payments due through May 1, 2015, discounted at the applicable Treasury rate as of the redemption date plus 50 basis points; over (b) the principal amount of such note. The 2020 Notes are redeemable at any time on or after May 1, 2015 at various prices expressed as a percentage of principal amount, as set forth in the indentures, plus accrued and unpaid interest, if any, to the redemption date. The issuer under the 2020 Notes is Seagate HDD Cayman, and the obligations under the 2020 Notes are fully and unconditionally guaranteed, on a senior unsecured basis, by the Company. During fiscal year 2014, the Company repurchased $66 million aggregate principal amount of its 2020 Notes for cash at a premium to their principal amount, plus accrued and unpaid interest. The Company recorded a loss on the repurchase of approximately $7 million, which is included in Other, net in the Company's Consolidated Statement of Operations.
	$600 million Aggregate Principal Amount of 7.00% Senior Notes due November 2021 (the "2021 Notes"). On May 18, 2011, the Company's subsidiary, Seagate HDD Cayman, completed the sale of $600 million aggregate principal amount of the 2021 Notes, in a private placement exempt from the registration requirements of the Securities Act of 1933, as amended. The obligations under the 2021 Notes are fully and unconditionally guaranteed, on a senior unsecured basis, by the Company.  The interest on the 2021 Notes is payable semi-annually on January 1 and July 1 of each year. The 2021 Notes are redeemable any time prior to May 1, 2016 at the option of the Company, in whole or in part, at a redemption price of 100% of the principal amount plus an “applicable premium” and accrued and unpaid interest, if any, to the redemption date. The "applicable premium" will be equal to the greater of (1) 1% of the principal amount of the 2021 Notes, or (2) the excess, if any, of (a) the present value of the redemption price on May 1, 2016 plus interest payments due through May 1, 2016, discounted at the applicable Treasury rate as of the redemption date plus 50 basis points; over (b) the principal amount of such note. The 2021 Notes are redeemable at any time on or after May 1, 2016 at various prices expressed as a percentage of principal amount, as set forth in the indentures, plus accrued and unpaid interest, if any, to the redemption date. In addition, any time before May 1, 2014, the Company may redeem up to 35% of the principal amount with the net cash proceeds from permitted sales of the Company's stock at a redemption price of 107% of the principal amount plus accrued interest to the redemption date. The issuer under the 2021 Notes is Seagate HDD Cayman and the obligations under the 2021 Notes are fully and unconditionally guaranteed, on a senior unsecured basis, by the Company. During fiscal year 2014, the Company repurchased $349 million aggregate principal amount of its 2021 Notes for cash at a premium to their principal amount, plus accrued and unpaid interest. The Company recorded a loss on the repurchase of approximately $54 million, which is included in Other, net in the Company's Condensed Consolidated Statement of Operations.
	$1 billion Aggregate Principal Amount of 4.75% Senior Notes due June 1, 2023 (the "2023 Notes"). On May 22, 2013, Seagate HDD Cayman, issued $1 billion in aggregate principal amount of 4.75% Senior Notes, which mature on June 1, 2023, in a private placement with a requirement that if, under certain circumstances, the 2023 Notes have not otherwise become freely transferable by May 26, 2014, then the Company is required to register the 2023 Notes under the Securities Act of 1933, as amended. The obligations under the 2023 Notes are fully and unconditionally guaranteed, on a senior unsecured basis, by the Company. The interest on the 2023 Notes is payable semi-annually on June 1 and December 1 of each year. The 2023 Notes are redeemable at the option of the Company in whole or in part, on not less than 30, nor more than 60 days notice, at a "make-whole" premium redemption price. The "make-whole" redemption price will be equal to the greater of (1) 100% of the principal amount of the notes being redeemed, or (2) the sum of the present values of the remaining scheduled payments of principal and interest on the 2023 Notes being redeemed, discounted at the redemption date on a semi-annual basis at a rate equal to the sum of the applicable Treasury rate plus 50 basis points. Accrued and unpaid interest, if any, will be paid to, but excluding, the redemption date.
	$1 billion in aggregate principal amount of 4.75% Senior Notes due 2025 (the “Notes”). On May 28, 2014, Seagate HDD Cayman issued $1 billion in aggregate principal amount of 4.75% Senior Notes due 2025 (the “Notes”), which mature on January 1, 2025. The interest on the Notes will be payable in cash semiannually on January 1 and July 1 of each year, commencing on January 1, 2015. The Notes are redeemable at any time, upon not less than 30 nor more than 60 days’ notice, Seagate HDD may redeem some or all of the Notes at a ‘‘make-whole’’ redemption price. The ‘‘make-whole’’ redemption price will be equal to the greater of (1) 100% of the principal amount of the Notes redeemed, and (2) the sum of the present values of the remaining scheduled payments of principal and interest on the Notes being redeemed, discounted to the redemption date on a semi-annual basis at a rate equal to the sum of the Treasury Rate plus 50 basis points. Accrued and unpaid interest, if any, will be paid to, but excluding, the redemption date. The Notes are fully and unconditionally guaranteed by the Company on a senior unsecured basis. Seagate HDD Cayman and the Company are required to exchange the Notes for notes registered under the Securities Act of 1933.
	Other As part of our acquisition of LaCie S.A. during fiscal year 2013, long-term debt of $6 million was assumed. During fiscal year 2014, the long-term debt was fully repaid.
	At June 27, 2014, future principal payments on long-term debt were as follows (in millions):
	Fiscal Year	Amount
	2015	$	—
	2016	—
	2017	335
	2018	—
	2019	800
	Thereafter	2,785
		$	3,920

Income_Taxes

Income Taxes	12 Months Ended
	Jun. 27, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The (benefit from) provision for income taxes consisted of the following:
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Current tax expense (benefit):
	U.S. Federal	$	(12	)	$	3		$	—
	U.S. State	3			10			(2		)
	Non-U.S.	62			50			50
	Total Current	53			63			48
	Deferred tax expense (benefit):
	U.S. Federal	(43		)	(49		)	(30		)
	U.S. State	2			(1		)	2
	Non-U.S.	(26		)	(20		)	—
	Total Deferred	(67		)	(70		)	(28		)
	(Benefit from) provision for income taxes	$	(14	)	$	(7	)	$	20
	Income before income taxes consisted of the following:
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	U.S.	$	149		$	175		$	137
	Non-U.S	1,407			1,656			2,745
		$	1,556		$	1,831		$	2,882
	The Company recorded $0.3 million, $1 million and $6 million of excess tax benefits associated with stock option deductions in fiscal years 2014, 2013 and 2012, respectively.
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The significant components of the Company's deferred tax assets and liabilities were as follows:
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,
		2014			2013
	Deferred tax assets
	Accrued warranty	$	99		$	112
	Inventory valuation accounts	49			55
	Receivable allowance	15			13
	Accrued compensation and benefits	103			107
	Depreciation	140			125
	Restructuring accruals	4			5
	Other accruals and deferred items	39			44
	Net operating losses and tax credit carry-forwards	1,081			1,103
	Other assets	8			6
	Total deferred tax assets	1,538			1,570
	Valuation allowance	(888		)	(989		)
	Net deferred tax assets	650			581
	Deferred tax liabilities
	Unremitted earnings of certain non-U.S. entities	(14		)	(14		)
	Acquisition-related items (DTL)	(19		)	(9		)
	Other liabilities	(2		)	(4		)
	Total deferred tax liabilities	(35		)	(27		)
	Total deferred tax assets	$	615		$	554
	As Reported on the Balance Sheet
	Current assets—deferred income taxes	$	126		$	115
	Non-current assets—deferred income taxes	499			456
	Current liabilities—Accrued expenses	—			(2		)
	Other non-current liabilities	(10		)	(15		)
	Total deferred income taxes	$	615		$	554
	The deferred tax asset valuation allowance decreased by approximately $101 million, $75 million and $82 million, in fiscal years 2014, 2013 and 2012, respectively. The valuation allowance decrease in fiscal year 2014 was primarily due to incremental future taxable income that resulted from acquisition activity.
	At June 27, 2014, the Company recorded $615 million of net deferred tax assets. The realization of these deferred tax assets is primarily dependent on the Company's ability to generate sufficient U.S. and certain non-U.S. taxable income in future periods. Although realization is not assured, the Company's management believes that it is more likely than not that these deferred tax assets will be realized. The amount of deferred tax assets considered realizable, however, may increase or decrease in subsequent periods when the Company reevaluates the underlying basis for its estimates of future U.S. and certain non-U.S. taxable income.
	At June 27, 2014, the Company had U.S. federal, state and non-U.S. tax net operating loss carryforwards of approximately $2.9 billion, $1.8 billion and $112 million, respectively, which will expire at various dates beginning in fiscal year 2016, if not utilized. At June 27, 2014, the Company had U.S. federal and state tax credit carryforwards of $348 million and $81 million, respectively, which will expire at various dates beginning in fiscal year 2016 if not utilized.
	As of June 27, 2014, the use of approximately $376 million and $90 million of the Company's total U.S. net operating loss and tax credit carryforwards, respectively, is subject to an aggregate annual limitation of $46 million pursuant to U.S. tax law.
	For purposes of the tax reconciliation between the provision for income taxes at the statutory rate and the effective tax rate, the Irish statutory rate of 25% was applied as follows:
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Provision (benefit) at statutory rate	$	389		$	458		$	720
	Net U.S. state income tax provision	3			12			(2		)
Permanent differences	3			3			1
Valuation allowance	(100		)	(97		)	(70		)
Non-U.S. losses with no tax benefits	8			27			1
Non-U.S. earnings taxed at less than statutory rate	(313		)	(414		)	(645		)
Other individually immaterial items	(4		)	4			15
(Benefit from) provision for income taxes	$	(14	)	$	(7	)	$	20
A substantial portion of the Company's operations in Malaysia, Singapore, and Thailand operate under various tax holidays and tax incentive programs, which expire in whole or in part at various dates through 2020. Certain of the tax holidays may be extended if specific conditions are met. The net impact of these tax holidays and tax incentive programs was to increase the Company's net income by approximately $289 million in fiscal year 2014 ($0.83 per share, diluted), to increase the Company's net income by approximately $338 million in fiscal year 2013 ($0.89 per share, diluted), and to increase the Company's net income by $504 million in fiscal year 2012 ($1.14 per share, diluted).
Since establishing Irish tax residency in fiscal year 2010, the Company consists of an Irish tax resident parent holding company with various U.S. and non-U.S. subsidiaries that operate in multiple non-Irish taxing jurisdictions. The amount of temporary differences (including undistributed earnings) related to outside basis differences in the stock of non-Irish resident subsidiaries considered indefinitely reinvested outside of Ireland for which Irish income taxes have not been provided as of June 27, 2014 was approximately $2.8 billion. If such amount were remitted to Ireland as a dividend, it is likely that tax at 25% or approximately $700 million would result.
As of June 27, 2014 and June 28, 2013, the Company had approximately $115 million and $157 million, respectively, of unrecognized tax benefits excluding interest and penalties. The amount of unrecognized tax benefits, if recognized, that would impact the effective tax rate is $115 million and $157 million as of June 27, 2014 and June 28, 2013, respectively, subject to certain future valuation allowance reversals.
The following table summarizes the activity related to the Company's gross unrecognized tax benefits:
	Fiscal Years Ended
(Dollars in millions)	June 27,			June 28,			June 29,
	2014			2013			2012
Balance of unrecognized tax benefits at the beginning of the year	$	157		$	135		$	128
Gross increase for tax positions of prior years	10			14			1
Gross decrease for tax positions of prior years	(64		)	(4		)	(3		)
Gross increase for tax positions of current year	13			16			13
Gross decrease for tax positions of current year	—			—			—
Settlements	—			—			—
Lapse of statutes of limitation	(3		)	(5		)	(3		)
Non-U.S. exchange (gain)/loss	2			1			(1		)
Balance of unrecognized tax benefits at the end of the year	$	115		$	157		$	135
It is the Company's policy to include interest and penalties related to unrecognized tax benefits in the provision for taxes on the Consolidated Statements of Operations. During fiscal year 2014, the Company recognized net tax expense for interest and penalties of $8 million as compared to net tax expense for interest and penalties of $2 million during each fiscal year 2013 and fiscal year 2012. As of June 27, 2014, the Company had $27 million of accrued interest and penalties related to unrecognized tax benefits compared to $19 million in fiscal year 2013.
During the 12 months beginning June 28, 2014, the Company expects that its unrecognized tax benefits could be reduced anywhere from $3 million to $50 million as a result of audit settlements and the expiration of certain statutes of limitation.
The Company is subject to taxation in many jurisdictions globally and is required to file U.S. federal, U.S. state and non-U.S. income tax returns. In June, 2014, the Company received the Revenue Agent’s Report and Notices of Proposed Adjustments for its U.S. federal income tax returns for fiscal years 2008, 2009 and 2010. The Company’s China subsidiaries are under examination by the Chinese tax administration for years 2004 through 2012. These examinations may result in proposed adjustments to the income taxes as filed during these periods. The Company believes that it has adequately provided for these matters, but there is a reasonable possibility that an adverse outcome of these examinations could have a material effect on the Company’s financial results. In this case, the Company would consider pursuing all possible remedies available, including appeals, judicial review and competent authority.
The Company is no longer subject to tax examination of U.S. federal income tax returns for years prior to fiscal year 2008. With respect to U.S. state and non-U.S. income tax returns, the Company is generally no longer subject to tax examination for years ending prior to fiscal year 2004. The Company believes it has provided adequately for all reasonable outcomes.

Derivative_Financial_Instrumen

Derivative Financial Instruments

12 Months Ended

Jun. 27, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

'

Derivative Financial Instruments

'

Derivative Financial Instruments

The Company is exposed to foreign currency exchange rate, interest rate, and to a lesser extent, equity price risks relating to its ongoing business operations. The Company enters into foreign currency forward exchange contracts in order to manage the foreign currency exchange rate risk on forecasted expenses denominated in foreign currencies and to mitigate the remeasurement risk of certain foreign currency denominated liabilities. The Company's accounting policies for these instruments are based on whether the instruments are classified as designated or non-designated hedging instruments. The Company records all derivatives in the Consolidated Balance Sheets at fair value. The changes in the fair value of the effective portions of designated cash flow hedges are recorded in Accumulated other comprehensive loss until the hedged item is recognized in earnings. Derivatives that are not designated as hedging instruments and the ineffective portions of cash flow hedges are adjusted to fair value through earnings. The amount of net unrealized losses on cash flow hedges was $1 million as of June 27, 2014 and nil as of June 28, 2013.

The Company dedesignates its cash flow hedges when the forecasted hedged transactions are realized or it is probable the forecasted hedged transactions will not occur in the initially identified time period. At such time, the associated gains and losses deferred in Accumulated other comprehensive loss are reclassified immediately into earnings and any subsequent changes in the fair value of such derivative instruments are immediately reflected in earnings. The Company did not recognize any material net gains or losses related to the loss of hedge designation on discontinued cash flow hedges during fiscal years 2014, 2013, and 2012. As of June 27, 2014, the Company's existing foreign currency forward exchange contracts mature within 12 months. The deferred amount currently recorded in Accumulated other comprehensive loss expected to be recognized into earnings over the next 12 months is immaterial.

The following tables show the total notional value of the Company's outstanding foreign currency forward exchange contracts as of June 27, 2014 and June 28, 2013:

As of June 27, 2014

(Dollars in millions)

Contracts Designated as Hedges

Contracts Not Designated as Hedges

Thai baht

$

—

$

143

British Pound Sterling

25

—

Malaysian Ringitt

9

—

$

34

$

143

As of June 28, 2013

(Dollars in millions)

Contracts Designated as Hedges

Contracts Not Designated as Hedges

Thai baht

$

—

$

20

Singapore dollars

—

—

Chinese renminbi

—

—

Czech koruna

—

—

$

—

$

20

The Company is subject to equity market risks due to changes in the fair value of the notional investments selected by its employees as part of its Non-qualified Deferred Compensation Plan—the Seagate Deferred Compensation Plan (the “SDCP”). In the quarter ended December 27, 2013, the Company entered into a Total Return Swap (“TRS”) in order to manage the equity market risks associated with the SDCP liabilities. The Company pays a floating rate, based on LIBOR plus an interest rate spread, on the notional amount of the TRS. The TRS is designed to substantially offset changes in the SDCP liability due to changes in the value of the investment options made by employees. As of June 27, 2014, the notional investments underlying the TRS amounted to $90 million. The contract term of the TRS is approximately one year and is settled on a monthly basis, therefore limiting counterparty performance risk. The Company did not designate the TRS as a hedge. Rather, the Company records all changes in the fair value of the TRS to earnings to offset the market value changes of the SDCP liabilities.

The following tables show the Company's derivative instruments measured at gross fair value as reflected in the Consolidated Balance Sheets as of June 27, 2014 and June 28, 2013:

As of June 27, 2014

Asset Derivatives

Liability Derivatives

(Dollars in millions)

Balance Sheet

Fair

Balance Sheet

Fair

Location

Value

Location

Value

Derivatives designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

$

3

Accrued expenses

$

—

Derivatives not designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

2

Accrued expenses

—

Total return swap

Other current assets

—

Accrued expenses

—

Total derivatives

$

5

$

—

As of June 28, 2013

Asset Derivatives

Liability Derivatives

(Dollars in millions)

Balance Sheet

Fair

Balance Sheet

Fair

Location

Value

Location

Value

Derivatives designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

$

—

Accrued expenses

$

—

Derivatives not designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

—

Accrued expenses

(1

)

Total derivatives

$

—

$

(1

)

The following tables show the effect of the Company's derivative instruments on the Consolidated Statement of Comprehensive Income and the Consolidated Statements of Operations for the fiscal year ended June 27, 2014:

(Dollars in millions)

Derivatives Designated as Cash Flow Hedges

Amount of

Location of

Amount of

Location of

Amount of

Gain or

Gain or (Loss)

Gain or

Gain or (Loss)

Gain

(Loss)

Reclassified

(Loss)

Recognized in

or (Loss)

Recognized

from

Reclassified

Income on

Recognized in

in OCI on

Accumulated

from

Derivatives

Income

Derivatives

OCI into

Accumulated

(Ineffective

(Ineffective

(Effective

Income

OCI into

Portion and

Portion and

Portion)

(Effective

Income

Amount Excluded

Amount

Portion)

(Effective

from

Excluded from

Portion)

Effectiveness

Effectiveness

Testing)

Testing) (a)

Foreign currency forward exchange contracts

$

(1

)

Cost of revenue

$

—

Cost of revenue

$

—

Derivatives Not Designated as Hedging Instruments

Location of Gain or

Amount of Gain or

(Loss) Recognized in

(Loss) Recognized in

Income on Derivatives

Income on Derivatives

Foreign currency forward exchange contracts

Other, net

$

—

___________________________________

(a)

The amounts of gains or losses recognized in income related to the ineffective portion of the hedging relationships and to the amount excluded from the assessment of hedge effectiveness were immaterial for the fiscal year ended June 27, 2014.

The following tables show the effect of the Company's derivative instruments on the Consolidated Statement of Comprehensive Income and the Consolidated Statements of Operations for the fiscal year ended June 28, 2013:

(Dollars in millions)

Derivatives Designated as Cash Flow Hedges

Amount of

Location of

Amount of

Location of

Amount of

Gain or

Gain or (Loss)

Gain or

Gain or (Loss)

Gain

(Loss)

Reclassified

(Loss)

Recognized in

or (Loss)

Recognized

from

Reclassified

Income on

Recognized in

in OCI on

Accumulated

from

Derivatives

Income

Derivatives

OCI into

Accumulated

(Ineffective

(Ineffective

(Effective

Income

OCI into

Portion and

Portion and

Portion)

(Effective

Income

Amount Excluded

Amount

Portion)

(Effective

from

Excluded from

Portion)

Effectiveness

Effectiveness

Testing)

Testing) (a)

Foreign currency forward exchange contracts

$

—

Cost of revenue

$

—

Cost of revenue

$

—

Derivatives Not Designated as Hedging Instruments

Location of Gain or

Amount of Gain or

(Loss) Recognized in

(Loss) Recognized in

Income on Derivatives

Income on Derivatives

Foreign currency forward exchange contracts

Other, net

$

3

___________________________________

(a)

The amounts of gains or losses recognized in income related to the ineffective portion of the hedging relationships and to the amount excluded from the assessment of hedge effectiveness were immaterial for the fiscal year ended June 28, 2013.

