1.0.0.3 false Basis of Presentation false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 Basis of Presentation [Abstract] 0 us-gaap_GeneralPoliciesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 Basis of Presentation 1 us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0   <div style="font-family: 'Times New Roman',Times,serif"> <div align="center" style="font-size: 10pt; margin-top: 0pt"><b></b> </div> <div align="left"> </div>  <div align="center" style="font-size: 10pt"><b></b></div> <div align="center" style="font-size: 10pt"><b></b></div> <div align="left" style="font-size: 10pt; margin-top: 12pt"><b>1. Basis of Presentation</b> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The accounting policies followed by Western Digital Corporation (the “Company”) are set forth in Note 1 of the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended July 3, 2009. In the opinion of management, all adjustments necessary to fairly state the unaudited condensed consolidated financial statements have been made. All such adjustments are of a normal, recurring nature. Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended July 3, 2009. The results of operations for interim periods are not necessarily indicative of results to be expected for the full year. </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     Company management has made estimates and assumptions relating to the reporting of certain assets and liabilities in conformity with U.S. GAAP. These estimates and assumptions have been applied using methodologies which are consistent throughout the periods presented. However, actual results could differ materially from these estimates. </div> </div>  <!-- Begin Block Tagged Note false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true