1.0.0.3 false Debt 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 Debt [Abstract] 0 wdc_DebtAbstract wdc false na duration string Debt. false false false false false true false false false 1 false false 0 0 false false Debt. false 3 Debt 1 us-gaap_DebtDisclosureTextBlock 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="left" style="font-size: 10pt; margin-top: 12pt"><b>4. Debt</b> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     In February 2008, Western Digital Technologies, Inc. (“WDTI”), a wholly-owned subsidiary of the Company, entered into a five-year Credit Agreement (“Credit Facility”) that provides for a $750 million unsecured loan consisting of a $500 million term loan facility and a $250 million revolving credit facility. The revolving credit facility includes borrowing capacity available for letters of credit and for short-term borrowings referred to as swingline. In addition, WDTI may elect to expand the Credit Facility by up to $250 million if existing or new lenders provide additional term or revolving commitments. The $500 million term loan had a variable interest rate of 1.50% as of January 1, 2010 and requires sixteen quarterly principal payments, which began in June 2009, of approximately $19 million, $25 million, $31 million and $50 million per quarter for each four-quarter increment. As of January 1, 2010, WDTI had $250 million available for future borrowings on the revolving credit facility and was in compliance with all covenants. </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