Fair_Value

Fair Value	12 Months Ended
	Jun. 27, 2014
Fair Value Disclosures [Abstract]	'
Fair Value	'
	Fair Value
	Measurement of Fair Value
	Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and it considers assumptions that market participants would use when pricing the asset or liability.
	Fair Value Hierarchy
	A fair value hierarchy is based on whether the market participant assumptions used in determining fair value are obtained from independent sources (observable inputs) or reflects the Company's own assumptions of market participant valuation (unobservable inputs). A financial instrument's categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that may be used to measure fair value:
	Level 1 - Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2 - Quoted prices for identical assets and liabilities in markets that are inactive; quoted prices for similar assets and liabilities in active markets or financial instruments for which significant inputs are observable, either directly or indirectly; or
	Level 3 - Prices or valuations that require inputs that are both unobservable and significant to the fair value measurement.
	The Company considers an active market to be one in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis, and views an inactive market as one in which there are few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate the Company's or the counterparty's non-performance risk is considered in determining the fair values of liabilities and assets, respectively.
	Items Measured at Fair Value on a Recurring Basis
	The following table presents the Company's assets and liabilities that are measured at fair value on a recurring basis, excluding accrued interest components, as of June 27, 2014:
		Fair Value Measurements at Reporting Date Using
	(Dollars in millions)	Quoted		Significant			Significant			Total
		Prices in		Other			Unobservable			Balance
		Active		Observable			Inputs
		Markets for		Inputs			(Level 3)
		Identical		(Level 2)
		Instruments
		(Level 1)
	Assets:
	Money market funds	$	793	$	—		$	—		$	793
	Commercial paper	—		1,261			—			1,261
	U.S. treasuries and agency bonds	—		—			—			—
	Certificates of deposit	—		269			—			269
	Corporate bonds	—		6			—			6
	Other debt securities	—		—			—			—
	Equity securities	—		—			—			—
	Total cash equivalents and short-term investments	793		1,536			—			2,329
	Restricted cash and investments:
	Mutual Funds	—		—			—			—
	Other debt securities	—		4			—			4
	Auction rate securities	—		—			—			—
	Derivative assets	—		5			—			5
	Total assets	$	793	$	1,545		$	—		$	2,338
	Liabilities:
	Derivative liabilities	$	—	$	—		$	—		$	—
	Total return swap	—		—			—			—
	Total liabilities	$	—	$	—		$	—		$	—
		Fair Value Measurements at Reporting Date Using
	(Dollars in millions)	Quoted		Significant			Significant			Total
		Prices in		Other			Unobservable			Balance
		Active		Observable			Inputs
		Markets for		Inputs			(Level 3)
		Identical		(Level 2)
		Instruments
		(Level 1)
	Assets:
	Cash and cash equivalents	$	793	$	1,516		$	—		$	2,309
	Short-term investments	—		20			—			20
	Restricted cash and investments	—		4			—			4
	Other current assets	—		—			—			—
	Other assets, net	—		5			—			5
	Total assets	$	793	$	1,545		$	—		$	2,338
	Liabilities:
	Accrued expenses	$	—	$	—		$	—		$	—
	Total liabilities	$	—	$	—		$	—		$	—
	The following table presents the Company's assets and liabilities that are measured at fair value on a recurring basis, excluding accrued interest components, as of June 28, 2013:
		Fair Value Measurements at Reporting Date Using
	(Dollars in millions)	Quoted		Significant			Significant			Total
		Prices in		Other			Unobservable			Balance
		Active		Observable			Inputs
		Markets for		Inputs			(Level 3)
		Identical		(Level 2)
Instruments
(Level 1)
Assets:
Money market funds	$	787	$	—		$	—		$	787
Commercial paper	—		655			—			655
U.S. treasuries and agency bonds	—		96			—			96
Certificates of deposit	—		149			—			149
Corporate bonds	—		211			—			211
Other debt securities	—		106			—			106
Equity securities	4		—			—			4
Total cash equivalents and short-term investments	791		1,217			—			2,008
Restricted Cash and Investments:
Mutual Funds	74		—			—			74
Other debt securities	22		5			—			27
Auction rate securities	—		—			15			15
Derivative assets	—		—			—			—
Total assets	$	887	$	1,222		$	15		$	2,124
Liabilities:
Derivative liabilities	$	—	$	(1	)	$	—		$	(1	)
Total liabilities	$	—	$	(1	)	$	—		$	(1	)
	Fair Value Measurements at Reporting Date Using
(Dollars in millions)	Quoted		Significant			Significant			Total
	Prices in		Other			Unobservable			Balance
	Active		Observable			Inputs
	Markets for		Inputs			(Level 3)
	Identical		(Level 2)
	Instruments
	(Level 1)
Assets:
Cash and cash equivalents	$	787	$	741		$	—		$	1,528
Short-term investments	4		476			—			480
Restricted cash and investments	96		5			—			101
Other current assets	—		—			—			—
Other assets, net	—		—			15			15
Total assets	$	887	$	1,222		$	15		$	2,124
Liabilities:
Accrued expenses	$	—	$	(1	)	$	—		$	(1	)
Total liabilities	$	—	$	(1	)	$	—		$	(1	)
The Company classifies items in Level 1 if the financial assets consist of securities for which quoted prices are available in an active market.
The Company classifies items in Level 2 if the financial asset or liability is valued using observable inputs. The Company uses observable inputs including quoted prices in active markets for similar assets or liabilities. Level 2 assets include: agency bonds, corporate bonds, commercial paper, municipal bonds, and U.S. Treasuries. These debt investments are priced using observable inputs and valuation models which vary by asset class. The Company uses a pricing service to assist in determining the fair values of all of its cash equivalents and short-term investments. For the cash equivalents and short-term investments in the Company's portfolio, multiple pricing sources are generally available. The pricing service uses inputs from multiple industry standard data providers or other third party sources and various methodologies, such as weighting and models, to determine the appropriate price at the measurement date. The Company corroborates the prices obtained from the pricing service against other independent sources and, as of June 27, 2014, has not found it necessary to make any adjustments to the prices obtained. The Company's derivative financial instruments are also classified within Level 2. The Company's derivative financial instruments consist of foreign currency forward exchange contracts. The Company recognizes derivative financial instruments in its consolidated financial statements at fair value. The Company determines the fair value of these instruments by considering the estimated amount it would pay or receive to terminate these agreements at the reporting date.
As of June 27, 2014, we had no Level 3 assets due to the sale of our auction rate securities. As of June 28, 2013, the Company's Level 3 assets consisted of auction rate securities with a par value of $17 million, all of which were collateralized by student loans guaranteed by the Federal Family Education Loan Program. Beginning in fiscal year 2008, these securities failed to settle at auction and continued to fail until they were all sold in the fourth quarter of fiscal year 2014. Since there was no active market for these securities, the Company valued them using a discounted cash flow model. The valuation model was based on the income approach and reflected both observable and significant unobservable inputs.
The Company's auction rate securities were measured at fair value on a recurring basis, excluding accrued interest components, using significant unobservable inputs (Level 3). The fair value of the Company's auction rate securities for the fiscal year ended June 28, 2013 totaled $15 million.
Items Measured at Fair Value on a Non-Recurring Basis
The Company enters into certain strategic investments for the promotion of business and strategic objectives. Strategic investments in equity securities where the Company does not have the ability to exercise significant influence over the investees, included in Other assets, net in the Consolidated Balance Sheets, are recorded at cost and are periodically analyzed to determine whether or not there are indicators of impairment. The carrying value of the Company's strategic investments at June 27, 2014 and June 28, 2013 totaled $46 million and $66 million, respectively, and consisted primarily of privately held equity securities without a readily determinable fair value.
During the fiscal years 2014, 2013 and 2012, the Company determined that certain of its equity investments accounted for under the cost method were other-than-temporarily impaired, and recognized charges of $2 million, $5 million and $7 million, respectively, in order to write down the carrying amount of the investment to its estimated fair value. These amounts were recorded in Other, net in the Consolidated Statements of Operations. Since there was no active market for the equity securities of the investee, the Company estimated fair value of the investee by using the market approach, which was then used to estimate the applicable portion of the fair value of its underlying intellectual property assets.
Other Fair Value Disclosures
The Company's debt is carried at amortized cost. The fair value of the Company's debt is derived using the closing price of the same debt instruments as of the date of valuation, which takes into account the yield curve, interest rates, and other observable inputs.  Accordingly, these fair value measurements are categorized as Level 2. The following table presents the fair value and amortized cost of the Company's debt in order of maturity:
	June 27, 2014					June 28, 2013
(Dollars in millions)	Carrying		Estimated			Carrying			Estimated
	Amount		Fair Value			Amount			Fair Value
6.8% Senior Notes due October 2016	$	335	$	374		$	335		$	370
3.75% Senior Notes due November 2018	800		820			—			—
7.75% Senior Notes due December 2018	—		—			238			259
6.875% Senior Notes due May 2020	534		578			600			644
7.00% Senior Notes due November 2021	251		284			600			645
4.75% Senior Notes due June 2023	1,000		1,009			1,000			938
4.75% Senior Notes due January 2025	1,000		995			—			—
Other	—		—			4			4
	3,920		4,060			2,777			2,860
Less short-term borrowings and current portion of long-term debt	—		—			(3		)	(3		)
Long-term debt, less current portion	$	3,920	$	4,060		$	2,774		$	2,857

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Jun. 27, 2014
Equity [Abstract]	'
Shareholders' Equity	'
	Shareholders' Equity
	Share Capital
	The Company's authorized share capital is $13,500 and consists of 1,250,000,000 ordinary shares, par value $0.00001, of which 326,539,322 shares were outstanding as of June 27, 2014, and 100,000,000 preferred shares, par value $0.00001, of which none were issued or outstanding as of June 27, 2014.
	Ordinary shares - Holders of ordinary shares are entitled to receive dividends when and as declared by the Company's board of directors (the "Board of Directors"). Upon any liquidation, dissolution, or winding up of the Company, after required payments are made to holders of preferred shares, any remaining assets of the Company will be distributed ratably to holders of the preferred and ordinary shares. Holders of shares are entitled to one vote per share on all matters upon which the ordinary shares are entitled to vote, including the election of directors.
	Preferred shares - The Company may issue preferred shares in one or more series, up to the authorized amount, without shareholder approval. The Board of Directors is authorized to establish from time to time the number of shares to be included in each series, and to fix the rights, preferences and privileges of the shares of each wholly unissued series and any of its qualifications, limitations or restrictions. The Board of Directors can also increase or decrease the number of shares of a series, but not below the number of shares of that series then outstanding, without any further vote or action by the shareholders.
	The Board of Directors may authorize the issuance of preferred shares with voting or conversion rights that could harm the voting power or other rights of the holders of the ordinary shares. The issuance of preferred shares, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring or preventing a change in control of the Company and might harm the market price of its ordinary shares and the voting and other rights of the holders of ordinary shares.
	Repurchases of Equity Securities
	On February 1, 2010, the Company announced that its Board of Directors authorized an Anti-Dilution Share Repurchase Program (the “January 2010 Anti-Dilution Share Repurchase Program”). The repurchase program authorizes the Company to repurchase its ordinary shares to offset increases in diluted shares, such as those caused by employee stock plans and convertible debt, used in the determination of diluted net income per share. There was no minimum or maximum number of shares to be repurchased. On April 26, 2012, the Board of Directors authorized the Company to terminate the January 2010 Anti-Dilution Share Repurchase Program, which was so terminated effective April 26, 2012.
	On November 29, 2010, the Company's Board of Directors authorized repurchases of up to an additional $2 billion of the Company's outstanding ordinary shares.
	On January 25, 2012, the Board of Directors authorized the Company to repurchase an additional $1 billion of its outstanding ordinary shares.
	On April 26, 2012, the Board of Directors authorized the Company to repurchase an additional $2.5 billion of its outstanding ordinary shares.
	On July 24, 2013, the Board of Directors authorized the Company to repurchase an additional $2.5 billion of its outstanding ordinary shares.
	All repurchases are effected as redemptions in accordance with the Company's Articles of Association.
	As of June 27, 2014, $1.5 billion remained available for repurchase under the existing repurchase authorization limit.
	The following table sets forth information with respect to repurchases of the Company's ordinary shares during fiscal year 2014, 2013 and 2012:
	(In millions)	Number of	Dollar Value
		Shares	of Shares
		Repurchased	Repurchased
	Cumulative repurchased through July 1, 2011	89	$	1,406
	Repurchased in fiscal year 2012 (a)	101	2,426
	Cumulative repurchased through June 29, 2012	190	3,832
	Repurchased in fiscal year 2013	54	1,654
	Cumulative repurchased through June 28, 2013	244	5,486
	Repurchased in fiscal year 2014	41	1,912
	Cumulative repurchased through June 27, 2014	285	$	7,398
	__________________________________
	(a) Includes 21 million shares of repurchases for $305 million under the January 2010 Anti-Dilution Share Repurchase Program.

Compensation

Compensation	12 Months Ended
	Jun. 27, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Compensation	'
	Compensation
	Stock-Based Compensation Plans
	The Company's stock-based compensation plans have been established to promote the Company's long-term growth and financial success by providing incentives to its employees, directors, and consultants through grants of share-based awards. The provisions of the Company's stock-based benefit plans, which allow for the grant of various types of equity-based awards, are also intended to provide greater flexibility to maintain the Company's competitive ability to attract, retain and motivate participants for the benefit of the Company and its shareholders.
	Seagate Technology plc 2012 Equity Incentive Plan (the “EIP”). On October 26, 2011, the shareholders approved the EIP and authorized the issuance of up to a total of 27.0 million ordinary shares, par value $0.0001 per share, plus any shares remaining available for grant under the Seagate Technology plc 2004 Share Compensation Plan (the "SCP") as of the effective date of the EIP (which was equal to 11.0 million ordinary shares as of the effective date of the EIP and which will increase by such additional number of shares as will be returned to the share reserve in respect of awards previously granted under the SCP) (together, the “Share Reserve”). Any shares that are subject to options or share appreciation rights granted under the EIP will be counted against the Share Reserve as one share for every one share granted, and any shares that are subject to restricted share bonus awards, restricted share units, performance share bonus awards or performance share awards (collectively, “Full-Value Share Awards”) will generally be counted against the Share Reserve as two and one-tenth shares for every one share granted. As of June 27, 2014, there were approximately 15.7 million ordinary shares available for issuance under the EIP.
	Seagate Technology plc 2004 Share Compensation Plan (the "SCP").  A maximum of 63.5 million ordinary shares were issuable under the SCP, including 10.0 million authorized for issuance of share awards and restricted units. On November 4, 2011, the Company filed Post-Effective Amendment No. 1 to deregister 11.0 million ordinary shares that remained available for grant as of October 27, 2011 under the SCP and no shares have been granted from the SCP subsequent to that date.
	Seagate Technology plc Stock Purchase Plan (the "ESPP").  There are 50.0 million ordinary shares authorized to be issued under the ESPP. In no event shall the total number of shares issued under the ESPP exceed 75.0 million ordinary shares. The ESPP consists of a six-month offering period with a maximum issuance of 1.5 million ordinary shares per offering period. The ESPP permits eligible employees to purchase ordinary shares through payroll deductions generally at 85% of the fair market value of the ordinary shares. As of June 27, 2014 there were approximately 10.2 million ordinary shares available for issuance under the ESPP.
	i365, Inc. 2010 Equity Incentive Plan (the "i365 Plan"). In October 2010, i365, Inc. (“i365”), a wholly owned subsidiary of the Company, adopted the i365, Inc. 2010 Equity Incentive Plan (the “i365 Plan”). A maximum of 5.0 million shares of i365's common stock are issuable under the i365 Plan. Options granted to employees generally vest as follows: 25% of the options on the first anniversary of the vesting commencement date and the remaining 75% proportionately each month over the next 36 months. Options expire ten years from the date of grant. The compensation expense associated with options granted to date under the i365 Plan was not material for fiscal years 2014, 2013, and 2012, respectively.
	LyveMinds Inc. 2012 Equity Incentive Plan (the "LyveMinds Plan").  On October 19, 2012, LyveMinds Inc., a majority-owned subsidiary of the Company, adopted the LyveMinds Inc. 2012 Equity Incentive Plan (the "LyveMinds Plan"). A maximum of 31.9 million shares of LyveMinds' common stock are issuable under the LyveMinds Plan to employees, directors, and consultants of Lyve Minds. Options granted to LyveMinds employees generally vest as follows: 25% of the options on the first anniversary of the vesting commencement date and the remaining 75% proportionately each month over the next 36 months. Options expire ten years from the date of grant. LyveMinds, Inc. adopted the Amended and Restated 2012 Equity Incentive Plan on March 26, 2014 in connection with LyveMinds' reincorporation as a Delaware corporation. The compensation expense associated with options granted to date under the LyveMinds Plan was not material for fiscal years 2014, 2013, and 2012, respectively.
	Equity Awards
	Full-Value Share Awards (e.g. restricted share units) generally vest over a period of three to four years, with cliff vesting of a portion of each award occurring annually. Options generally vest as follows: 25% of the options will vest on the first anniversary of the vesting commencement date and the remaining 75% will vest ratably each month thereafter over the next 36 months. Options granted under the EIP and SCP have an exercise price equal to the closing price of the Company's ordinary shares on date of grant.
	The Company granted performance awards to its senior executive officers under the SCP and the EIP where vesting is subject to both the continued employment of the participant by the Company and the achievement of certain performance goals established by the Compensation Committee of the Company's Board of Directors, including market based performance goals. A single award represents the right to receive a single ordinary share of the Company. During fiscal year 2014, 2013 and 2012, the Company granted 0.4 million, 0.7 million and 0.6 million performance awards, respectively, where performance is measured based on a three-year average return on invested capital (ROIC) goal and a relative total shareholder return (TSR) goal, which is based on the Company's ordinary shares measured against a benchmark TSR of a peer group over the same three-year period (the "TSR/ROIC" awards). These awards vest after the end of the performance period of three years from the grant date. A percentage of these units may vest only if at least the minimum ROIC goal is met regardless of whether the TSR goal is met. The number of stock units to vest will range from 0% to 200% of the targeted units. In evaluating the fair value of these units, the Company used a Monte Carlo simulation on the grant date, taking the market-based TSR goal into consideration. Compensation expense related to these units is only recorded in a period if it is probable that the ROIC goal will be met, and it is to be recorded at the expected level of achievement.
	The Company also granted 0.3 million, 0.3 million and 0.6 million performance awards during fiscal years 2014, 2013 and 2012 respectively, to its senior executive officers which are subject to a performance goal related to the Company's adjusted earnings per share (the "AEPS" awards). These awards have a maximum seven-year vesting period, with 25% annual vesting starting on the first anniversary of the grant date. If the performance goal is not achieved, vesting is delayed to a following year in which the AEPS goal is achieved. Any unvested awards from prior years may vest cumulatively in a future year within the seven-year vesting period if the annual AEPS goal is achieved during a subsequent year. If the AEPS goal has not been met by the end of the seven year period, any unvested shares will be forfeited.
	During fiscal year 2014, the Company did not grant any performance-based options and performance based restricted share units to its CEO. In fiscal year 2013, the Company granted 0.2 million performance-based options and 0.1 million performance-based restricted share units to its CEO which are based on the attainment of a minimum 40% TSR (the "40% TSR" awards).  The 40% TSR awards cliff vest after three years, contingent upon continued service and the attainment of a minimum 40% TSR, inclusive of dividends and share price appreciation, over a three-year performance period, which TSR must be sustained for a minimum of 30 consecutive trading days.
	Determining Fair Value of Seagate Technology Stock Plans
	Valuation and amortization method - The Company estimates the fair value of stock options granted using the Black-Scholes-Merton valuation model and a single option award approach. This fair value is then amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period or the remaining service (vesting) period.
	Expected Term - Expected term represents the period that the Company's stock-based awards are expected to be outstanding and was determined based on historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as influenced by changes to the terms of its stock-based awards.
	Expected Volatility - The Company uses a combination of the implied volatility of its traded options and historical volatility of its share price.
	Expected Dividend - The Black-Scholes-Merton valuation model calls for a single expected dividend yield as an input. The dividend yield is determined by dividing the expected per share dividend during the coming year by the grant date share price. The expected dividend assumption is based on the Company's current expectations about its anticipated dividend policy. Also, because the expected dividend yield should reflect marketplace participants' expectations, the Company does not incorporate changes in dividends anticipated by management unless those changes have been communicated to or otherwise are anticipated by marketplace participants.
	Risk-Free Interest Rate - The Company bases the risk-free interest rate used in the Black-Scholes-Merton valuation model on the implied yield currently available on U.S. Treasury zero-coupon issues with an equivalent remaining term. Where the expected term of the Company's stock-based awards do not correspond with the terms for which interest rates are quoted, the Company performed a straight-line interpolation to determine the rate from the available term maturities.
	Fair Value - The fair value of the Company's nonvested awards and performance awards subject to an AEPS condition for fiscal years 2014, 2013, and 2012, is the price of the Company's shares on the grant date. The weighted average grant date fair value of awards granted are as follows:
		Fiscal Years
		2014			2013			2012
	Nonvested awards:
	Weighted-average fair value	$	41.18		$	30.26		$	13.14
	Performance awards:
	Weighted-average fair value	$	48.69		$	30.01		$	11.16
	The fair value of the Company's shares related to options granted to employees, shares issued from the ESPP and performance awards subject to TSR/ROIC conditions for fiscal years 2014, 2013, and 2012 were estimated using the following assumptions:
		Fiscal Years
		2014			2013			2012
	Options
	Expected term (in years)	4.2			4.2			4.2
	Volatility	35 - 41%			41 - 53%			49 - 53%
	Weighted-average volatility	40		%	52		%	50		%
	Expected dividend rate	3.1% - 3.8%			3.6 - 5.8%			3.8 - 6.5%
	Weighted-average expected dividend rate	3.7		%	4.4		%	5.9		%
	Risk-free interest rate	1.2 - 1.4%			0.5 - 1.1%			0.6 - 0.9%
	Weighted-average fair value	$	10.41		$	8.96		$	3.61
	ESPP
	Expected term (in years)	0.5			0.5			0.5
	Volatility	34 - 36%			38 - 46%			45 - 54%
	Weighted-average volatility	35		%	42		%	49		%
	Expected dividend rate	3.3 - 3.5%			2.2 - 4.2%			3.9 - 5.2%
	Weighted-average expected dividend rate	3.4		%	3.2		%	4.7		%
	Risk-free interest rate	0.1		%	0.1		%	0.1 - 0.2%
	Weighted-average fair value	$	10.46		$	7.74		$	4.89
	Performance restricted share awards subject to market condition
	Expected term (in years)	3			2.98			2.96
	Weighted-average volatility	46		%	48		%	65		%
	Expected dividend rate	3.80%			4.3		%	6.4		%
	Risk-free interest rate	0.90%			0.3		%	0.3		%
	Weighted-average fair value	$	37.51		$	26.41		$	10.05
	Stock Compensation Expense
	The Company recorded $118 million, $76 million and $51 million of share-based compensation during fiscal years 2014, 2013, and 2012, respectively. Management has made an estimate of expected forfeitures and is recognizing compensation costs only for those equity awards expected to vest. When estimating forfeitures, the Company considers voluntary termination behavior as well as analysis of actual forfeited awards.
	Stock Option Activity
	The Company issues new ordinary shares upon exercise of stock options. The following is a summary of option activities:
	Options		Number of		Weighted-			Weighted-		Aggregate
			Shares		Average			Average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual
								Term
			(In millions)					(In years)		(Dollars In millions)
	Outstanding at June 28, 2013		9.5		$	14.6		3.8		$	286
	Granted		0.9		$	42.54
Exercised		(3.9	)	$	12.64
Forfeitures		(0.1	)	$	23.37
Expirations		—		$	—
Outstanding at June 27, 2014		6.4		$	19.8		3.8		$	238
Vested and expected to vest at June 27, 2014		6.2		$	19.4		3.8		$	231
Exercisable at June 27, 2014		3.5		$	11.56		2.6		$	157
The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company's ordinary shares for the options that were in-the-money at June 27, 2014. During fiscal years 2014, 2013, and 2012, the aggregate intrinsic value of options exercised under the Company's stock option plans was $140 million, $272 million and $245 million, respectively, determined as of the date of option exercise. The aggregate fair value of options vested during fiscal year 2014 was approximately $12 million.
At June 27, 2014, the total compensation cost related to options granted to employees but not yet recognized was approximately $20 million, net of estimated forfeitures of approximately $1 million. This cost is being amortized on a straight-line basis over a weighted-average remaining term of approximately 2.4 years and will be adjusted for subsequent changes in estimated forfeitures.
Nonvested Awards Activity
The following is a summary of nonvested award activities which do not contain a performance condition:
Nonvested Awards		Number of		Weighted-
		Shares		Average
				Grant-
				Date
				Fair Value
		(In millions)
Nonvested at June 28, 2013		5.4		$	22.07
Granted		3.5		$	41.18
Forfeitures		(0.2	)	$	28.69
Vested		(1.7	)	$	20.36
Nonvested at June 27, 2014		7		$	32.05
At June 27, 2014, the total compensation cost related to nonvested awards granted to employees but not yet recognized was approximately $164 million, net of estimated forfeitures of approximately $11 million. This cost is being amortized on a straight-line basis over a weighted-average remaining term of 2.8 years and will be adjusted for subsequent changes in estimated forfeitures. The aggregate fair value of nonvested awards vested during fiscal year 2014 was approximately $73 million.
Performance Awards
The following is a summary of nonvested award activities which contain a performance condition:
Performance Awards		Number of		Weighted-
		Shares		Average
				Grant-
				Date
				Fair Value
		(In millions)
Performance units at June 28, 2013		2.6		$	18.44
Granted		0.7		$	42.5
Forfeitures		—		$	—
Vested		(0.6	)	$	14.55
Performance units at June 27, 2014		2.7		$	25.43
At June 27, 2014, the total compensation cost related to performance awards granted to employees but not yet recognized was approximately $52 million. This cost is being amortized on a straight-line basis over a weighted-average remaining term of 3.0 years.
ESPP
During fiscal years 2014, 2013 and 2012, the aggregate intrinsic value of shares purchased under the Company's ESPP was approximately $26 million, $17 million and $17 million respectively. At June 27, 2014, the total compensation cost related to options to purchase the Company's ordinary shares under the ESPP but not yet recognized was approximately $1.6 million. This cost will be amortized on a straight-line basis over a weighted-average period of approximately one month. During fiscal year 2014, the Company issued 1.7 million ordinary shares with a weighted-average purchase price of $31.95 per share.
Tax-Deferred Savings Plan
The Company has a tax-deferred savings plan, the Seagate 401(k) Plan (the "40l(k) plan"), for the benefit of qualified employees. The 40l(k) plan is designed to provide employees with an accumulation of funds at retirement. Qualified employees may elect to make contributions to the 401(k) plan on a bi-weekly basis. Pursuant to the 401(k) plan, the Company matches 50% of employee contributions, up to 6% of compensation, subject to maximum annual contributions of $4,500 per participating employee. During fiscal years 2014, 2013, and 2012, the Company made matching contributions of $16 million, $14 million and $13 million, respectively.
Deferred Compensation Plan
On January 1, 2001, the Company adopted the SDCP for the benefit of eligible employees. This plan is designed to permit certain discretionary employer contributions, in excess of the tax limits applicable to the 401(k) plan and to permit employee deferrals in excess of certain tax limits. In the quarter ended December 27, 2013, the Company entered into a Total Return Swap (“TRS”) in order to manage the equity market risks associated with the SDCP liabilities. See "Note 8. Derivative Financial Instruments" contained in this report for additional information about the TRS.
Through the second quarter of fiscal year 2014, the Company's assets designated to pay benefits under the plan were held by a rabbi trust. The assets and liabilities of a rabbi trust were accounted for as assets and liabilities of the Company. As of June 28, 2013, the assets held in the rabbi trust were approximately $79 million and were included in Restricted cash and investments in the Consolidated Balance Sheets. The deferred compensation obligation related to the rabbi trust included in Accrued expenses on the accompanying Consolidated Balance Sheets was approximately $87 million as of June 28, 2013.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Jun. 27, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	The following table sets forth the computation of basic and diluted net income per share:
		Fiscal Years Ended
	(In millions, except per share data)	June 27, 2014			June 28,			June 29,
					2013			2012
	Numerator:
	Net income attributable to Seagate Technology plc	$	1,570		$	1,838		$	2,862
	Number of shares used in per share calculations:
	Total shares for purposes of calculating basic net income per share attributable to Seagate Technology plc	337			370			426
	Weighted-average effect of dilutive securities:
	Employee equity award plans	10			12			15
	Total shares for purpose of calculating diluted net income per share attributable to Seagate Technology plc	347			382			441
	Net income per share attributable to Seagate Technology plc shareholders:
	Basic	$	4.66		$	4.97		$	6.72
	Diluted	$	4.52		$	4.81		$	6.49
	The following potential shares were excluded from the computation of diluted net income per share as their effect would have been anti-dilutive:
		Fiscal Years Ended
	(In millions)	June 27,		June 28,			June 29,
		2014		2013			2012
	Employee equity award plans	—		—			7

Business_Segment_and_Geographi

Business Segment and Geographic Information	12 Months Ended
	Jun. 27, 2014
Segment Reporting [Abstract]	'
Business Segment and Geographic Information	'
	Business Segment and Geographic Information
	The Company has concluded that its manufacture and distribution of disk drives constitutes one reporting segment. The Company's manufacturing operations are based on technology platforms that are used to produce various disk drive products that serve multiple disk drive applications and markets. The Company's main technology platforms are primarily focused around areal density of media and read/write head technologies. In addition, the Company also invests in certain other technology platforms including motors, servo formatting read/write channels, solid state and other technologies. The Company has determined that its Chief Executive Officer is the Company's chief operating decision maker (CODM) as he is responsible for reviewing and approving investments in the Company's technology platforms and manufacturing infrastructure.
	In fiscal years 2014, 2013 and 2012, Dell Inc. accounted for approximately 13%, 13% and 15% of consolidated revenue, respectively, while Hewlett-Packard Company accounted for approximately 13%, 10% and 14% of consolidated revenue, respectively. No other customer accounted for more than 10% of consolidated revenue in any year presented.
	Other long-lived assets consist of property, equipment and leasehold improvements, other intangible assets, capital leases, equity investments and other non-current assets as recorded by the Company's operations in each area.
	The following table summarizes the Company's operations by geographic area:
			Fiscal Years Ended
	(In millions)		June 27,		June 28,		June 29,
			2014		2013		2012
	Revenue from external customers (a):
	Singapore		$	6,828	$	7,429	$	7,847
	United States		3,679		3,620		3,845
	The Netherlands		2,652		2,804		3,089
	Other		565		498		158
	Consolidated		$	13,724	$	14,351	$	14,939
	Long-lived assets:
	Singapore		$	788	$	881	$	868
	Thailand		398		398		409
	United States		500		427		318
	China		167		212		270
	Malaysia		146		129		144
	Other		680		852		928
	Consolidated		$	2,679	$	2,899	$	2,937
	___________________________________
	(a)	Revenue is attributed to countries based on the shipping location.

Legal_Environmental_and_Other_

Legal, Environmental and Other Contingencies	12 Months Ended
	Jun. 27, 2014
Legal, Environmental and Other Contingencies Disclosure [Abstract]	'
Legal, Environmental and Other Contingencies	'
	Legal, Environmental and Other Contingencies
	The Company assesses the probability of an unfavorable outcome of all its material litigation, claims, or assessments to determine whether a liability had been incurred and whether it is probable that one or more future events will occur confirming the fact of the loss. In the event that an unfavorable outcome is determined to be probable and the amount of the loss can be reasonably estimated, the Company establishes an accrual for the litigation, claim or assessment. In addition, in the event an unfavorable outcome is determined to be less than probable, but reasonably possible, the Company will disclose an estimate of the possible loss or range of such loss; however, when a reasonable estimate cannot be made, the Company will provide disclosure to that effect. Litigation is inherently uncertain and may result in adverse rulings or decisions. Additionally, the Company may enter into settlements or be subject to judgments that may, individually or in the aggregate, have a material adverse effect on its results of operations. Accordingly, actual results could differ materially.
	Intellectual Property Litigation
	Convolve, Inc. (“Convolve”) and Massachusetts Institute of Technology (“MIT”) v. Seagate Technology LLC, et al.—On July 13, 2000, Convolve and MIT filed suit against Compaq Computer Corporation and Seagate Technology LLC in the U.S. District Court for the Southern District of New York, alleging infringement of U.S. Patent Nos. 4,916,635 (the “'635 patent”) and U.S. Patent No. 5,638,267 (the “'267 patent”), misappropriation of trade secrets, breach of contract, and other claims. In the complaint, the plaintiffs requested injunctive relief, $800 million in compensatory damages and unspecified punitive damages, including for willful infringement. On January 16, 2002, Convolve filed an amended complaint, alleging defendants infringe US Patent No. 6,314,473 (the “'473 patent”). The district court ruled in 2010 that the '267 patent was out of the case.
	On August 16, 2011, the district court granted in part and denied in part the Company's motion for summary judgment. On July 1, 2013, the U.S. Court of Appeals for the Federal Circuit: 1) affirmed the district court's summary judgment rulings that Seagate did not misappropriate any of the alleged trade secrets and that the asserted claims of the '635 patent are invalid; 2) reversed and vacated the district court's summary judgment of non-infringement with respect to the '473 patent; and 3) remanded the case for further proceedings on the '473 patent. On July 11, 2014, the district court issued its ruling on the Company’s summary judgment motion regarding Convolve’s only remaining cause of action, which alleged infringement of the ‘473 patent; the court granted the motion and directed the clerk of the court to close the case. The court entered judgment in favor of the Company on July 14, 2014. In view of the rulings made by the district court and the Court of Appeals and the uncertainty regarding the amount of damages, if any, that could be awarded Convolve in this matter, the Company does not believe that it is currently possible to determine a reasonable estimate of the possible range of loss related to this matter.
	Alexander Shukh v. Seagate Technology—On February 12, 2010, Alexander Shukh filed a complaint against the Company in the U.S. District Court for the District of Minnesota, alleging, among other things, employment discrimination based on his Belarusian national origin and wrongful failure to name him as an inventor on several patents and patent applications. Mr. Shukh's employment was terminated as part of a company-wide reduction in force in fiscal year 2009. He seeks damages in excess of $75 million. The Company believes the claims are without merit and intends to vigorously defend this case. On March 31, 2014, the district court granted Seagate’s summary judgment motion and entered judgment in favor of Seagate. Mr. Shukh filed a notice of appeal on April 7, 2014. In view of the uncertainty regarding the amount of damages, if any, that could be awarded in this matter, the Company does not believe that it is currently possible to determine a reasonable estimate of the possible range of loss related to this matter.
	LEAP Co., Ltd. v. Seagate Singapore International Headquarters Pte. Ltd. and Nippon Seagate Inc.—On July 4, 2012, LEAP Co., Ltd. filed a lawsuit in the Tokyo District Court of Japan against Seagate Singapore International Headquarters Pte. Ltd., Nippon Seagate Inc. and Buffalo Inc. alleging wrongful termination of purchase agreements and other claims, and seeking approximately $38 million in damages. A date for the start of trial has not yet been scheduled. The Company believes the claims are without merit and intends to vigorously defend this case. In view of the uncertainty regarding the amount of damages, if any, that could be awarded in this matter, the Company does not believe that it is currently possible to determine a reasonable estimate of the possible range of loss related to this matter.
	Realtek Semiconductor Corporation ITC Investigation re Certain Integrated Circuit Chips and Products Containing the Same-On September 19, 2012, Realtek Semiconductor Corporation filed a complaint with the International Trade Commission (“ITC”) seeking an investigation pursuant to Section 337 of the Tariff Act of 1930, as amended (“Section 337”). The complaint names LSI Corporation and Seagate Technology as respondents and alleges infringement of U.S. patents relating to integrated circuit chips that include bond pad structures. Realtek seeks an order to exclude entry of infringing integrated circuit chips and products containing the infringing integrated circuit chips into the U.S. and a cease and desist order. The ITC initiated an investigation on October 18, 2012. On March 21, 2014, the Administrative Law Judge (“ALJ”) issued an Initial Determination in favor of Seagate and LSI. On July 21, 2014, the Commission gave notice that it had determined to affirm in part, reverse in part and vacate in part the ALJ’s Initial Determination; the Commission found that no violation of Section 337 by Seagate or LSI has occurred based on findings that certain of the patent claims at issue were invalid, and that Realtek failed to show the existence of an industry in the U.S. that exploits the patent. In view of the uncertainty regarding the possible outcome of this case and the nature of the relief sought, the Company does not believe that it is currently possible to determine a reasonable estimate of the possible loss or range of loss, or other possible adverse result, if any, that may be incurred with respect to this matter.
	Enova Technology Corporation v. Seagate Technology (US) Holdings, Inc., et al.-On June 5, 2013, Enova Technology Corporation filed a complaint against Seagate Technology (US) Holdings, Inc. and Seagate Technology LLC in the U.S. District Court for the District of Delaware alleging infringement of U.S. Patent No. 7,136,995, “Cryptographic Device,” and U.S. Patent No. 7,900,057, “Cryptographic Serial ATA Apparatus and Method.” The complaint seeks unspecified compensatory damages, enhanced damages, injunctive relief, attorneys' fees, and other relief. The trial is scheduled to begin May 9, 2016. The Company believes the claims are without merit and intends to vigorously defend this case. In view of the uncertainty regarding the amount of damages, if any, that could be awarded in this matter, the Company does not believe that it is currently possible to determine a reasonable estimate of the possible range of loss related to this matter.
	Environmental Matters
	The Company's operations are subject to U.S. and foreign laws and regulations relating to the protection of the environment, including those governing discharges of pollutants into the air and water, the management and disposal of hazardous substances and wastes and the cleanup of contaminated sites. Some of the Company's operations require environmental permits and controls to prevent and reduce air and water pollution, and these permits are subject to modification, renewal and revocation by issuing authorities.
	The Company has established environmental management systems and continually updates its environmental policies and standard operating procedures for its operations worldwide. The Company believes that its operations are in material compliance with applicable environmental laws, regulations and permits. The Company budgets for operating and capital costs on an ongoing basis to comply with environmental laws. If additional or more stringent requirements are imposed on the Company in the future, it could incur additional operating costs and capital expenditures.
	Some environmental laws, such as the Comprehensive Environmental Response Compensation and Liability Act of 1980 (as amended, the “Superfund” law) and its state equivalents, can impose liability for the cost of cleanup of contaminated sites upon any of the current or former site owners or operators or upon parties who sent waste to these sites, regardless of whether the owner or operator owned the site at the time of the release of hazardous substances or the lawfulness of the original disposal activity. The Company has been identified as a potentially responsible party at several sites. At each of these sites, the Company has an assigned portion of the financial liability based on the type and amount of hazardous substances disposed of by each party at the site and the number of financially viable parties. The Company has fulfilled its responsibilities at some of these sites and remains involved in only a few at this time.
	While the Company's ultimate costs in connection with these sites is difficult to predict with complete accuracy, based on its current estimates of cleanup costs and its expected allocation of these costs, the Company does not expect costs in connection with these sites to be material.
	The Company may be subject to various state, federal and international laws and regulations governing the environment, including those restricting the presence of certain substances in electronic products. For example, the European Union (“EU”) enacted the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment, which prohibits the use of certain substances, including lead, in certain products, including disk drives, put on the market after July 1, 2006. Similar legislation has been or may be enacted in other jurisdictions, including in the United States, Canada, Mexico, Taiwan, China, Japan and others. The European Union REACH Directive (Registration, Evaluation, Authorization, and Restriction of Chemicals, EC 1907/2006) also restricts substances of very high concern (“SVHCs”) in products. If the Company or its suppliers fails to comply with the substance restrictions, recycle requirements or other environmental requirements as they are enacted worldwide, it could have a materially adverse effect on the Company's business.
	Other Matters
	The Company is involved in a number of other judicial and administrative proceedings incidental to its business, and the Company may be involved in various legal proceedings arising in the normal course of its business in the future. Although occasional adverse decisions or settlements may occur, the Company believes that the final disposition of such matters will not have a material adverse effect on its financial position or results of operations.

Commitments

Commitments	12 Months Ended
	Jun. 27, 2014
Commitments Disclosure [Abstract]	'
Commitments	'
	Commitments
	Leases. The Company leases certain property, facilities and equipment under non-cancelable lease agreements. Land and facility leases expire at various dates through 2082 and contain various provisions for rental adjustments including, in certain cases, a provision based on increases in the Consumer Price Index. Also, certain leases provide for renewal of the lease at the Company's option at expiration of the lease. All of the leases require the Company to pay property taxes, insurance and normal maintenance costs.
	Future minimum lease payments for operating leases (including accrued lease payments relating to restructuring plans) with initial or remaining terms of one year or more were as follows at June 27, 2014 (lease payments are shown net of sublease income):
	Fiscal Years Ending	Operating Leases
		(Dollars in millions)
	2015	$	42
	2016	31
	2017	21
	2018	15
	2019	22
	Thereafter	69
		$	200
	Total rent expense for all land, facility and equipment operating leases, net of sublease income, was $39 million, $35 million and $34 million for fiscal years 2014, 2013 and 2012, respectively. Total sublease rental income for fiscal years 2014, 2013 and 2012 was $2 million, $4 million and $6 million, respectively. The Company subleases a portion of its facilities that it considers to be in excess of current requirements. As of June 27, 2014, total future lease income to be recognized for the Company's existing subleases is approximately $5 million.
	The Company recorded amounts for both adverse and favorable leasehold interests and for exit costs that apply directly to the lease commitments assumed through the 2006 acquisition of Maxtor. As of June 27, 2014, the Company had a $4 million adverse leasehold interest related to leases acquired from Maxtor. The adverse leasehold interest is being amortized to Cost of revenue and Operating expenses over the remaining duration of the leases. In addition, the Company had $5 million and $9 million remaining in accrued exit costs related to the planned exit of Maxtor leased excess facilities at June 27, 2014 and June 28, 2013, respectively.
	Capital Expenditures.    The Company's non-cancelable commitments for construction of manufacturing and product development facilities and purchases of equipment approximated $189 million at June 27, 2014.
	LSI Asset Acquisition. On May 29, 2014, the Company and Avago Technologies Limited, a leading semiconductor device supplier to the enterprise storage, wired, wireless and industrial end markets, announced that they had entered into a definitive asset purchase agreement under which the Company will acquire the assets of LSI’s Accelerated Solutions Division (“ASD”) and Flash Components Division (“FCD”) from Avago for $450 million in cash. The acquisition strengthens the Company’s strategy to deliver a full suite of storage solutions, by providing it with established Enterprise PCIe flash and SSD controller capabilities to deliver solutions for the growing flash storage market. The transaction is expected to close in the first quarter of fiscal year 2015, subject to the satisfaction of customary closing conditions and the receipt of certain regulatory approvals, including those required by the Hart-Scott-Rodino Antitrust Improvements Act. Because the transaction was pending at the time this Annual Report on Form 10-K was filed with the Securities and Exchange Commission, certain disclosures required by ASC Topic 805 Business Combinations have not been made herein.

Guarantees

Guarantees	12 Months Ended
	Jun. 27, 2014
Guarantees [Abstract]	'
Guarantees	'
	Guarantees
	Indemnifications to Officers and Directors
	On May 4, 2009, Seagate Technology, an exempted company incorporated with limited liability under the laws of the Cayman Islands (“Seagate-Cayman”), then the parent company, entered into a new form of indemnification agreement (the “Revised Indemnification Agreement”) with its officers and directors of Seagate-Cayman and its subsidiaries (each, an “Indemnitee”). The Revised Indemnification Agreement provides indemnification in addition to any of Indemnitee's indemnification rights under Seagate-Cayman's Articles of Association, applicable law or otherwise, and indemnifies an Indemnitee for certain expenses (including attorneys' fees), judgments, fines and settlement amounts actually and reasonably incurred by him or her in any action or proceeding, including any action by or in the right of Seagate-Cayman or any of its subsidiaries, arising out of his or her service as a director, officer, employee or agent of Seagate-Cayman or any of its subsidiaries or of any other entity to which he or she provides services at Seagate-Caymans's request. However, an Indemnitee shall not be indemnified under the Revised Indemnification Agreement for (i) any fraud or dishonesty in the performance of Indemnitee's duty to Seagate-Cayman or the applicable subsidiary of Seagate-Cayman or (ii) Indemnitee's conscious, intentional or willful failure to act honestly, lawfully and in good faith with a view to the best interests of Seagate-Cayman or the applicable subsidiary of Seagate-Cayman. In addition, the Revised Indemnification Agreement provides that Seagate-Cayman will advance expenses incurred by an Indemnitee in connection with enforcement of the Revised Indemnification Agreement or with the investigation, settlement or appeal of any action or proceeding against him or her as to which he or she could be indemnified.
	On July 3, 2010 pursuant to a corporate reorganization, the common shareholders of Seagate-Cayman became ordinary shareholders of Seagate Technology plc (the "Company") and Seagate-Cayman became a wholly owned subsidiary of the Company, as described more fully in the Current Report on Form 8-K filed by the Company on July 6, 2010 (the “Redomestication”). On July 27, 2010, in connection with the Redomestication, the Company, as sole shareholder of Seagate-Cayman, approved a form of deed of indemnity (the “Deed of Indemnity”), which provides for the indemnification by Seagate-Cayman of any director, officer, employee or agent of the Company, Seagate-Cayman or any subsidiary of the Company (each, a “Deed Indemnitee”), in addition to any of a Deed Indemnitee's indemnification rights under the Company's Articles of Association, applicable law or otherwise, with a similar scope to the Revised Indemnification Agreement. Seagate-Cayman entered into the Deed of Indemnity with certain Deed Indemnitees effective as of July 3, 2010 and continues to enter into the Deed of Indemnity with additional Deed Indemnitees from time to time.
	The nature of these indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay on behalf of its officers and directors. Historically, the Company has not made any significant indemnification payments under such agreements and no amount has been accrued in the accompanying consolidated financial statements with respect to these indemnification obligations.
	Intellectual Property Indemnification Obligations
	The Company has entered into agreements with customers and suppliers that include limited intellectual property indemnification obligations that are customary in the industry. These guarantees generally require the Company to compensate the other party for certain damages and costs incurred as a result of third party intellectual property claims arising from these transactions. The nature of the intellectual property indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay to its customers and suppliers. Historically, the Company has not made any significant indemnification payments under such agreements and no amount has been accrued in the accompanying consolidated financial statements with respect to these indemnification obligations.
	Product Warranty
	The Company estimates probable product warranty costs at the time revenue is recognized. The Company generally warrants its products for a period of 1 to 5 years. The Company uses estimated repair or replacement costs and uses statistical modeling to estimate product return rates in order to determine its warranty obligation. Changes in the Company's product warranty liability during the fiscal years ended June 27, 2014, June 28, 2013 and June 29, 2012 were as follows:
		Fiscal Years Ended
	(In millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Balance, beginning of period	$	320		$	363		$	348
	Warranties issued	177			193			169
	Repairs and replacements	(228		)	(276		)	(284		)
	Changes in liability for pre-existing warranties, including expirations	1			37			58
	Warranty liability assumed from acquisitions	3			3			72
	Balance, end of period	$	273		$	320		$	363

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Jun. 27, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	In connection with the Company's acquisition of the Samsung HDD business, Samsung became a shareholder of the Company and appointed one of its executives to the Company's Board of Directors.
	Samsung Electronics Co. Ltd. (“Samsung”) The Company recorded revenue of $216 million, $413 million and $407 million from sales to Samsung for fiscal year 2014, 2013 and 2012, respectively. The Company made payments to Samsung in fiscal years 2014, 2013 and 2012 of $318 million, $393 million and $102 million, respectively, related to purchases of components and services. The Company had accounts payable to Samsung of $34 million and $48 million at June 27, 2014 and June 28, 2013, respectively. The Company had accounts receivable from Samsung of $25 million and $49 million at June 27, 2014 and June 28, 2013, respectively.
	Microsoft Corporation (“Microsoft”) During the years presented (through March 2014), the Company's Chairman and Chief Executive Officer also served on the board of Microsoft. The Company recorded revenue of $208 million, $141 million and $54 million from sales to Microsoft for fiscal years 2014, 2013 and 2012, respectively. The Company made payments to Microsoft in fiscal years 2014, 2013 and 2012 of $1 million, $2 million and $24 million, respectively, related to purchases of licensed software. The Company had accounts receivable from Microsoft of $35 million and $33 million at June 27, 2014 and June 28, 2013.

Basis_of_Presentation_and_Summ1

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 27, 2014
Significant Accounting Policies	'
Basis of Presentation and Consolidation	'
	Basis of Presentation and Consolidation
	The consolidated financial statements include the accounts of the Company and all its wholly-owned and majority-owned subsidiaries, after elimination of intercompany transactions and balances.
	The preparation of financial statements in accordance with U.S. generally accepted accounting principles also requires management to make estimates and assumptions that affect the amounts reported in the Company’s condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. The methods, estimates and judgments the Company uses in applying its most critical accounting policies have a significant impact on the results the Company reports in its condensed consolidated financial statements. The condensed consolidated financial statements reflect, in the opinion of management, all material adjustments necessary to present fairly the condensed consolidated financial position, results of operations, comprehensive income, cash flows and shareholders’ equity for the periods presented. Such adjustments are of a normal and recurring nature.
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	Cash, Cash Equivalents and Short-Term Investments. The Company considers all highly liquid investments with a remaining maturity of 90 days or less at the time of purchase to be cash equivalents. Cash equivalents are carried at cost, which approximates fair value. The Company's short-term investments are primarily comprised of readily marketable debt securities with remaining maturities of more than 90 days at the time of purchase. The Company has classified its entire investment portfolio as available-for-sale and it is stated at fair value with unrealized gains and losses included in Accumulated other comprehensive income (loss), which is a component of Shareholders' Equity. The Company evaluates the available-for sale securities in an unrealized loss position for other-than-temporary impairment. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization and accretion are included in interest income. Realized gains and losses are included in Other, net. The cost of securities sold is based on the specific identification method.
Restricted Cash and Investments	'
	Restricted Cash and Investments. Restricted cash and investments represents cash and cash equivalents and investments that are restricted as to withdrawal or use for other than current operations.
Allowances for Doubtful Accounts	'
	Allowances for Doubtful Accounts.    The Company maintains an allowance for uncollectible accounts receivable based upon expected collectability. This reserve is established based upon historical trends, global macroeconomic conditions and an analysis of specific exposures. The provision for doubtful accounts is recorded as a charge to Marketing and administrative expense.
Inventory	'
	Inventory.    Inventories are valued at the lower of cost (using the first-in, first-out method) or market. Market value is based upon an estimated average selling price reduced by estimated cost of completion and disposal.
Property, Equipment and Leasehold Improvements	'
	Property, Equipment and Leasehold Improvements.    Property, equipment and leasehold improvements are stated at cost. Equipment and buildings are depreciated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated life of the asset or the remaining term of the lease. The costs of additions and substantial improvements to property, equipment and leasehold improvements, which extend the economic life of the underlying assets, are capitalized. The cost of maintenance and repairs to property, equipment and leasehold improvements are expensed as incurred.
Assessment of Goodwill and Other Long-lived Assets for Impairment	'
	Assessment of Goodwill and Other Long-lived Assets for Impairment. The Company accounts for goodwill in accordance with Accounting Standards Codification (ASC) Topic 350 (ASC 350), Intangibles - Goodwill and Other. During fiscal year 2012, the Company adopted ASU No. 2011-08, Intangibles - Goodwill and Other (ASC Topic 350) - Testing Goodwill for Impairment. The Company performs a qualitative assessment at the end of each reporting period to determine if any events or circumstances exist, such as an adverse change in business climate or a decline in the overall industry that would indicate that it would more likely than not reduce the fair value of a reporting unit below its carrying amount, including goodwill.
	The Company tests other long-lived assets, including property, equipment and leasehold improvements and other intangible assets subject to amortization, for recoverability whenever events or changes in circumstances indicate that the carrying value of those assets may not be recoverable. The Company performs a recoverability test to assess the recoverability of an asset group. If the recoverability test indicates that the carrying value of the asset group is not recoverable, the Company will estimate the fair value of the asset group and the excess of the carrying value over the fair value is allocated pro rata to derive the adjusted carrying value of assets in the asset group. The adjusted carrying value of each asset in the asset group is not reduced below its fair value.
	The Company tests other intangible assets not subject to amortization whenever events occur or circumstances change, such as declining financial performance, deterioration in the environment in which the entity operates or deteriorating macroeconomic conditions that have a negative effect on future expected earnings and cash flows that could affect significant inputs used to determine the fair value of the indefinite-lived intangible asset.
Derivative Financial Instruments	'
	Derivative Financial Instruments.    The Company applies the requirements of ASC Topic 815 (ASC 815), Derivatives and Hedging. ASC 815 requires that all derivatives be recorded on the balance sheet at fair value and establishes criteria for designation and effectiveness of hedging relationships.
Establishment of Warranty Accruals	'
	Establishment of Warranty Accruals.    The Company estimates probable product warranty costs at the time revenue is recognized. The Company generally warrants its products for a period of 1 to 5 years. The Company's warranty provision considers estimated product failure rates and trends (including the timing of product returns during the warranty periods), and estimated repair or replacement costs related to product quality issues, if any. The Company also exercises judgment in estimating its ability to sell certain repaired disk drives. Should actual experience in any future period differ significantly from its estimates, the Company's future results of operations could be materially affected.
Revenue Recognition, Sales Returns and Allowances, and Sales Incentive Programs	'
	Revenue Recognition, Sales Returns and Allowances, and Sales Incentive Programs.    The Company's revenue recognition policy complies with ASC Topic 605 (ASC 605), Revenue Recognition. Revenue from sales of products, including sales to distribution customers, is generally recognized when title and risk of loss has passed to the buyer, which typically occurs upon shipment from the Company or third party warehouse facilities, persuasive evidence of an arrangement exists, including a fixed or determinable price to the buyer, and when collectability is reasonably assured. Revenue from sales of products to certain direct retail customers and to customers in certain indirect retail channels is recognized on a sell-through basis.
	The Company records estimated product returns at the time of shipment. The Company also estimates reductions to revenue for sales incentive programs, such as price protection, and volume incentives, and records such reductions when revenue is recorded. The Company establishes certain distributor and OEM sales programs aimed at increasing customer demand. For OEM sales, rebates are typically based on an OEM customer's volume of purchases from Seagate or other agreed upon rebate programs. For the distribution channel, these programs typically involve rebates related to a distributor's level of sales, order size, advertising or point of sale activity and price protection adjustments. The Company provides for these obligations at the time that revenue is recorded based on estimated requirements. Marketing development programs are recorded as a reduction to revenue.
Shipping and Handling	'
	Shipping and Handling.    The Company includes costs related to shipping and handling in Cost of revenue for all periods presented.
Restructuring Costs	'
	Restructuring Costs.     The Company records restructuring activities including costs for one-time termination benefits in accordance with ASC Topic 420 (ASC 420), Exit or Disposal Cost Obligations. The timing of recognition for severance costs accounted for under ASC 420 depends on whether employees are required to render service until they are terminated in order to receive the termination benefits. If employees are required to render service until they are terminated in order to receive the termination benefits, a liability is recognized ratably over the future service period. Otherwise, a liability is recognized when management has committed to a restructuring plan and has communicated those actions to employees. Employee termination benefits covered by existing benefit arrangements are recorded in accordance with ASC Topic 712, Non-retirement Postemployment Benefits. These costs are recognized when management has committed to a restructuring plan and the severance costs are probable and estimable.
Advertising Expense	'
	Advertising Expense.    The cost of advertising is expensed as incurred.
Stock-Based Compensation	'
	Stock-Based Compensation.    The Company accounts for stock-based compensation under the provisions of ASC Topic 718 (ASC 718), Compensation-Stock Compensation. The Company has elected to apply the with-and-without method to assess the realization of excess tax benefits.
Accounting for Income Taxes	'
	Accounting for Income Taxes. The Company accounts for income taxes pursuant to ASC Topic 740 (ASC 740), Incomes Taxes. In applying ASC 740, the Company makes certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments occur in the calculation of tax credits, recognition of income and deductions and calculation of specific tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes, as well as tax liabilities associated with uncertain tax positions. The calculation of tax liabilities involves uncertainties in the application of complex tax rules and the potential for future adjustment of the Company’s uncertain tax positions by the Internal Revenue Service or other tax jurisdictions. If estimates of these tax liabilities are greater or less than actual results, an additional tax benefit or provision will result. The deferred tax assets the Company records each period depend primarily on the Company’s ability to generate future taxable income in the United States and certain non-U.S. jurisdictions. Each period, the Company evaluates the need for a valuation allowance for its deferred tax assets and, if necessary, adjusts the valuation allowance so that net deferred tax assets are recorded only to the extent the Company concludes it is more likely than not that these deferred tax assets will be realized. If the Company’s outlook for future taxable income changes significantly, the Company’s assessment of the need for a valuation allowance may also change.
Comprehensive Income	'
	Comprehensive Income. In the first quarter of fiscal 2013, the Company adopted the revised requirements of ASU No. 2011-05, Comprehensive Income (Topic 220)-Presentation of Comprehensive Income to present comprehensive income in a separate statement. Comprehensive income is comprised of net income and other gains and losses affecting equity that are excluded from net income.
Foreign Currency Remeasurement and Translation	'
	Foreign Currency Remeasurement and Translation.    The U.S. dollar is the functional currency for the majority of the Company's foreign operations. Monetary assets and liabilities denominated in foreign currencies are remeasured into the functional currency of the subsidiary at the balance sheet date. The gains and losses from the remeasurement of foreign currency denominated balances into the functional currency of the subsidiary are included in Other, net on the Company's Consolidated Statements of Operations.
	The Company translates the assets and liabilities of its non-U.S. dollar functional currency subsidiaries into U.S. dollars using exchange rates in effect at the end of each period. Revenue and expenses for these subsidiaries are translated using rates that approximate those in effect during the period. Gains and losses from these translations are recognized in foreign currency translation included in Accumulated other comprehensive loss, which is a component of shareholders’ equity. The Company’s subsidiaries that use the U.S. dollar as their functional currency remeasure monetary assets and liabilities at exchange rates in effect at the end of each period, and inventories, property, and nonmonetary assets and liabilities at historical rates. Gains and losses from these remeasurements were not significant and have been included in the Company’s results of operations.
Concentration of Credit Risk	'
	Concentration of Credit Risk.    The Company's customer base for disk drive products is concentrated with a small number of OEMs and distributors. The Company does not generally require collateral or other security to support accounts receivable. To reduce credit risk, the Company performs ongoing credit evaluations on its customers' financial condition. The Company establishes an allowance for doubtful accounts based upon factors surrounding the credit risk of customers, historical trends and other information. Hewlett-Packard Company and Dell Inc. each accounted for more than 10% of the Company's accounts receivable as of June 27, 2014.
	Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash equivalents, short-term investments and foreign currency forward exchange contracts. The Company further mitigates concentrations of credit risk in its investments through diversification, by limiting its investments in the debt securities of a single issuer, and investing in highly rated securities.
	In entering into foreign currency forward exchange contracts, the Company assumes the risk that might arise from the possible inability of counterparties to meet the terms of their contracts. The counterparties to these contracts are major multinational commercial banks, and the Company has not incurred and does not expect any losses as a result of counterparty defaults.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In July, 2013, the FASB issued ASU No. 2013-11, Income Taxes (ASC Topic 740) — Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The amendments in this ASU provide explicit guidance that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with limited exceptions. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013 and do not require new recurring disclosures. The adoption of this new guidance will not have a material impact on the Company’s consolidated financial statements.
	In May 2014, The FASB issued ASU 2014-09 (ASC Topic 606), Revenue from Contracts with Customers. The ASU outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. It also requires entities to disclose both quantitative and qualitative information that enable financial statements users to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The ASU will be effective for the Company's first quarter of fiscal year 2018. The Company is in the process of assessing the impact, if any, of ASU 2014-09 on its consolidated financial statements.

Fair_Value_Policies

Fair Value (Policies)	12 Months Ended
	Jun. 27, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, Policy	'
	Measurement of Fair Value
	Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and it considers assumptions that market participants would use when pricing the asset or liability.
	Fair Value Hierarchy
	A fair value hierarchy is based on whether the market participant assumptions used in determining fair value are obtained from independent sources (observable inputs) or reflects the Company's own assumptions of market participant valuation (unobservable inputs). A financial instrument's categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that may be used to measure fair value:
	Level 1 - Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2 - Quoted prices for identical assets and liabilities in markets that are inactive; quoted prices for similar assets and liabilities in active markets or financial instruments for which significant inputs are observable, either directly or indirectly; or
	Level 3 - Prices or valuations that require inputs that are both unobservable and significant to the fair value measurement.
	The Company considers an active market to be one in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis, and views an inactive market as one in which there are few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate the Company's or the counterparty's non-performance risk is considered in determining the fair values of liabilities and assets, respectively.

Balance_Sheet_Information_Tabl

Balance Sheet Information (Tables)	12 Months Ended
	Jun. 27, 2014																			Jun. 28, 2013
Disclosure Text Block Supplement [Abstract]	'																			'
Summary of fair value and amortized cost of investments, by major type	'																			'
	(Dollars in millions)		Amortized				Unrealized				Fair									(Dollars in millions)	Amortized		Unrealized			Fair
			Cost				Gain/(Loss)				Value										Cost		Gain/(Loss)			Value
	Available-for-sale securities:																			Available-for-sale securities:
	Money market funds		$	793			$	—			$	793								Money market funds	$	804	$	—		$	804
	Commercial paper		1,261				—				1,261									Commercial paper	655		—			655
	Corporate bonds		6				—				6									Corporate bonds	211		—			211
	U.S. treasuries and agency bonds		—				—				—									U.S. treasuries and agency bonds	96		—			96
	Certificates of deposit		273				—				273									Certificates of deposit	154		—			154
	Auction rate securities		—				—				—									Auction rate securities	17		(2		)	15
	Equity securities		—				—				—									Equity securities	4		—			4
	Other debt securities		—				—				—									Other debt securities	107		(1		)	106
			2,333				—				2,333										2,048		(3		)	2,045
	Trading securities		—				—				—									Trading securities	74		5			79
	Total		$	2,333			$	—			$	2,333								Total	$	2,122	$	2		$	2,124
	Included in Cash and cash equivalents										$	2,309								Included in Cash and cash equivalents						$	1,528
	Included in Short-term investments										20									Included in Short-term investments						480
	Included in Restricted cash and investments										4									Included in Restricted cash and investments						101
	Included in Other assets, net										—									Included in Other assets, net						15
	Total										$	2,333								Total						$	2,124
Fair value and amortized cost of available-for-sale securities by contractual maturity	'																			'
	(Dollars in millions)		Amortized				Fair
			Cost				Value
	Due in less than 1 year		$	2,332			$	2,332
	Due in 1 to 5 years		1				1
	Due in 5 to 10 years		—				—
	Thereafter		—				—
	Total		$	2,333			$	2,333
Accounts Receivable, net	'																			'
	(Dollars in millions)		June 27,				June 28,
			2014				2013
	Accounts receivable		$	1,741			$	1,678
	Allowance for doubtful accounts		(12		)		(8		)
			$	1,729			$	1,670
Activity in the allowance for doubtful accounts	'																			'
	(Dollars in millions)		Balance at				Charges			Deductions (a)			Assumed from		Balance at
			Beginning of				(credit) to						LaCie S.A.		End of
			Period				Operations								Period
	Fiscal year ended June 29, 2012		$	10			3			(3	)		—		$	10
	Fiscal year ended June 28, 2013		$	10			(2	)		(1	)		1		$	8
	Fiscal year ended June 27, 2014		$	8			4			—			—		$	12
	___________________________________
	(a)	Uncollectible accounts written off, net of recoveries.
Inventories	'																			'
	(Dollars in millions)		June 27,				June 28,
			2014				2013
	Raw materials and components		$	324			$	213
	Work-in-process		267				231
	Finished goods		394				410
			$	985			$	854
Other Current Assets	'																			'
	(Dollars in millions)		June 27,				June 28,
			2014				2013
	Vendor non-trade receivables		$	112			$	329
	Other		167				155
			$	279			$	484
Property, Equipment and Leasehold Improvements, net	'																			'
	(Dollars in millions)		Useful Life		June 27,				June 28,
			in Years		2014				2013
	Land and land improvements				$	45			$	44
	Equipment		3 – 5		7,159				6,838
	Buildings and leasehold improvements		Up to 48		1,452				1,401
	Construction in progress				323				261
					8,979				8,544
	Less: accumulated depreciation and amortization				(6,843		)		(6,275		)
					$	2,136			$	2,269
Accumulated Other Comprehensive Income (Loss)	'																			'
	(Dollars in millions)		Unrealized				Unrealized				Unrealized			Foreign			Total
			Gains (Losses)				Gains (Losses)				Gains (Losses)			Currency
			on Cash Flow				on Marketable				on post-			Translation
			Hedges				Securities (a)				retirement plans			Adjustments
	Balance at June 29, 2012		$	—			$	(1	)		$	(8	)	$	—		$	(9	)
	Other comprehensive income (loss) before reclassifications		—				21				(3		)	1			19
	Amounts reclassified from AOCI		—				(23		)		—			—			(23		)
	Other comprehensive income (loss)		—				(2		)		(3		)	1			(4		)
	Balance at June 28, 2013		—				(3		)		(11		)	1			(13		)
	Other comprehensive income (loss) before reclassifications		(1		)		1				1			8			9
	Amounts reclassified from AOCI		—				2				—			—			2
	Other comprehensive income (loss)		(1		)		3				1			8			11
	Balance at June 27, 2014		$	(1	)		$	—			$	(10	)	$	9		$	(2	)
	___________________________________________
	(a)	The cost of a security sold or the amount reclassified out of AOCI into earnings was determined using the specific identification method.

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Jun. 27, 2014
Business Acquisition [Line Items]	'
Fair value of finite-lived intangible assets acquired	'
	(Dollars in millions)	Fair Value			Weighted-
					Average
					Amortization
					Period
	Existing technology	$	137		2.0 years
	Customer relationships	399			5.8 years
	Total amortizable intangible assets acquired	536			4.8 years
	In-process research and development	44
	Total acquired identifiable intangible assets	$	580
Xyratex Ltd [Member]	'
Business Acquisition [Line Items]	'
Fair value of assets acquired and liabilities assumed	'
	(Dollars in millions)	Amount
	Cash and cash equivalents	$	91
	Accounts receivable, net	67
	Inventories	111
	Other current and non-current assets	28
	Property, plant and equipment	55
	Intangible assets	80
	Goodwill	60
	Total assets	492
	Accounts payable and accrued expenses	(116		)
	Total liabilities	(116		)
	Total	$	376
Fair value of finite-lived intangible assets acquired	'
	(Dollars in millions)	Fair Value			Weighted-
					Average
					Amortization
					Period
	Existing technology	$	23		5.5 years
	Customer relationships	18			3.9 years
	Total amortizable intangible assets acquired	41			4.8 years
	In-process research and development	39
	Total acquired identifiable intangible assets	$	80
LaCie S.A. [Member]	'
Business Acquisition [Line Items]	'
Fair value of assets acquired and liabilities assumed	'
	(Dollars in millions)	Amount
	Cash and cash equivalents	$	71
	Accounts receivable	29
	Marketable securities	27
	Inventories	46
	Other current and non-current assets	19
	Property, plant and equipment	12
	Intangible assets	45
	Goodwill	13
	Total assets	262
	Accounts payable and accrued expenses	(73		)
	Current and non-current portion of long-term debt	(6		)
	Total liabilities	(79		)
	Noncontrolling interest	(72		)
	Total	$	111
Fair value of finite-lived intangible assets acquired	'
	(Dollars in millions)	Fair Value			Weighted-
					Average
					Amortization
					Period
	Customer relationships	$	31		5.0 years
	Existing technology	1			5.0 years
	Trade name	13			5.0 years
	Total acquired identifiable intangible assets	$	45
Samsungs Hard Disk Drive Operations [Member]	'
Business Acquisition [Line Items]	'
Fair value of assets acquired and liabilities assumed	'
	(Dollars in millions)	Amount
	Inventories	$	141
	Equipment	76
	Intangible assets	580
	Other assets	28
	Total identifiable assets acquired	825
	Warranty liability	(72		)
	Other liabilities	(45		)
	Total liabilities assumed	(117		)
	Net identifiable assets acquired	708
	Goodwill	432
	Net assets acquired	$	1,140
Samsungs Hard Disk Drive Operations [Member] | Since Acquisition Date, Actual [Member]	'
Business Acquisition [Line Items]	'
Pro Forma Financial Information	'
	(Dollars in millions)	Amount
	Revenue	$	970
	Net income	$	104
Samsungs Hard Disk Drive Operations [Member] | From Prior Annual Reporting Period [Member]	'
Business Acquisition [Line Items]	'
Pro Forma Financial Information	'
		Fiscal Year Ended
	(Dollars in millions)	29-Jun-12
	Revenue	$	16,113
	Net income	$	2,761

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Jun. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes in the carrying amount of goodwill	'
	(Dollars in millions)	Amount
	Balance as of June 29, 2012	$	463
	Goodwill acquired	13
	Balance as of June 28, 2013	476
	Goodwill acquired	60
	Foreign currency translation effect	1
	Balance as of June 27, 2014	$	537
Carrying value of intangible assets	'
	The carrying value of other intangible assets subject to amortization as of June 27, 2014, is set forth in the following table:
	(Dollars in millions)		Gross Carrying		Accumulated			Net Carrying		Weighted Average
			Amount		Amortization			Amount		Remaining Useful Life
	Existing technology		$	24	$	(1	)	$	23	5.2 years
	Customer relationships		450		(192		)	258		3.3 years
	Trade name		10		(1		)	9		3.1 years
	In-process research and development (a)		44		(17		)	27		1.0 year
	Other intangible assets		4		(1		)	3		4.4 years
	Total amortizable other intangible assets		$	532	$	(212	)	$	320	3.2 years
	___________________________________
	(a)	During the fiscal year 2014 quarter ended December 2013, the In-process research and development was completed, and the related asset was accounted for as a finite-lived intangible asset.
	The carrying value of In-process research and development not subject to amortization was $39 million on June 27, 2014.
	The carrying value of other intangible assets subject to amortization as of June 28, 2013 is set forth in the following table:
	(Dollars in millions)		Gross Carrying		Accumulated			Net Carrying		Weighted Average
			Amount		Amortization			Amount		Remaining Useful Life
	Existing technology		$	138	$	(105	)	$	33	0.5 years
	Customer relationships		431		(114		)	317		4.3 years
	Trade name		14		(3		)	11		4.1 years
	Total amortizable other intangible assets		$	583	$	(222	)	$	361	3.9 years
	The carrying value of In-process research and development not subject to amortization was $44 million on June 28, 2013.
Expected amortization expense for acquisition-related intangible assets	'
	(Dollars in millions)		Amount
	2015		$	112
	2016		89
	2017		78
	2018		36
	2019		3
	Thereafter		2
			$	320

Restructuring_and_Exit_Costs_T

Restructuring and Exit Costs (Tables)	12 Months Ended
	Jun. 27, 2014
Restructuring and Related Activities [Abstract]	'
Schedule of Restructuring Reserve by Cost Type	'
	(Dollars in millions)	Post-			Operating			Other			Total
		Employment			Leases			Exit
		Benefits						Costs
	All Restructuring Activities
	Accrual balances at July 1, 2011	$	8		$	31		$	—		$	39
	Restructuring charges	3			—			2			5
	Cash payments	(8		)	(8		)	(2		)	(18		)
	Adjustments	—			(1		)	—			(1		)
	Accrual balances at June 29, 2012	3			22			—			25
	Restructuring charges	1			1			1			3
	Cash payments	(2		)	(7		)	(1		)	(10		)
	Adjustments	—			(1		)	—			(1		)
	Accrual balances at June 28, 2013	2			15			—			17
	Restructuring charges	18			3			2			23
	Cash payments	(20		)	(5		)	(2		)	(27		)
	Adjustments	2			(1		)	—			1
	Accrual balances at June 27, 2014	$	2		$	12		$	—		$	14

Debt_Tables

Debt (Tables)	12 Months Ended
	Jun. 27, 2014
Debt Disclosure [Abstract]	'
Future principal payments on long-term debt	'
	Fiscal Year	Amount
	2015	$	—
	2016	—
	2017	335
	2018	—
	2019	800
	Thereafter	2,785
		$	3,920

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Jun. 27, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Provision For (Benefits From) Income Taxes	'
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Current tax expense (benefit):
	U.S. Federal	$	(12	)	$	3		$	—
	U.S. State	3			10			(2		)
	Non-U.S.	62			50			50
	Total Current	53			63			48
	Deferred tax expense (benefit):
	U.S. Federal	(43		)	(49		)	(30		)
	U.S. State	2			(1		)	2
	Non-U.S.	(26		)	(20		)	—
	Total Deferred	(67		)	(70		)	(28		)
	(Benefit from) provision for income taxes	$	(14	)	$	(7	)	$	20
Schedule of Income Before Income Tax Expense (Benefit)	'
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	U.S.	$	149		$	175		$	137
	Non-U.S	1,407			1,656			2,745
		$	1,556		$	1,831		$	2,882
Schedule of Deferred Tax Assets and Liabilities	'
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,
		2014			2013
	Deferred tax assets
	Accrued warranty	$	99		$	112
	Inventory valuation accounts	49			55
	Receivable allowance	15			13
	Accrued compensation and benefits	103			107
	Depreciation	140			125
	Restructuring accruals	4			5
	Other accruals and deferred items	39			44
	Net operating losses and tax credit carry-forwards	1,081			1,103
	Other assets	8			6
	Total deferred tax assets	1,538			1,570
	Valuation allowance	(888		)	(989		)
	Net deferred tax assets	650			581
	Deferred tax liabilities
	Unremitted earnings of certain non-U.S. entities	(14		)	(14		)
	Acquisition-related items (DTL)	(19		)	(9		)
	Other liabilities	(2		)	(4		)
	Total deferred tax liabilities	(35		)	(27		)
	Total deferred tax assets	$	615		$	554
	As Reported on the Balance Sheet
	Current assets—deferred income taxes	$	126		$	115
	Non-current assets—deferred income taxes	499			456
	Current liabilities—Accrued expenses	—			(2		)
	Other non-current liabilities	(10		)	(15		)
	Total deferred income taxes	$	615		$	554
Schedule of Reconciliation Between the Provision for Income Taxes at the Statutory Rate and the Effective Tax Rate	'
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Provision (benefit) at statutory rate	$	389		$	458		$	720
	Net U.S. state income tax provision	3			12			(2		)
	Permanent differences	3			3			1
	Valuation allowance	(100		)	(97		)	(70		)
	Non-U.S. losses with no tax benefits	8			27			1
	Non-U.S. earnings taxed at less than statutory rate	(313		)	(414		)	(645		)
	Other individually immaterial items	(4		)	4			15
	(Benefit from) provision for income taxes	$	(14	)	$	(7	)	$	20
Schedule of Gross Unrecognized Tax Benefits	'
		Fiscal Years Ended
	(Dollars in millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Balance of unrecognized tax benefits at the beginning of the year	$	157		$	135		$	128
	Gross increase for tax positions of prior years	10			14			1
	Gross decrease for tax positions of prior years	(64		)	(4		)	(3		)
	Gross increase for tax positions of current year	13			16			13
	Gross decrease for tax positions of current year	—			—			—
	Settlements	—			—			—
	Lapse of statutes of limitation	(3		)	(5		)	(3		)
	Non-U.S. exchange (gain)/loss	2			1			(1		)
	Balance of unrecognized tax benefits at the end of the year	$	115		$	157		$	135

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)

12 Months Ended

Jun. 27, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

'

Schedule of notional value of outstanding foreign currency forward exchange contracts

'

As of June 27, 2014

(Dollars in millions)

Contracts Designated as Hedges

Contracts Not Designated as Hedges

Thai baht

$

—

$

143

British Pound Sterling

25

—

Malaysian Ringitt

9

—

$

34

$

143

As of June 28, 2013

(Dollars in millions)

Contracts Designated as Hedges

Contracts Not Designated as Hedges

Thai baht

$

—

$

20

Singapore dollars

—

—

Chinese renminbi

—

—

Czech koruna

—

—

$

—

$

20

Schedule of gross fair value of derivative instruments

'

As of June 27, 2014

Asset Derivatives

Liability Derivatives

(Dollars in millions)

Balance Sheet

Fair

Balance Sheet

Fair

Location

Value

Location

Value

Derivatives designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

$

3

Accrued expenses

$

—

Derivatives not designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

2

Accrued expenses

—

Total return swap

Other current assets

—

Accrued expenses

—

Total derivatives

$

5

$

—

As of June 28, 2013

Asset Derivatives

Liability Derivatives

(Dollars in millions)

Balance Sheet

Fair

Balance Sheet

Fair

Location

Value

Location

Value

Derivatives designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

$

—

Accrued expenses

$

—

Derivatives not designated as hedging instruments:

Foreign currency forward exchange contracts

Other current assets

—

Accrued expenses

(1

)

Total derivatives

$

—

$

(1

)

Schedule of the effect of derivative instruments on Other comprehensive income (loss) OCI and the Consolidated Statement of Operations

'

The following tables show the effect of the Company's derivative instruments on the Consolidated Statement of Comprehensive Income and the Consolidated Statements of Operations for the fiscal year ended June 27, 2014:

(Dollars in millions)

Derivatives Designated as Cash Flow Hedges

Amount of

Location of

Amount of

Location of

Amount of

Gain or

Gain or (Loss)

Gain or

Gain or (Loss)

Gain

(Loss)

Reclassified

(Loss)

Recognized in

or (Loss)

Recognized

from

Reclassified

Income on

Recognized in

in OCI on

Accumulated

from

Derivatives

Income

Derivatives

OCI into

Accumulated

(Ineffective

(Ineffective

(Effective

Income

OCI into

Portion and

Portion and

Portion)

(Effective

Income

Amount Excluded

Amount

Portion)

(Effective

from

Excluded from

Portion)

Effectiveness

Effectiveness

Testing)

Testing) (a)

Foreign currency forward exchange contracts

$

(1

)

Cost of revenue

$

—

Cost of revenue

$

—

Derivatives Not Designated as Hedging Instruments

Location of Gain or

Amount of Gain or

(Loss) Recognized in

(Loss) Recognized in

Income on Derivatives

Income on Derivatives

Foreign currency forward exchange contracts

Other, net

$

—

___________________________________

(a)

The amounts of gains or losses recognized in income related to the ineffective portion of the hedging relationships and to the amount excluded from the assessment of hedge effectiveness were immaterial for the fiscal year ended June 27, 2014.

The following tables show the effect of the Company's derivative instruments on the Consolidated Statement of Comprehensive Income and the Consolidated Statements of Operations for the fiscal year ended June 28, 2013:

(Dollars in millions)

Derivatives Designated as Cash Flow Hedges

Amount of

Location of

Amount of

Location of

Amount of

Gain or

Gain or (Loss)

Gain or

Gain or (Loss)

Gain

(Loss)

Reclassified

(Loss)

Recognized in

or (Loss)

Recognized

from

Reclassified

Income on

Recognized in

in OCI on

Accumulated

from

Derivatives

Income

Derivatives

OCI into

Accumulated

(Ineffective

(Ineffective

(Effective

Income

OCI into

Portion and

Portion and

Portion)

(Effective

Income

Amount Excluded

Amount

Portion)

(Effective

from

Excluded from

Portion)

Effectiveness

Effectiveness

Testing)

Testing) (a)

Foreign currency forward exchange contracts

$

—

Cost of revenue

$

—

Cost of revenue

$

—

Derivatives Not Designated as Hedging Instruments

Location of Gain or

Amount of Gain or

(Loss) Recognized in

(Loss) Recognized in

Income on Derivatives

Income on Derivatives

Foreign currency forward exchange contracts

Other, net

$

3

___________________________________

(a)

The amounts of gains or losses recognized in income related to the ineffective portion of the hedging relationships and to the amount excluded from the assessment of hedge effectiveness were immaterial for the fiscal year ended June 28, 2013.

Fair_Value_Tables

Fair Value (Tables)	12 Months Ended
	Jun. 27, 2014											Jun. 28, 2013
Fair Value Disclosures [Abstract]	'											'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'											'
		Fair Value Measurements at Reporting Date Using											Fair Value Measurements at Reporting Date Using
	(Dollars in millions)	Quoted		Significant		Significant			Total			(Dollars in millions)	Quoted		Significant			Significant		Total
		Prices in		Other		Unobservable			Balance				Prices in		Other			Unobservable		Balance
		Active		Observable		Inputs							Active		Observable			Inputs
		Markets for		Inputs		(Level 3)							Markets for		Inputs			(Level 3)
		Identical		(Level 2)									Identical		(Level 2)
		Instruments											Instruments
		(Level 1)											(Level 1)
	Assets:											Assets:
	Money market funds	$	793	$	—	$	—		$	793		Money market funds	$	787	$	—		$	—	$	787
	Commercial paper	—		1,261		—			1,261			Commercial paper	—		655			—		655
	U.S. treasuries and agency bonds	—		—		—			—			U.S. treasuries and agency bonds	—		96			—		96
	Certificates of deposit	—		269		—			269			Certificates of deposit	—		149			—		149
	Corporate bonds	—		6		—			6			Corporate bonds	—		211			—		211
	Other debt securities	—		—		—			—			Other debt securities	—		106			—		106
	Equity securities	—		—		—			—			Equity securities	4		—			—		4
	Total cash equivalents and short-term investments	793		1,536		—			2,329			Total cash equivalents and short-term investments	791		1,217			—		2,008
	Restricted cash and investments:											Restricted Cash and Investments:
	Mutual Funds	—		—		—			—			Mutual Funds	74		—			—		74
	Other debt securities	—		4		—			4			Other debt securities	22		5			—		27
	Auction rate securities	—		—		—			—			Auction rate securities	—		—			15		15
	Derivative assets	—		5		—			5			Derivative assets	—		—			—		—
	Total assets	$	793	$	1,545	$	—		$	2,338		Total assets	$	887	$	1,222		$	15	$	2,124
	Liabilities:											Liabilities:
	Derivative liabilities	$	—	$	—	$	—		$	—		Derivative liabilities	$	—	$	(1	)	$	—	$	(1	)
	Total return swap	—		—		—			—			Total liabilities	$	—	$	(1	)	$	—	$	(1	)
	Total liabilities	$	—	$	—	$	—		$	—
Schedule of Fair Value, by Balance Sheet Grouping, Measured on Recurring Basis	'											'
		Fair Value Measurements at Reporting Date Using											Fair Value Measurements at Reporting Date Using
	(Dollars in millions)	Quoted		Significant		Significant			Total			(Dollars in millions)	Quoted		Significant			Significant		Total
		Prices in		Other		Unobservable			Balance				Prices in		Other			Unobservable		Balance
		Active		Observable		Inputs							Active		Observable			Inputs
		Markets for		Inputs		(Level 3)							Markets for		Inputs			(Level 3)
		Identical		(Level 2)									Identical		(Level 2)
		Instruments											Instruments
		(Level 1)											(Level 1)
	Assets:											Assets:
	Cash and cash equivalents	$	793	$	1,516	$	—		$	2,309		Cash and cash equivalents	$	787	$	741		$	—	$	1,528
	Short-term investments	—		20		—			20			Short-term investments	4		476			—		480
	Restricted cash and investments	—		4		—			4			Restricted cash and investments	96		5			—		101
	Other current assets	—		—		—			—			Other current assets	—		—			—		—
	Other assets, net	—		5		—			5			Other assets, net	—		—			15		15
	Total assets	$	793	$	1,545	$	—		$	2,338		Total assets	$	887	$	1,222		$	15	$	2,124
	Liabilities:											Liabilities:
	Accrued expenses	$	—	$	—	$	—		$	—		Accrued expenses	$	—	$	(1	)	$	—	$	(1	)
	Total liabilities	$	—	$	—	$	—		$	—		Total liabilities	$	—	$	(1	)	$	—	$	(1	)
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	'											'
		June 27, 2014				June 28, 2013
	(Dollars in millions)	Carrying		Estimated		Carrying			Estimated
		Amount		Fair Value		Amount			Fair Value
	6.8% Senior Notes due October 2016	$	335	$	374	$	335		$	370
	3.75% Senior Notes due November 2018	800		820		—			—
	7.75% Senior Notes due December 2018	—		—		238			259
	6.875% Senior Notes due May 2020	534		578		600			644
	7.00% Senior Notes due November 2021	251		284		600			645
	4.75% Senior Notes due June 2023	1,000		1,009		1,000			938
	4.75% Senior Notes due January 2025	1,000		995		—			—
	Other	—		—		4			4
		3,920		4,060		2,777			2,860
	Less short-term borrowings and current portion of long-term debt	—		—		(3		)	(3		)
	Long-term debt, less current portion	$	3,920	$	4,060	$	2,774		$	2,857

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
	Jun. 27, 2014
Equity [Abstract]	'
Schedule of Share Repurchases	'
	(In millions)	Number of	Dollar Value
		Shares	of Shares
		Repurchased	Repurchased
	Cumulative repurchased through July 1, 2011	89	$	1,406
	Repurchased in fiscal year 2012 (a)	101	2,426
	Cumulative repurchased through June 29, 2012	190	3,832
	Repurchased in fiscal year 2013	54	1,654
	Cumulative repurchased through June 28, 2013	244	5,486
	Repurchased in fiscal year 2014	41	1,912
	Cumulative repurchased through June 27, 2014	285	$	7,398
	__________________________________
	(a) Includes 21 million shares of repurchases for $305 million under the January 2010 Anti-Dilution Share Repurchase Program.

Compensation_Tables

Compensation (Tables)	12 Months Ended
	Jun. 27, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Fair value of nonvested shares and performance shares	'
		Fiscal Years
		2014			2013			2012
	Nonvested awards:
	Weighted-average fair value	$	41.18		$	30.26		$	13.14
	Performance awards:
	Weighted-average fair value	$	48.69		$	30.01		$	11.16
Weighted-average assumptions used to determine the fair value	'
		Fiscal Years
		2014			2013			2012
	Options
	Expected term (in years)	4.2			4.2			4.2
	Volatility	35 - 41%			41 - 53%			49 - 53%
	Weighted-average volatility	40		%	52		%	50		%
	Expected dividend rate	3.1% - 3.8%			3.6 - 5.8%			3.8 - 6.5%
	Weighted-average expected dividend rate	3.7		%	4.4		%	5.9		%
	Risk-free interest rate	1.2 - 1.4%			0.5 - 1.1%			0.6 - 0.9%
	Weighted-average fair value	$	10.41		$	8.96		$	3.61
	ESPP
	Expected term (in years)	0.5			0.5			0.5
	Volatility	34 - 36%			38 - 46%			45 - 54%
	Weighted-average volatility	35		%	42		%	49		%
	Expected dividend rate	3.3 - 3.5%			2.2 - 4.2%			3.9 - 5.2%
	Weighted-average expected dividend rate	3.4		%	3.2		%	4.7		%
	Risk-free interest rate	0.1		%	0.1		%	0.1 - 0.2%
	Weighted-average fair value	$	10.46		$	7.74		$	4.89
	Performance restricted share awards subject to market condition
	Expected term (in years)	3			2.98			2.96
	Weighted-average volatility	46		%	48		%	65		%
	Expected dividend rate	3.80%			4.3		%	6.4		%
	Risk-free interest rate	0.90%			0.3		%	0.3		%
	Weighted-average fair value	$	37.51		$	26.41		$	10.05
Stock option activity	'
	Options		Number of		Weighted-			Weighted-		Aggregate
			Shares		Average			Average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual
								Term
			(In millions)					(In years)		(Dollars In millions)
	Outstanding at June 28, 2013		9.5		$	14.6		3.8		$	286
	Granted		0.9		$	42.54
	Exercised		(3.9	)	$	12.64
	Forfeitures		(0.1	)	$	23.37
	Expirations		—		$	—
	Outstanding at June 27, 2014		6.4		$	19.8		3.8		$	238
	Vested and expected to vest at June 27, 2014		6.2		$	19.4		3.8		$	231
	Exercisable at June 27, 2014		3.5		$	11.56		2.6		$	157
Nonvested share activity	'
	Nonvested Awards		Number of		Weighted-
			Shares		Average
					Grant-
					Date
					Fair Value
			(In millions)
	Nonvested at June 28, 2013		5.4		$	22.07
	Granted		3.5		$	41.18
	Forfeitures		(0.2	)	$	28.69
	Vested		(1.7	)	$	20.36
	Nonvested at June 27, 2014		7		$	32.05
Performance award activity	'
	Performance Awards		Number of		Weighted-
			Shares		Average
					Grant-
					Date
					Fair Value
			(In millions)
	Performance units at June 28, 2013		2.6		$	18.44
	Granted		0.7		$	42.5
	Forfeitures		—		$	—
	Vested		(0.6	)	$	14.55
	Performance units at June 27, 2014		2.7		$	25.43

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Jun. 27, 2014
Earnings Per Share [Abstract]	'
Schedule of computation of basic and diluted net income (loss) per share	'
		Fiscal Years Ended
	(In millions, except per share data)	June 27, 2014			June 28,			June 29,
					2013			2012
	Numerator:
	Net income attributable to Seagate Technology plc	$	1,570		$	1,838		$	2,862
	Number of shares used in per share calculations:
	Total shares for purposes of calculating basic net income per share attributable to Seagate Technology plc	337			370			426
	Weighted-average effect of dilutive securities:
	Employee equity award plans	10			12			15
	Total shares for purpose of calculating diluted net income per share attributable to Seagate Technology plc	347			382			441
	Net income per share attributable to Seagate Technology plc shareholders:
	Basic	$	4.66		$	4.97		$	6.72
	Diluted	$	4.52		$	4.81		$	6.49
Schedule of potential shares excluded from the computation of diluted net income (loss) per share	'
		Fiscal Years Ended
	(In millions)	June 27,		June 28,			June 29,
		2014		2013			2012
	Employee equity award plans	—		—			7

Business_Segment_and_Geographi1

Business Segment and Geographic Information (Tables)	12 Months Ended
	Jun. 27, 2014
Segment Reporting [Abstract]	'
Summary of Operations by Geographic Area	'
			Fiscal Years Ended
	(In millions)		June 27,		June 28,		June 29,
			2014		2013		2012
	Revenue from external customers (a):
	Singapore		$	6,828	$	7,429	$	7,847
	United States		3,679		3,620		3,845
	The Netherlands		2,652		2,804		3,089
	Other		565		498		158
	Consolidated		$	13,724	$	14,351	$	14,939
	Long-lived assets:
	Singapore		$	788	$	881	$	868
	Thailand		398		398		409
	United States		500		427		318
	China		167		212		270
	Malaysia		146		129		144
	Other		680		852		928
	Consolidated		$	2,679	$	2,899	$	2,937
	___________________________________
	(a)	Revenue is attributed to countries based on the shipping location.

Commitments_Tables

Commitments (Tables)	12 Months Ended
	Jun. 27, 2014
Commitments Disclosure [Abstract]	'
Future Minimum Lease Payments for Operating Leases	'
	Fiscal Years Ending	Operating Leases
		(Dollars in millions)
	2015	$	42
	2016	31
	2017	21
	2018	15
	2019	22
	Thereafter	69
		$	200

Guarantees_Tables

Guarantees (Tables)	12 Months Ended
	Jun. 27, 2014
Guarantees [Abstract]	'
Schedule of Product Warranty Liability	'
		Fiscal Years Ended
	(In millions)	June 27,			June 28,			June 29,
		2014			2013			2012
	Balance, beginning of period	$	320		$	363		$	348
	Warranties issued	177			193			169
	Repairs and replacements	(228		)	(276		)	(284		)
	Changes in liability for pre-existing warranties, including expirations	1			37			58
	Warranty liability assumed from acquisitions	3			3			72
	Balance, end of period	$	273		$	320		$	363

Basis_of_Presentation_and_Summ2

Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Schedule of Fiscal Years [Line Items]	'	'	'
Number of Weeks in Fiscal Year	'52	'52	'52
Advertising Expense	'	'	'
Advertising costs	$52	$51	$39
Concentration of Credit Risk	'	'	'
Percentage of consolidated revenue (as a percent)	10.00%	'	'
Minimum [Member]	'	'	'
Schedule of Fiscal Years [Line Items]	'	'	'
Number of Weeks in Fiscal Year	'52	'	'
Establishment of Warranty Accruals	'	'	'
Product warranty period term (in years)	'1 year	'	'
Maximum [Member]	'	'	'
Schedule of Fiscal Years [Line Items]	'	'	'
Number of Weeks in Fiscal Year	'53	'	'
Establishment of Warranty Accruals	'	'	'
Product warranty period term (in years)	'5 years	'	'

Balance_Sheet_Information_Narr

Balance Sheet Information (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Investments, Debt and Equity Securities [Abstract]	'	'	'
Cash and Investments Held as Collateral at Banks	$4	$22	'
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Pretax	'	2	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0	'
Available-for-sale Securities, Cost Basis of Other-than-temporarily Imparied Securities	0	0	'
Restricted Cash and Investments Held in Trust	'	79	'
Depreciation Expense	748	727	739
Capitalized Interest	$7	$10	$4

Balance_Sheet_Information_Summ

Balance Sheet Information (Summary of fair value and amortized cost of investments, by major type)(Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	$2,333	$2,048
Available-for-sale securities, Unrealized Gain/(Loss)	0	-3
Available-for-sale securities, Fair Value	2,333	2,045
Trading securities:	'	'
Trading securities, Amortized Cost	0	74
Trading securities, Unrealized Gain/(Loss)	0	5
Trading securities, Fair Value	0	79
Total available-for-sale and trading securities:	'	'
Investments, Total Amortized Cost	2,333	2,122
Investments, Total Unrealized Gain/(Loss)	0	2
Investments, Total Fair Value	2,333	2,124
Investments, fair value by balance sheet location:	'	'
Included in Short-term investments	20	480
Included in Restricted cash and investments	4	101
Investments, Total Fair Value	2,333	2,124
Fair Value, Total Balance [Member]	'	'
Total available-for-sale and trading securities:	'	'
Investments, Total Fair Value	2,333	2,124
Investments, fair value by balance sheet location:	'	'
Included in Cash and cash equivalents	2,309	1,528
Included in Short-term investments	20	480
Included in Restricted cash and investments	4	101
Included in Other assets, net	0	15
Investments, Total Fair Value	2,333	2,124
Money market funds [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	793	804
Available-for-sale securities, Unrealized Gain/(Loss)	0	0
Available-for-sale securities, Fair Value	793	804
Commercial paper [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	1,261	655
Available-for-sale securities, Unrealized Gain/(Loss)	0	0
Available-for-sale securities, Fair Value	1,261	655
Corporate bonds [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	6	211
Available-for-sale securities, Unrealized Gain/(Loss)	0	0
Available-for-sale securities, Fair Value	6	211
U.S. treasuries and agency bonds [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	0	96
Available-for-sale securities, Unrealized Gain/(Loss)	0	0
Available-for-sale securities, Fair Value	0	96
Certificates of deposit [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	273	154
Available-for-sale securities, Unrealized Gain/(Loss)	0	0
Available-for-sale securities, Fair Value	273	154
Auction rate securities [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	0	17
Available-for-sale securities, Unrealized Gain/(Loss)	0	-2
Available-for-sale securities, Fair Value	0	15
Equity securities [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	0	4
Available-for-sale securities, Unrealized Gain/(Loss)	0	0
Available-for-sale securities, Fair Value	0	4
Other debt securities [Member]	'	'
Available-for-sale securities:	'	'
Available-for-sale securities, Amortized Cost	0	107
Available-for-sale securities, Unrealized Gain/(Loss)	0	-1
Available-for-sale securities, Fair Value	$0	$106

Balance_Sheet_Information_Fair

Balance Sheet Information (Fair value and amortized cost of available-for-sale securities by contractual maturity) (Details) (USD $)	Jun. 27, 2014
In Millions, unless otherwise specified
Amortized Cost	'
Amortized cost, due in less than 1 year	$2,332
Amortized cost, due in 1 to 5 years	1
Amortized cost, due in 5 to 10 years	0
Amortized cost, thereafter	0
Amortized cost, Total	2,333
Fair Value	'
Fair value, due in less than 1 year	2,332
Fair value, due in 1 to 5 years	1
Fair value, due in 5 to 10 years	0
Fair value, thereafter	0
Fair value, Total	$2,333

Balance_Sheet_Information_Acco

Balance Sheet Information (Accounts Receivable, net) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Accounts Receivable, Net [Abstract]	'	'
Accounts Receivable, Gross, Current	$1,741	$1,678
Allowance for Doubtful Accounts Receivable, Current	-12	-8
Accounts Receivable, Net, Current	$1,729	$1,670

Balance_Sheet_Information_Allo

Balance Sheet Information (Allowance for Doubtful Accounts Rollforward) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014		Jun. 28, 2013		Jun. 29, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]	'		'		'
Balance at Beginning of Period	$8		$10		$10
Charges to Operations	4		-2		3
Deductions	0	[1]	-1	[1]	-3	[1]
Assumed from LaCie S.A.	0		1		0
Balance at End of Period	$12		$8		$10
[1]	(a)Uncollectible accounts written off, net of recoveries.

Balance_Sheet_Information_Inve

Balance Sheet Information (Inventories) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Inventory, Net [Abstract]	'	'
Raw materials and components	$324	$213
Work-in-process	267	231
Finished goods	394	410
Total Inventory	$985	$854

Balance_Sheet_Information_Othe

Balance Sheet Information (Other Current Assets) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Other Current Assets [Abstract]	'	'
Vendor non-trade receivables	$112	$329
Other	167	155
Total other current assets	$279	$484

Balance_Sheet_Information_Prop

Balance Sheet Information (Property, Equipment and Leasehold Improvements, net) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013
Property, Equipment and Leasehold Improvements, net	'	'
Property, equipment and leasehold improvements	$8,979	$8,544
Less: accumulated depreciation and amortization	-6,843	-6,275
Total property, equipment and leasehold improvements, net	2,136	2,269
Land [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, equipment and leasehold improvements	45	44
Equipment [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, equipment and leasehold improvements	7,159	6,838
Property, Plant and Equipment, Estimated Useful Lives	'3 – 5	'
Equipment [Member] | Maximum [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, Plant and Equipment, Useful Life	'5 years	'
Equipment [Member] | Minimum [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, Plant and Equipment, Useful Life	'3 years	'
Buildings and leasehold improvements [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, equipment and leasehold improvements	1,452	1,401
Property, Plant and Equipment, Estimated Useful Lives	'Up to 48	'
Buildings and leasehold improvements [Member] | Maximum [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, Plant and Equipment, Useful Life	'48 years	'
Construction in progress [Member]	'	'
Property, Equipment and Leasehold Improvements, net	'	'
Property, equipment and leasehold improvements	$323	$261

Balance_Sheet_Information_Accu

Balance Sheet Information (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Unrealized Gains (Losses) on Cash Flow Hedges	'	'	'
Beginning Balance	$0	$0	'
Other comprehensive income before reclassifications	-1	0	-7
Less: reclassification for amounts included in net income	0	0	5
Other comprehensive income	-1	0	-2
Ending Balance	-1	0	0
Unrealized Gains (Losses) on Marketable Securities (a)	'	'	'
Beginning Balance	-3	-1	'
Other comprehensive income before reclassifications	1	21	-3
Less: reclassification for amounts included in net income	2	-23	4
Other comprehensive income	3	-2	1
Ending Balance	0	-3	-1
Unrealized Gains (Losses) on Post-Retirements	'	'	'
Beginning Balance	-11	-8	'
Other comprehensive income before reclassifications	1	-3	-3
Less: reclassification for amounts included in net income	0	0	1
Other comprehensive income	1	-3	-2
Ending Balance	-10	-11	-8
Foreign Currency Translation Adjustments [Roll Forward]	'	'	'
Beginning Balance	1	0	'
Other comprehensive income before reclassifications	8	1	'
Amounts reclassified from AOCI	0	0	'
Other comprehensive income	8	1	0
Ending Balance	9	1	0
Total	'	'	'
Beginning Balance	-13	-9	'
Other comprehensive income before reclassifications	9	19	'
Amounts reclassified from AOCI	2	-23	'
Total other comprehensive income (loss), net of tax	11	-4	-3
Ending Balance	($2)	($13)	($9)

Acquisitions_Narrative_Details

Acquisitions (Narrative) (Details)

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Mar. 31, 2014

Jun. 27, 2014

Mar. 31, 2014

Aug. 03, 2012

Sep. 28, 2012

Mar. 29, 2013

Aug. 03, 2012

Aug. 03, 2012

Dec. 30, 2011

Jun. 29, 2012

Jun. 28, 2013

Dec. 19, 2011

Jul. 01, 2011

Jun. 29, 2012

Jun. 29, 2012

Jun. 29, 2012

In Millions, except Share data, unless otherwise specified

USD ($)

USD ($)

USD ($)

Xyratex Ltd [Member]

Xyratex Ltd [Member]

Xyratex Ltd [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Warranty Liability [Member]

Other Liabilities [Member]

Other Assets [Member]

USD ($)

USD ($)

USD ($)

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition Costs of Acquired Entity Cash Paid Per Share

'

'

'

'

'

$13.25

'

'

'

'

€ 4.05

'

'

'

'

'

'

'

'

Cash paid for consideration

'

'

'

$376

'

'

$107

'

'

'

'

$571

'

'

'

'

'

'

'

Accounts receivable, net

'

'

'

'

'

67

'

'

'

29

'

'

'

'

'

'

'

'

'

Acquisition related costs

'

'

'

'

10

'

'

'

'

'

'

'

'

22

'

'

'

'

'

Number of shares acquired (shares)

'

'

'

'

'

'

'

'

'

23,382,904

23,382,904

'

'

'

'

'

'

'

'

Percentage of voting interests acquired (percent)

'

'

'

'

'

'

'

'

'

64.50%

64.50%

'

'

'

'

'

'

'

'

Contingent consideration per share (euro per share)

'

'

'

'

'

'

'

'

'

'

€ 0.12

'

'

'

'

'

'

'

'

Contingent consideration threshold (percent)

'

'

'

'

'

'

'

'

'

95.00%

95.00%

'

'

'

'

'

'

'

'

Contingent consideration condition must be reached (Period)

'

'

'

'

'

'

'6

'

'

'

'

'

'

'

'

'

'

'

'

Prepaid compensation cost at fair value

'

'

'

'

'

'

'

'

'

'

9

'

'

'

'

'

'

'

'

Prepaid compensation cost performance period

'

'

'

'

'

'

'36

'

'

'

'

'

'

'

'

'

'

'

'

Total purchase price

'

'

'

'

'

'

111

'

'

'

'

1,140

'

'

'

'

'

'

'

Contingent consideration, potential cash payment

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

'

'

'

Provisional information, initial accounting incomplete, intangibles adjustment

'

'

'

'

'

'

'

'

1

'

'

'

-5

'

'

'

'

'

'

Ownership percentage by parent (percent)

'

'

'

'

'

'

'

'

94.50%

'

'

'

'

'

'

'

'

'

'

Contingent consideration arrangements, change in amount of contingent consideration, liability

'

'

'

'

'

'

'

'

-4

'

'

'

'

'

'

'

'

'

'

Payment for deposit to acquire noncontrolling shares

'

'

'

'

'

'

'

-72

'

'

'

'

'

'

'

'

'

'

'

Cash paid as a deposit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10

'

'

'

Ordinary shares included in consideration

'

'

'

'

'

'

'

'

'

'

'

45,200,000

'

'

'

'

'

'

'

Fair value of ordinary shares included in consideration

'

'

'

'

'

'

'

'

'

'

'

'

'

'

569

'

'

'

'

Percentage of discount on market price for lack of marketability (percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

16.50%

'

'

'

'

Fair value adjustment - Financial Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7

Fair value adjustment - Equipment

'

'

'

'

'

'

'

'

'

'

'

'

3

'

'

'

'

'

'

Fair value adjustment - Financial Liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

2

'

Goodwill

537

476

463

'

'

60

'

'

'

13

'

'

'

'

432

'

'

'

'

Purchase price allocation, portion of goodwill related to assembled workforce in Korea

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4

'

'

'

'

Adjustment for additional depreciation and amortization

'

'

'

'

'

'

'

'

'

'

'

'

'

$65

'

'

'

'

'

Acquisitions_Fair_Value_of_Ass

Acquisitions (Fair Value of Assets Acquired and Liabilities Assumed) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012	Mar. 31, 2014	Aug. 03, 2012	Dec. 19, 2011
In Millions, unless otherwise specified				Xyratex Ltd [Member]	LaCie S.A. [Member]	Samsungs Hard Disk Drive Operations [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Cash and cash equivalents	'	'	'	$91	$71	'
Accounts receivable, net	'	'	'	67	29	'
Marketable securities	'	'	'	'	27	'
Inventories	'	'	'	111	46	141
Other current and non-current assets	'	'	'	28	19	28
Property, plant and equipment	'	'	'	55	12	76
Intangible assets	'	'	'	80	45	580
Goodwill	537	476	463	60	13	432
Total assets	'	'	'	492	262	'
Total identifiable assets acquired	'	'	'	'	'	825
Accounts payable and accrued expenses	'	'	'	-116	-73	'
Current and non-current portion of long-term debt	'	'	'	'	-6	'
Warranty liability	'	'	'	'	'	72
Other liabilities	'	'	'	'	'	45
Total liabilities	'	'	'	-116	-79	-117
Noncontrolling interest	'	'	'	'	-72	'
Net identifiable assets acquired	'	'	'	'	'	708
Total	'	'	'	376	111	'
Net assets acquired	'	'	'	'	'	$1,140

Acquisitions_Finite_Lived_Inta

Acquisitions (Finite Lived Intangible Assets Acquired) (Details) (USD $)

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

In Millions, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Aug. 03, 2012

Aug. 03, 2012

Aug. 03, 2012

Aug. 03, 2012

Aug. 03, 2012

Aug. 03, 2012

Aug. 03, 2012

Dec. 19, 2011

Dec. 19, 2011

Dec. 19, 2011

Dec. 19, 2011

Dec. 19, 2011

Dec. 19, 2011

Dec. 19, 2011

Xyratex Ltd [Member]

Xyratex Ltd [Member]

Xyratex Ltd [Member]

Xyratex Ltd [Member]

Xyratex Ltd [Member]

Xyratex Ltd [Member]

Xyratex Ltd [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

LaCie S.A. [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

Samsungs Hard Disk Drive Operations [Member]

In-process research and development [Member]

Existing Technology [Member]

Existing Technology [Member]

Customer relationships [Member]

Customer relationships [Member]

Existing Technology [Member]

Existing Technology [Member]

Customer relationships [Member]

Customer relationships [Member]

Trade names [Member]

Trade names [Member]

In-process research and development [Member]

Existing Technology [Member]

Existing Technology [Member]

Customer relationships [Member]

Customer relationships [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquired identifiable intangible asset, finite-lived, Amount

'

$41

'

'

$23

'

$18

$45

'

$1

'

$31

'

$13

'

$536

'

'

$137

'

$399

Acquired identifiable intangible asset, indefinite-lived, Amount

'

'

39

'

'

'

'

'

'

'

'

'

'

'

'

'

44

'

'

'

'

Total acquired identifiable intangible assets acquired

'

$80

'

'

'

'

'

$45

'

'

'

'

'

'

'

$580

'

'

'

'

'

Acquired identifiable intangible asset, Weighted Average Useful Life (in years)

'4 years 9 months

'

'

'5 years 6 months

'

'3 years 11 months

'

'

'5 years

'

'5 years

'

'5 years

'

'4 years 9 months 18 days

'

'

'2 years

'

'5 years 9 months 18 days

'

Acquisitions_Acquisitions_Sams

Acquisitions Acquisitions (Samsung HDD Operations Pro Forma Information, Since Acquisition Date, Actual) (Details) (Samsungs Hard Disk Drive Operations [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 28, 2013
Samsungs Hard Disk Drive Operations [Member]	'
Business Acquisition [Line Items]	'
Revenue	$970
Net income	$104

Acquisitions_Samsung_HDD_Opera

Acquisitions (Samsung HDD Operations Pro Forma Information, From Prior Annual Reporting Period) (Details) (Samsungs Hard Disk Drive Operations [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 28, 2013
Samsungs Hard Disk Drive Operations [Member]	'
Business Acquisition [Line Items]	'
Revenue	$16,113
Net income	$2,761

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'
Amortization of Intangible Assets	$131	$147	$75
In-process research and development [Member]	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Indefinite-lived Intangible Assets Acquired	$39	$44	'

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Changes in the carrying amount of goodwill) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013
Goodwill [Roll Forward]	'	'
Balance at the beginning of the period	$476	$463
Goodwill acquired	60	13
Foreign currency translation effect	1	'
Balance at the end of the period	$537	$476

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets (Carrying value of intangible assets) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014		Jun. 28, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	$532		$583
Accumulated Amortization	-212		-222
Net Carrying Amount	320		361
Weighted Average Remaining Useful Life (in years)	'3 years 2 months 0 days		'3 years 10 months 24 days
Existing Technology [Member]	'		'
Acquired Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	24		138
Accumulated Amortization	-1		-105
Net Carrying Amount	23		33
Weighted Average Remaining Useful Life (in years)	'5 years 2 months 0 days		'0 years 6 months
Customer relationships [Member]	'		'
Acquired Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	450		431
Accumulated Amortization	-192		-114
Net Carrying Amount	258		317
Weighted Average Remaining Useful Life (in years)	'3 years 3 months		'4 years 3 months 12 days
Trade names [Member]	'		'
Acquired Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	10		14
Accumulated Amortization	-1		-3
Net Carrying Amount	9		11
Weighted Average Remaining Useful Life (in years)	'3 years 1 month		'4 years 1 month 24 days
In-process research and development (a) [Member]	'		'
Acquired Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	44	[1]	'
Accumulated Amortization	-17		'
Net Carrying Amount	27		'
Weighted Average Remaining Useful Life (in years)	'1 year		'
Other intangible assets [Member]	'		'
Acquired Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	4		'
Accumulated Amortization	-1		'
Net Carrying Amount	$3		'
Weighted Average Remaining Useful Life (in years)	'4 years 5 months		'
[1]	(a)During the fiscal year 2014 quarter ended December 2013, the In-process research and development was completed, and the related asset was accounted for as a finite-lived intangible asset.

Goodwill_and_Other_Intangible_5

Goodwill and Other Intangible Assets (Expected amortization expense for acquisition-related intangible assets) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
2015	$112	'
2016	89	'
2017	78	'
2018	36	'
2019	3	'
Thereafter	2	'
Total	$320	$361

Restructuring_and_Exit_Costs_N

Restructuring and Exit Costs (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012	Jul. 01, 2011
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	$24	$2	$4	'
Restructuring reserve, settled with cash	27	10	18	'
Restructuring Reserve	14	17	25	39
Accrued restructuring balance included in accrued expenses	7	6	'	'
Accrued restructuring balance included in other non-current liabilities	7	11	'	'
Post-Employment Benefits [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	18	1	3	'
Restructuring reserve, settled with cash	20	2	8	'
Restructuring Reserve	2	2	3	8
Operating Leases [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	3	1	0	'
Restructuring reserve, settled with cash	5	7	8	'
Restructuring Reserve	12	15	22	31
AMK Plan [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring costs from inception to the balance sheet date	48	'	'	'
Estimated restructuring charges	50	'	'	'
AMK Plan [Member] | Post-Employment Benefits [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Estimated restructuring charges	42	'	'	'
AMK Plan [Member] | Equipment Relocation [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Estimated restructuring charges	6	'	'	'
AMK Plan [Member] | Facility Closing [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Estimated restructuring charges	2	'	'	'
2014 Plan [Member] | Post-Employment Benefits [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	16	'	'	'
Restructuring reserve, settled with cash	16	'	'	'
Other Restructuring and Exit Costs [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring costs from inception to the balance sheet date	124	'	'	'
Estimated restructuring charges	400	'	'	'
Restructuring reserve, settled with cash	11	'	'	'
Other Restructuring and Exit Costs [Member] | Post-Employment Benefits [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	4	'	'	'
Other Restructuring and Exit Costs [Member] | Operating Leases [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	2	'	'	'
Other Restructuring and Exit Costs [Member] | Other Exit Costs [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring and other, net	2	'	'	'
Maxtor [Member]	'	'	'	'
Restructuring Reserve [Line Items]	'	'	'	'
Restructuring costs from inception to the balance sheet date	$269	'	'	'

Restructuring_and_Exit_Costs_S

Restructuring and Exit Costs (Schedule of Restructuring Reserve by Type of Cost) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Restructuring Reserve [Line Items]	'	'	'
Restructuring Accrual, beginning balance	$17	$25	$39
Restructuring charges	24	2	4
Cash payments	-27	-10	-18
Adjustments	-1	1	1
Restructuring Accrual, ending balance	14	17	25
Post-Employment Benefits [Member]	'	'	'
Restructuring Reserve [Line Items]	'	'	'
Restructuring Accrual, beginning balance	2	3	8
Restructuring charges	18	1	3
Cash payments	-20	-2	-8
Adjustments	-2	0	0
Restructuring Accrual, ending balance	2	2	3
Operating Leases [Member]	'	'	'
Restructuring Reserve [Line Items]	'	'	'
Restructuring Accrual, beginning balance	15	22	31
Restructuring charges	3	1	0
Cash payments	-5	-7	-8
Adjustments	1	1	1
Restructuring Accrual, ending balance	12	15	22
Other Exit Costs [Member]	'	'	'
Restructuring Reserve [Line Items]	'	'	'
Restructuring Accrual, beginning balance	0	0	0
Restructuring charges	2	1	2
Cash payments	-2	-1	-2
Adjustments	0	0	0
Restructuring Accrual, ending balance	0	0	0
Restructuring Charges [Member]	'	'	'
Restructuring Reserve [Line Items]	'	'	'
Restructuring charges	$23	$3	$5

Debt_Narrative_Details

Debt (Narrative) (Details) (USD $)

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Apr. 30, 2013

Jan. 18, 2011

Sep. 20, 2006

Jun. 28, 2013

Jun. 27, 2014

Sep. 20, 2006

Nov. 05, 2013

Jun. 27, 2014

Nov. 05, 2013

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Dec. 14, 2010

13-May-10

Jun. 27, 2014

Jun. 28, 2013

13-May-10

18-May-11

Jun. 27, 2014

Jun. 28, 2013

18-May-11

22-May-13

Jun. 27, 2014

Jun. 28, 2013

22-May-13

28-May-14

Jun. 27, 2014

28-May-14

Jun. 28, 2013

Aug. 03, 2012

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Other Debt [Member]

LaCie S.A. [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

$500,000,000

$350,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sub-limit for issuance of letters of credit under revolving credit facility

'

'

'

75,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility Letters of Credit Outstanding

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate principal amount

'

'

'

'

'

'

'

'

600,000,000

'

'

800,000,000

'

'

'

750,000,000

'

'

'

600,000,000

'

'

'

600,000,000

'

'

'

1,000,000,000

'

'

1,000,000,000

'

'

Stated interest rate (as a percent)

'

'

'

'

'

'

6.80%

6.80%

6.80%

'

3.75%

3.75%

0.00%

0.00%

7.75%

7.75%

'

6.88%

6.88%

6.88%

'

7.00%

7.00%

7.00%

'

4.75%

4.75%

4.75%

'

4.75%

4.75%

0.00%

'

Redemption price as percentage of principal amount (percent)

'

'

'

'

'

'

'

'

100.00%

'

'

100.00%

'

'

'

'

'

'

'

100.00%

'

'

'

100.00%

'

'

'

100.00%

'

'

100.00%

'

'

Debt Instrument, Applicable Premium Percentage of Principal Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

Basis spread on variable rate (basis points)

'

'

'

'

'

50.00%

'

'

'

50.00%

'

'

'

'

'

'

50.00%

'

'

'

50.00%

'

'

'

50.00%

'

'

'

50.00%

'

'

'

'

Debt Instrument, Redemption with Net Proceeds from Equity Offerings as Percentage of Principal

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35.00%

'

'

'

'

'

'

'

'

'

Debt Instrument, Future Redemption Price as Percentage of Original Principal

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

107.00%

'

'

'

'

'

'

'

'

'

Repayments of Long-term Debt

'

'

'

'

'

'

265,000,000

'

'

'

'

'

'

193,000,000

513,000,000

'

'

66,000,000

'

'

'

349,000,000

'

'

'

'

'

'

'

'

'

'

'

Redemption of Long-term Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

44,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss on redemption and repurchase of debt

81,000,000

141,000,000

17,000,000

'

'

'

-44,000,000

'

'

'

'

'

'

-20,000,000

-75,000,000

'

'

-7,000,000

'

'

'

-54,000,000

'

'

'

'

'

'

'

'

'

'

'

Long-term debt assumed from LaCie

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6,000,000

Debt_Future_principal_payments

Debt (Future principal payments on long-term debt) (Details) (USD $)	Jun. 27, 2014
In Millions, unless otherwise specified
Debt Disclosure [Abstract]	'
2015	$0
2016	0
2017	335
2018	0
2019	800
Thereafter	2,785
Total future principal payments on short-term and long-term debt	$3,920

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012	Jul. 01, 2011
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Tax benefit from exercise of stock options	$0.30	$1	$6	'
Increase (Decrease) in valuation allowance	-101	-75	-82	'
Deferred Tax Assets, Net	615	554	'	'
Domestic federal statutory rate (as a percent)	25.00%	25.00%	25.00%	'
Change in net income due to tax holidays and incentive programs	289	338	504	'
Income Tax Holiday Tax Incentive Income Tax Benefits Per Share	$0.83	$0.89	$1.14	'
Temporary differences (including undistributed earnings) related to outside basis in the stock of non-Irish resident subsidiaries	'2.8	'	'	'
Tax amount, if temporary difference were remitted to Ireland as a dividend	700	'	'	'
Total gross unrecognized tax benefits excluding interest and penalties	115	157	135	128
Unrecognized tax benefits, if recognized, would impact effective tax rate	115	157	'	'
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	8	'	'	'
Accrued interest and penalties related to unrecognized tax benefits	27	19	'	'
Minimum [Member]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	-3	'	'	'
Maximum [Member]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	-50	'	'	'
Less than [Member]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	'	2	'	'
U.S. Federal [Member]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Net operating loss carryforwards	2,900	'	'	'
Tax credit carryforwards	348	'	'	'
NOL subject to annual limitation on use	376	'	'	'
Tax credit carryforwards subject to annual limitation on use	90	'	'	'
Aggregate annual limitation on use of NOL and tax credit carryforwards pursuant to U.S. tax law	46	'	'	'
State [Member]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Net operating loss carryforwards	1,800	'	'	'
Tax credit carryforwards	81	'	'	'
Non-U.S. [Member]	'	'	'	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'
Net operating loss carryforwards	$112	'	'	'

Income_Taxes_Schedule_of_Provi

Income Taxes (Schedule of Provision for (Benefit From) Income Taxes) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Current tax expense (benefit):	'	'	'
U.S. Federal	($12)	$3	$0
U.S. State	3	10	-2
Non-U.S.	62	50	50
Total Current	53	63	48
Deferred tax expense (benefit):	'	'	'
U.S. Federal	-43	-49	-30
U.S. State	2	-1	2
Non-U.S.	-26	-20	0
Total Deferred	-67	-70	-28
(Benefit from) provision for income taxes	($14)	($7)	$20

Income_Taxes_Schedule_of_Incom

Income Taxes (Schedule of Income Before Income Taxes) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Income Tax Disclosure [Abstract]	'	'	'
U.S.	$149	$175	$137
Non-U.S	1,407	1,656	2,745
Income before income taxes	$1,556	$1,831	$2,882

Income_Taxes_Schedule_of_Defer

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Deferred tax assets	'	'
Accrued warranty	$99	$112
Inventory valuation accounts	49	55
Receivable allowance	15	13
Accrued compensation and benefits	103	107
Depreciation	140	125
Restructuring accruals	4	5
Other accruals and deferred items	39	44
Net operating losses and tax credit carry-forwards	1,081	1,103
Other assets	8	6
Total deferred tax assets	1,538	1,570
Valuation allowance	888	989
Net deferred tax assets	650	581
Deferred tax liabilities	'	'
Unremitted earnings of certain non-U.S. entities	14	14
Acquisition-related items (DTL)	-19	-9
Other liabilities	2	4
Total deferred tax liabilities	35	27
Total deferred tax assets	615	554
As Reported on the Balance Sheet	'	'
Current assets-deferred income taxes	126	115
Non-current assets-deferred income taxes	499	456
Current liabilities—accrued expenses	0	-2
Other non-current liabilities	10	15
Total deferred income taxes	$615	$554

Income_Taxes_Schedule_of_Recon

Income Taxes (Schedule of Reconciliation Between Income at Statutory Rate and Effective Rate) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Income Tax Disclosure [Abstract]	'	'	'
Provision (benefit) at statutory rate	$389	$458	$720
Net U.S. state income tax provision	3	12	-2
Permanent differences	3	3	1
Valuation allowance	-100	-97	-70
Non-U.S. losses with no tax benefits	8	27	1
Non-U.S. earnings taxed at less than statutory rate	-313	-414	-645
Other individually immaterial items	-4	4	15
(Benefit from) provision for income taxes	($14)	($7)	$20

Income_Taxes_Schedule_of_Gross

Income Taxes (Schedule of Gross Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Income Tax Disclosure [Abstract]	'	'	'
Balance of unrecognized tax benefits at the beginning of the year	$157	$135	$128
Gross increase for tax positions of prior years	10	14	1
Gross decrease for tax positions of prior years	-64	-4	-3
Gross increase for tax positions of current year	13	16	13
Gross decrease for tax positions of current year	0	0	0
Settlements	0	0	0
Lapse of statutes of limitation	-3	-5	-3
Non-U.S. exchange (gain)/loss	-2	-1	1
Balance of unrecognized tax benefits at the end of the year	$115	$157	$135

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Narrative) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
In Millions, unless otherwise specified
Derivative Financial Instruments	'	'	'
Unrealized Gains (Losses) on Cash Flow Hedges, Net	$1	$0	$0
Total Return Swap [Member]	'	'	'
Derivative Financial Instruments	'	'	'
Notional value of total return swap	$90	'	'

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Schedule of notional value of outstanding foreign currency forward exchange contracts) (Details) (Foreign currency forward exchange contracts [Member], USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Derivatives designated as hedging instruments [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	$34	$0
Derivatives designated as hedging instruments [Member] | Thai baht [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	0	0
Derivatives designated as hedging instruments [Member] | British Pound Sterling [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	25	'
Derivatives designated as hedging instruments [Member] | Malaysian Ringitt [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	9	'
Derivatives designated as hedging instruments [Member] | Singapore dollars [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	'	0
Derivatives designated as hedging instruments [Member] | China, Yuan Renminbi	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	'	0
Derivatives designated as hedging instruments [Member] | Czech koruna [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	'	0
Derivatives not designated as hedging instruments [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	143	20
Derivatives not designated as hedging instruments [Member] | Thai baht [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	143	20
Derivatives not designated as hedging instruments [Member] | British Pound Sterling [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	0	'
Derivatives not designated as hedging instruments [Member] | Malaysian Ringitt [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	0	'
Derivatives not designated as hedging instruments [Member] | Singapore dollars [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	'	0
Derivatives not designated as hedging instruments [Member] | China, Yuan Renminbi	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	'	0
Derivatives not designated as hedging instruments [Member] | Czech koruna [Member]	'	'
Derivative Financial Instruments	'	'
Notional value of outstanding foreign currency forward exchange contracts	'	$0

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Schedule of gross fair value of derivative instruments) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Fair Values of Derivative Instruments	'	'
Asset Derivatives, Other current assets	$5	$0
Liability derivatives, Accrued expenses	0	-1
Derivatives designated as hedging instruments [Member] | Foreign currency forward exchange contracts [Member]	'	'
Fair Values of Derivative Instruments	'	'
Asset Derivatives, Other current assets	3	0
Liability derivatives, Accrued expenses	0	0
Derivatives not designated as hedging instruments [Member] | Foreign currency forward exchange contracts [Member]	'	'
Fair Values of Derivative Instruments	'	'
Asset Derivatives, Other current assets	2	0
Liability derivatives, Accrued expenses	0	-1
Derivatives not designated as hedging instruments [Member] | Total Return Swap [Member]	'	'
Fair Values of Derivative Instruments	'	'
Asset Derivatives, Other current assets	0	'
Liability derivatives, Accrued expenses	$0	'

Derivative_Financial_Instrumen5

Derivative Financial Instruments (Schedule of the effect of derivative instruments on Other comprehensive income (loss) and the Consolidated Statement of Operations) (Details) (Foreign currency forward exchange contracts [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014		Jun. 28, 2013
Derivatives Instruments, Gain (Loss)	'		'
Amount of Gain or (Loss) Recognized in Income on Derivative	$0		$3
Cash Flow Hedges [Member]	'		'
Derivatives Instruments, Gain (Loss)	'		'
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	-1		0
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	0		0
Amount of Gain or (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing) (a)	$0	[1]	$0	[2]
[1]	(a)The amounts of gains or losses recognized in income related to the ineffective portion of the hedging relationships and to the amount excluded from the assessment of hedge effectiveness were immaterial for the fiscal year ended June 27, 2014.
[2]	(a)The amounts of gains or losses recognized in income related to the ineffective portion of the hedging relationships and to the amount excluded from the assessment of hedge effectiveness were immaterial for the fiscal year ended June 28, 2013.

Fair_Value_Narrative_Details

Fair Value (Narrative) (Details) (Nonrecurring basis [Member], Significant Unobservable Inputs (Level 3) [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Assets and liabilities measured at fair value on a recurring basis	'	'	'
Cost Method Investments	$46	$66	'
Other, net [Member]	'	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'	'
Cost-method Investments, Other-than-Temporary Impairment	$2	$5	$7

Fair_Value_Schedule_of_Fair_Va

Fair Value (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) (Recurring basis [Member], USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	$793	$791
Restricted cash and investments	0	96
Auction rate securities	0	0
Total assets	793	887
Derivative liabilities	0	0
Total liabilities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Money market funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	793	787
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Commercial paper [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | U.S. treasuries and agency bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Certificates of deposit [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Corporate bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Other debt securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Restricted cash and investments	0	22
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Equity securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	4
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Mutual Funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Restricted cash and investments	0	74
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Auction rate securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Auction rate securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Derivative assets [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative assets	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Derivative liabilities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Total return swap [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	'
Significant Other Observable Inputs (Level 2) [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	1,536	1,217
Restricted cash and investments	4	5
Auction rate securities	5	0
Total assets	1,545	1,222
Derivative liabilities	0	-1
Total liabilities	0	-1
Significant Other Observable Inputs (Level 2) [Member] | Money market funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Commercial paper [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	1,261	655
Significant Other Observable Inputs (Level 2) [Member] | U.S. treasuries and agency bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	96
Significant Other Observable Inputs (Level 2) [Member] | Certificates of deposit [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	269	149
Significant Other Observable Inputs (Level 2) [Member] | Corporate bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	6	211
Significant Other Observable Inputs (Level 2) [Member] | Other debt securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	106
Restricted cash and investments	4	5
Significant Other Observable Inputs (Level 2) [Member] | Equity securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Mutual Funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Restricted cash and investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Auction rate securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Auction rate securities	0	0
Significant Other Observable Inputs (Level 2) [Member] | Derivative assets [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative assets	5	0
Significant Other Observable Inputs (Level 2) [Member] | Derivative liabilities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	-1
Significant Other Observable Inputs (Level 2) [Member] | Total return swap [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	'
Significant Unobservable Inputs (Level 3) [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Restricted cash and investments	0	0
Auction rate securities	0	15
Total assets	0	15
Derivative liabilities	0	0
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) [Member] | Money market funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Commercial paper [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | U.S. treasuries and agency bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Certificates of deposit [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Corporate bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Other debt securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Restricted cash and investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Equity securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Mutual Funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Restricted cash and investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Auction rate securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Auction rate securities	0	15
Significant Unobservable Inputs (Level 3) [Member] | Derivative assets [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Derivative liabilities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) [Member] | Total return swap [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	'
Fair Value, Total Balance [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	2,329	2,008
Restricted cash and investments	4	101
Auction rate securities	5	15
Total assets	2,338	2,124
Derivative liabilities	0	-1
Total liabilities	0	-1
Fair Value, Total Balance [Member] | Money market funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	793	787
Fair Value, Total Balance [Member] | Commercial paper [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	1,261	655
Fair Value, Total Balance [Member] | U.S. treasuries and agency bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	96
Fair Value, Total Balance [Member] | Certificates of deposit [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	269	149
Fair Value, Total Balance [Member] | Corporate bonds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	6	211
Fair Value, Total Balance [Member] | Other debt securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	106
Restricted cash and investments	4	27
Fair Value, Total Balance [Member] | Equity securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash equivalents and short-term investments	0	4
Fair Value, Total Balance [Member] | Mutual Funds [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Restricted cash and investments	0	74
Fair Value, Total Balance [Member] | Auction rate securities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Auction rate securities	0	15
Fair Value, Total Balance [Member] | Derivative assets [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative assets	5	0
Fair Value, Total Balance [Member] | Derivative liabilities [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	0	-1
Fair Value, Total Balance [Member] | Total return swap [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Derivative liabilities	$0	'

Fair_Value_Schedule_of_Fair_Va1

Fair Value (Schedule of Fair Value, by Balance Sheet Grouping, Measured on Recurring Basis) (Details) (USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Assets and liabilities measured at fair value on a recurring basis	'	'
Short-term investments	$20	$480
Recurring basis [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash and cash equivalents	793	787
Short-term investments	0	4
Restricted cash and investments	0	96
Other current assets	0	0
Auction rate securities	0	0
Total assets	793	887
Derivative liabilities	0	0
Total liabilities	0	0
Recurring basis [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash and cash equivalents	1,516	741
Short-term investments	20	476
Restricted cash and investments	4	5
Other current assets	0	0
Auction rate securities	5	0
Total assets	1,545	1,222
Derivative liabilities	0	-1
Total liabilities	0	1
Recurring basis [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash and cash equivalents	0	0
Short-term investments	0	0
Restricted cash and investments	0	0
Other current assets	0	0
Auction rate securities	0	15
Total assets	0	15
Derivative liabilities	0	0
Total liabilities	0	0
Recurring basis [Member] | Fair Value, Total Balance [Member]	'	'
Assets and liabilities measured at fair value on a recurring basis	'	'
Cash and cash equivalents	2,309	1,528
Short-term investments	20	480
Restricted cash and investments	4	101
Other current assets	0	0
Auction rate securities	5	15
Total assets	2,338	2,124
Derivative liabilities	0	-1
Total liabilities	$0	$1

Fair_Value_Significant_Unobser

Fair Value (Significant Unobservable Inputs (Level 3), Reconciliation) (Details) (Recurring basis [Member], Significant Unobservable Inputs (Level 3) [Member], Auction rate securities [Member], USD $)	Jun. 27, 2014	Jun. 28, 2013
In Millions, unless otherwise specified
Recurring basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Auction rate securities [Member]	'	'
Auction rate securities	'	'
Par Value of Securities	$17	'
Fair Value Measurements Using Significant Unobservable Inputs (Level 3), reconciliation	'	'
Balance, beginning of period	0	15
Balance, end of period	$0	$15

Fair_Value_Schedule_of_Carryin

Fair Value (Schedule of Carrying Values and Estimated Fair Values of Debt Instruments) (Details) (USD $)

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Sep. 20, 2006

Jun. 27, 2014

Nov. 05, 2013

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Dec. 14, 2010

Jun. 27, 2014

Jun. 28, 2013

13-May-10

Jun. 27, 2014

Jun. 28, 2013

18-May-11

Jun. 27, 2014

Jun. 28, 2013

22-May-13

Jun. 27, 2014

28-May-14

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 27, 2014

Jun. 28, 2013

In Millions, unless otherwise specified

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Fair Value, Total Balance [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Other Debt [Member]

Other Debt [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 6.8 Percent due October 2016 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 3.75 Percent due November 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 7.75 Percent due December 2018 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 6.875 Percent due May 2020 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 7.00 Percent due November 2021 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due June 2023 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Senior Notes 4.75 Percent Due January 2025 [Member]

Other Debt [Member]

Other Debt [Member]

Debt Fair Value Disclosures

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current and noncurrent debt including short-term borrowings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$3,920

$2,777

$335

$335

$800

$0

$0

$238

$534

$600

$251

$600

$1,000

$1,000

$1,000

$0

$0

$4

$4,060

$2,860

$374

$370

$820

$0

$0

$259

$578

$644

$284

$645

$1,009

$938

$995

$0

$0

$4

Long-term Debt and Capital Lease Obligations, Current

0

-3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

-3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

-3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, less current portion

$3,920

$2,774

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$3,920

$2,774

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$4,060

$2,857

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stated interest rate (as a percent)

'

'

6.80%

6.80%

6.80%

3.75%

3.75%

0.00%

0.00%

7.75%

7.75%

6.88%

6.88%

6.88%

7.00%

7.00%

7.00%

4.75%

4.75%

4.75%

4.75%

4.75%

0.00%

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

Shareholders_Equity_Narrative_

Shareholders' Equity (Narrative) (Details) (USD $)	12 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Nov. 29, 2010	Jan. 25, 2012	Apr. 26, 2012	Jul. 24, 2013
			November 2010 Share Repurchase Program [Member]	January 2012 Share Repurchase Program [Member]	April 2012 Share Repurchase Program [Member]	July2013ShareRepurchaseProgram [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Authorized share capital (in dollars)	$13,500	'	'	'	'	'
Ordinary shares, authorized (in shares)	1,250,000,000	1,250,000,000	'	'	'	'
Ordinary shares, par value (in dollars per share)	$0.00	$0.00	'	'	'	'
Ordinary shares, outstanding (in shares)	326,539,322	359,437,036	'	'	'	'
Preferred shares, authorized (in shares)	100,000,000	100,000,000	'	'	'	'
Preferred shares, par value (in dollars per share)	$0.00	$0.00	'	'	'	'
Ordinary shares, voting rights	'one vote per share	'	'	'	'	'
Stock Repurchase Program, Authorized Amount	'	'	2,000,000,000	1,000,000,000	2,500,000,000	2,500,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$1,500,000,000	'	'	'	'	'

Shareholders_Equity_Schedule_o

Shareholders' Equity (Schedule of Share Repurchases) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Repurchases of Equity Securities, Number of Shares Repurchased	'	'	'
Number of shares repurchased, cumulative, beginning of the period (in shares)	244	190	89
Number of shares repurchased, during the period (in shares)	41	54	101	[1]
Number of shares repurchased, cumulative, end of the period (in shares)	285	244	190
Repurchases of Equity Securities, Dollar Value of Shares Repurchased	'	'	'
Dollar value of shares repurchased, cumulative, beginning of the period	$5,486	$3,832	$1,406
Dollar value of shares repurchased during the period	1,912	1,654	2,426	[1]
Dollar value of shares repurchased, cumulative, end of the period	7,398	5,486	3,832
January 2010 Anti-Dilution Share Repurchase Program [Member]	'	'	'
Repurchases of Equity Securities, Number of Shares Repurchased	'	'	'
Number of shares repurchased, during the period (in shares)	'	'	21
Repurchases of Equity Securities, Dollar Value of Shares Repurchased	'	'	'
Dollar value of shares repurchased during the period	'	'	$305
[1]	(a) Includes 21 million shares of repurchases for $305 million under the January 2010 Anti-Dilution Share Repurchase Program.

Compensation_Narrative_Details

Compensation (Narrative) (Details) (USD $)

12 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Jun. 27, 2014

Oct. 26, 2011

Nov. 04, 2011

Jun. 27, 2014

Jun. 27, 2014

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Jun. 27, 2014

Oct. 31, 2010

Jun. 27, 2014

Oct. 31, 2012

Jun. 27, 2014

Oct. 19, 2012

Jun. 27, 2014

Jun. 27, 2014

Jun. 27, 2014

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Mar. 29, 2013

Jun. 27, 2014

Jun. 28, 2013

Jun. 29, 2012

Jun. 28, 2013

Jun. 28, 2013

Jun. 27, 2014

Jun. 27, 2014

Jun. 27, 2014

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

STX 2012 EIP [Member]

STX 2012 EIP [Member]

STX 2004 SCP [Member]

STX 2004 SCP [Member]

STX 2004 SCP [Member]

STX ESPP [Member]

STX ESPP [Member]

STX ESPP [Member]

STX ESPP [Member]

i365 2010 EIP [Member]

i365 2010 EIP [Member]

LyveMinds Inc. 2012 EIP [Member]

LyveMinds Inc. 2012 EIP [Member]

LyveMinds Inc. 2012 EIP [Member]

Full Value Share Awards [Member]

Full Value Share Awards [Member]

Full Value Share Awards [Member]

TSR/ROIC [Member]

TSR/ROIC [Member]

TSR/ROIC [Member]

AEPS [Member]

AEPS [Member]

AEPS [Member]

AEPS [Member]

40% TSR RSUs [Member]

40% TSR RSUs [Member]

Nonvested Shares [Member]

Performance Awards Market Condition [Member]

Options and Share Appreciation Rights [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Restricted Stock Units (RSUs) [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Shares [Member]

Performance Restricted Share Units [Member]

Stock Compensation Plan [Member]

Performance Shares [Member]

Stock Compensation Plan [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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'

'

Number of shares authorized

'

'

'

'

'

'

'

27,000,000

'

63,500,000

10,000,000

50,000,000

'

'

75,000,000

5,000,000

'

'

'

31,875,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Par value (usd per share)

$0.00

$0.00

'

'

'

'

'

$0.00

'

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'

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'

'

'

'

'

'

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'

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'

'

'

'

'

'

'

'

'

'

Per share weighted average price of shares purchased

'

'

'

'

'

'

'

'

'

'

'

$31.95

'

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'

'

'

'

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'

'

'

'

'

'

'

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'

'

Shares counted against share reserves

'

'

'

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'

'

'

'

'

'

2.1

'

'

'

'

'

'

'

'

'

'

'

'

'

1

Number of shares available for grant

'

'

'

'

'

'

15,700,000

'

'

0

'

10,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares deregistered from the plan

'

'

'

'

'

'

'

'

11,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Plan modification, description and terms

'

'

'

'

'

'

'

'

'

'On November 4, 2011, the Company filed Post-Effective Amendment No. 1 to deregister 11.0 million ordinary shares that remained available for grant as of October 27, 2011 under the SCP and no shares have been granted from the SCP subsequent to that date.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Offering period for Stock Purchase Plan (in months)

'

'

'

'

'

'

'

'

'

'

'

'6 months

'

'

'

'

'10 years

'

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum number of shares per offering period

'

'

'

'

'

'

'

'

'

'

'

1,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee purchase price, percentage of fair market value of ordinary shares

'

'

'

'

'

'

'

'

'

'

'

85.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of options to be vested on first anniversary of vesting commencement date (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

25.00%

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of options to be vested proportionately after first Anniversary of vesting commencement date (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75.00%

'

75.00%

'

'

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining award vesting period (in months)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36

'

36

'

'

36

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of stock units targeted to vest (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000

700,000

600,000

300,000

'

300,000

600,000

'

'

'

'

'

Annual vesting percentage for share awards and restricted units (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

'

'

'

'

Award vesting period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'4 years

'3 years

'

'

'

'

'7 years

'

'

'3 years

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

Performance period (in years)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'

'

'

'

'

'

'

'

'

'

'

Minimum percentage of targeted stock units to vest (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.00%

'

'

'

'

'

'

'

'

'

'

'

Maximum percentage of targeted stock units to vest (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200.00%

'

'

'

'

'

'

'

'

'

'

'

Minimum percentage of total shareholder return achievement required to vest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40.00%

'

'

'

'

Minimum sustained consecutive trading days of acheived TSR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'30

'

'

'

'

Share-based compensation

$118,000,000

$76,000,000

$51,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of options exercised

'

'

'

140,000,000

272,000,000

245,000,000

'

'

'

'

'

26,000,000

17,000,000

17,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate fair value of options vested during the period

'

'

'

12,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation cost

'

'

'

20,000,000

'

'

'

'

'

'

'

1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

164,000,000

52,000,000

'

Number of shares, granted

'

'

'

900,000

'

'

'

'

'

'

'

1,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation cost of estimated forfeitures

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11,000,000

'

'

Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition

'

'

'

'2 years 5 months

'

'

'

'

'

'

'

'1 month

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years 9 months 18 days

'3 years

'

Aggregate fair value of nonvested shares vested

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

73,000,000

'

'

Tax-Deferred Savings Plan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage match of employee contribution under 401(k) plan (as a percent)

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum contribution match by the employer as a percentage of employee compensation (as a percent)

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum amount of contribution per employee made by the employer per year

4,500

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Matching contributions

16,000,000

14,000,000

13,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Compensation Plan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets held in the rabbi trust, included in restricted cash and investments

'

79,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred compensation obligation related to the rabbi trust

'

$87,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Compensation_Fair_Value_of_Non

Compensation (Fair Value of Nonvested Shares and Performance Shares) (Details) (USD $)	12 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Nonvested Shares [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Weighted-average fair value (in dollars per share)	$41.18	$30.26	$13.14
Nonvested Shares [Member] | Nonvested Shares [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Weighted-average fair value (in dollars per share)	$41.18	'	'
Performance Shares [Member] | AEPS [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Weighted-average fair value (in dollars per share)	$48.69	$30.01	$11.16

Compensation_Weightedaverage_a

Compensation (Weighted-average assumptions used to determine the fair value) (Details) (USD $)	12 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'4 years 2 months 12 days	'4 years 2 months 12 days	'4 years 2 months 12 days
Volatility, low end of the range (as a percent)	41.00%	49.00%	49.00%
Volatility, high end of the range (as a percent)	53.00%	53.00%	57.00%
Weighted-average volatility (as a percent)	52.00%	50.00%	55.00%
Weighted-average expected dividend rate (as a percent)	4.40%	5.89%	0.00%
Risk-free interest rate, low end of the range (as a percent)	0.50%	0.60%	0.90%
Risk-free interest rate, high end of the range (as a percent)	1.10%	0.90%	1.80%
Weighted average fair value (dollars per share)	$8.96	$3.61	$5.32
Employee Stock Option [Member] | Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected dividend rate	0.00%	0.00%	0.00%
Employee Stock Option [Member] | Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected dividend rate	0.00%	0.00%	0.00%
Employee Stock Option [Member] | STX ESPP [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'6 months	'6 months	'6 months
Volatility, low end of the range (as a percent)	38.00%	45.00%	44.00%
Volatility, high end of the range (as a percent)	46.00%	54.00%	47.00%
Weighted-average volatility (as a percent)	42.00%	49.00%	45.00%
Weighted-average expected dividend rate (as a percent)	3.23%	0.00%	0.00%
Risk-free interest rate, low end of the range (as a percent)	0.00%	0.10%	0.10%
Risk-free interest rate, high end of the range (as a percent)	0.00%	0.20%	0.20%
Weighted average fair value (dollars per share)	$7.74	$4.89	$3.42
Employee Stock Option [Member] | STX ESPP [Member] | Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected dividend rate	0.00%	0.00%	0.00%
Employee Stock Option [Member] | STX ESPP [Member] | Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected dividend rate	0.00%	0.00%	0.00%
Performance Shares [Member] | TSR/ROIC [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term (in years)	'2 years 11 months 22 days	'2 years 11 months 16 days	'2 years 11 months 16 days
Weighted-average volatility (as a percent)	48.00%	65.00%	64.00%
Expected dividend rate	0.00%	0.00%	'
Risk-free interest rate (as a percent)	0.33%	0.34%	0.81%
Weighted average fair value (dollars per share)	$26.41	$10.05	$12.13

Compensation_Stock_option_acti

Compensation (Stock option activity) (Details) (Employee Stock Option [Member], USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013
Employee Stock Option [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of shares, outstanding at the beginning of the period	9.5	'
Number of shares, granted	0.9	'
Number of shares, exercised	-3.9	'
Number of shares, forfeitures	-0.1	'
Number of shares, expirations	0	'
Number of shares, outstanding at the end of the period	6.4	9.5
Number of shares, vested and expected to vest	6.2	'
Number of shares, exercisable	3.5	'
Weighted-average exercise price, outstanding at the beginning of the period (in dollars per share)	$14.60	'
Weighted-average exercise price, granted (in dollars per share)	$42.54	'
Weighted average exercise price option issued (in dollars per share)	$12.64	'
Weighted-average exercise price, forfeitures (in dollars per share)	$23.37	'
Weighted-average exercise price, expirations (in dollars per share)	$0	'
Weighted-average exercise price, outstanding at the end of the period (in dollars per share)	$19.80	$14.60
Weighted-average exercise price, vested and expected to vest (in dollars per share)	$19.40	'
Weighted-average exercise price, exercisable (in dollars per share)	$11.56	'
Weighted-average remaining contractual term, outstanding at the beginning of the period (in years)	'3 years 9 months 24 days	'3 years 9 months 24 days
Weighted-average remaining contractual term, outstanding at the end of the period (in years)	'3 years 9 months 24 days	'3 years 9 months 24 days
Weighted-average remaining contractual term, vested and expected to vest (in years)	'3 years 9 months 7 days	'
Weighted-average remaining contractual term, exercisable (in years)	'2 years 7 months 15 days	'
Aggregate intrinsic value, outstanding at the beginning of the period	$286	'
Aggregate intrinsic value, outstanding at the end of the period	238	286
Aggregate intrinsic value, vested and expected to vest	231	'
Aggregate intrinsic value, exercisable	$157	'

Compensation_Nonvested_share_a

Compensation (Nonvested share activity) (Details) (Nonvested Shares [Member], USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Weighted-average grant-date fair value, granted (in dollars per share)	$41.18	$30.26	$13.14
Nonvested Shares [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Number of shares, nonvested at the beginning of the period	5.4	'	'
Number of shares, granted	3.5	'	'
Number of shares, forfeitures	-0.2	'	'
Number of shares, vested	-1.7	'	'
Number of shares, nonvested at the end of the period	7	'	'
Weighted-average grant-date fair value, nonvested at the beginning of the period (in dollars per share)	$22.07	'	'
Weighted-average grant-date fair value, granted (in dollars per share)	$41.18	'	'
Weighted-average grant-date fair value, forfeitures (in dollars per share)	$28.69	'	'
Weighted-average grant-date fair value, vested (in dollars per share)	$20.36	'	'
Weighted-average grant-date fair value, nonvested at the end of the period (in dollars per share)	$32.05	'	'

Compensation_Performance_award

Compensation (Performance award activity) (Details) (Performance Shares [Member], Performance Awards Market Condition [Member], USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 27, 2014
Performance Shares [Member] | Performance Awards Market Condition [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of shares, nonvested at the beginning of the period	2.6
Number of shares, granted	0.7
Number of shares, forfeitures	0
Number of shares, vested	-0.6
Number of shares, nonvested at the end of the period	2.7
Weighted-average grant-date fair value, nonvested at the beginning of the period (in dollars per share)	$18.44
Weighted-average grant-date fair value, granted (in dollars per share)	$42.50
Weighted-average grant-date fair value, forfeitures (in dollars per share)	$0
Weighted-average grant-date fair value, vested (in dollars per share)	$14.55
Weighted-average grant-date fair value, nonvested at the end of the period (in dollars per share)	$25.43

Earnings_Per_Share_Schedule_of

Earnings Per Share (Schedule of computation of basic and diluted net income (loss) per share) (Details) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Numerator:	'	'	'
Net income attributable to Seagate Technology plc	$1,570	$1,838	$2,862
Number of shares used in per share calculations:	'	'	'
Total shares for purposes of calculating basic net income per share attributable to Seagate Technology plc	337	370	426
Weighted-average effect of dilutive securities:	'	'	'
Employee equity award plans	10	12	15
Total shares for purpose of calculating diluted net income per share attributable to Seagate Technology plc	347	382	441
Net income per share attributable to Seagate Technology plc ordinary shareholders:	'	'	'
Basic net income per share (in dollars per share)	$4.66	$4.97	$6.72
Diluted net income per share (in dollars per share)	$4.52	$4.81	$6.49

Earnings_Per_Share_Schedule_of1

Earnings Per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) (Employee equity award plans)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Employee equity award plans	'	'	'
Antidilutive securities excluded from computation of earnings per share	'	'	'
Potential common shares excluded from the computation of diluted net income (loss) per share (in shares)	0	0	7

Business_Segment_and_Geographi2

Business Segment and Geographic Information (Narrative) (Details)	12 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Consolidated revenue concentration	'	'	'
Reporting Segments Number	1	'	'
Percentage of consolidated revenue (as a percent)	10.00%	'	'
Consolidated revenue | Dell Inc. [Member]	'	'	'
Consolidated revenue concentration	'	'	'
Percentage of consolidated revenue (as a percent)	13.00%	13.00%	15.00%
Consolidated revenue | Hewlett-Packard Company [Member]	'	'	'
Consolidated revenue concentration	'	'	'
Percentage of consolidated revenue (as a percent)	13.00%	10.00%	14.00%

Business_Segment_and_Geographi3

Business Segment and Geographic Information (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014		Jun. 28, 2013		Jun. 29, 2012
Revenue from external customers and long-lived assets	'		'		'
Revenue	$13,724	[1]	$14,351	[1]	$14,939	[1]
Long-lived assets	2,679		2,899		2,937
Singapore	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Revenue	6,828	[1]	7,429	[1]	7,847	[1]
Long-lived assets	788		881		868
Thailand	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Long-lived assets	398		398		409
United States	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Revenue	3,679	[1]	3,620	[1]	3,845	[1]
Long-lived assets	500		427		318
The Netherlands	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Revenue	2,652	[1]	2,804	[1]	3,089	[1]
China	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Long-lived assets	167		212		270
Malaysia	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Long-lived assets	146		129		144
Other	'		'		'
Revenue from external customers and long-lived assets	'		'		'
Revenue	565	[1]	498	[1]	158	[1]
Long-lived assets	$680		$852		$928
[1]	(a)Revenue is attributed to countries based on the shipping location.

Legal_Environmental_and_Other_1

Legal, Environmental and Other Contingencies (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014
Convolve and MIT Litigation [Member]	'
Loss Contingencies	'
Loss Contingency, Compensatory Damages Sought	$800
Alexander Shukh Litigation [Member]	'
Loss Contingencies	'
Loss Contingency Damages Sought Amount in Excess	75
LEAP Co., Ltd. [Member]	'
Loss Contingencies	'
Loss Contingency, Damages Sought, Value	$38

Commitments_Narrative_Details

Commitments (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012	29-May-14
				LSI Asset Acquisition [Member]
Leases [Abstract]	'	'	'	'
Total rent expense for all land, facility and equipment operating leases, net of sublease income	$39	$35	$34	'
Total sublease rental income	2	4	6	'
Total future lease income to be recognized for existing subleases	5	'	'	'
Adverse leasehold interest related to leases acquired from Maxtor	4	'	'	'
Accrued exit costs	5	9	'	'
Capital Expenditures [Abstract]	'	'	'	'
Non-cancelable commitments for construction of manufacturing facilities and purchases of equipment	189	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Cash Yet to be Paid	'	'	'	$450

Commitments_Future_minimum_lea

Commitments (Future minimum lease payments for operating leases) (Details) (USD $)	Jun. 27, 2014
In Millions, unless otherwise specified
Commitments Disclosure [Abstract]	'
2015	$42
2016	31
2017	21
2018	15
2019	22
Thereafter	69
Total future minimum lease payments for operating leases	$200

Guarantees_Narrative_Details

Guarantees (Narrative) (Details)	12 Months Ended
	Jun. 27, 2014
Minimum [Member]	'
Schedule of Fiscal Years [Line Items]	'
Product warranty period term (in years)	'1 year
Maximum [Member]	'
Schedule of Fiscal Years [Line Items]	'
Product warranty period term (in years)	'5 years

Guarantees_Product_Warranty_De

Guarantees (Product Warranty) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012	Jul. 02, 2010
Guarantees [Abstract]	'	'	'	'
Balance, beginning of period	$320	'	$363	$348
Warranties issued	177	193	169	'
Repairs and replacements	-228	-276	-284	'
Changes in liability for pre-existing warranties, including expirations	1	37	58	'
Product Warranty Accrual, Additions from Business Acquisition	3	3	72	'
Balance, end of period	$273	$320	'	$348

Related_Party_Transactions_Nar

Related Party Transactions (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Samsung [Member]	'	'	'
Related Party Transaction	'	'	'
Revenue recorded from sales to related party	$216	$413	$407
Related Party Transaction, Purchases from Related Party	318	393	102
Accounts payable to related party	34	48	'
Accounts receivable from related party	25	49	'
Microsoft [Member]	'	'	'
Related Party Transaction	'	'	'
Revenue recorded from sales to related party	208	141	54
Related Party Transaction, Purchases from Related Party	1	2	24
Accounts receivable from related party	$35	$33	'