Subsequent Events	3 Months Ended
Oct. 02, 2015
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events Joint Venture On November 9, 2015, the Company announced an agreement to form a joint venture with Unis to market and sell the Company's current data center storage systems in China and to develop data storage systems for the Chinese market in the future. The joint venture will be 51% owned by Unis and its subsidiary, Unissoft (Wuxi) Group Co. Ltd., and 49% by the Company. The joint venture is expected to become operational by the fourth quarter of fiscal 2016, pending regulatory approvals. Planned Acquisition of SanDisk On October 21, 2015, the Company entered into an Agreement and Plan of Merger with SanDisk, a global leader in NAND flash storage solutions, pursuant to which a subsidiary of the Company will merge with and into SanDisk, with SanDisk surviving as a wholly owned subsidiary of the Company. The planned acquisition is primarily intended to deepen the Company's expertise in non-volatile memory and enable the Company to vertically integrate into NAND, securing long-term access to solid state technology at a lower cost. The merger agreement values SanDisk’s outstanding common stock at a value of $86.50 per share, or a total equity value of approximately $18.9 billion, based on the volume weighted average price of the Company’s common stock for the five trading days ending on October 20, 2015. If the Unis Investment closes prior to the acquisition, the Company will pay $85.10 per share in cash and issue 0.0176 shares of its common stock per share of SanDisk’s common stock; and if the Unis Investment has not occurred or has been terminated, the Company will pay $67.50 per share in cash and issue 0.2387 shares of its common stock per share of SanDisk’s common stock. The above allocation between cash and shares of the Company’s common stock is subject to reallocation, at the Company’s election, if the amount of cash that SanDisk has available at the closing of the planned merger falls below certain thresholds. The planned acquisition will be financed by a mix of cash, new debt financing and issuance of the Company’s common stock. In connection with the planned acquisition, the Company expects to enter into new debt facilities totaling $18.1 billion. The Company has received commitments for a $1 billion revolving credit facility, $3 billion in amortizing term loans, $6 billion in other term loans and $8.1 billion in secured and unsecured bridge facilities. The Company expects to issue approximately $5.1 billion in secured and unsecured notes in lieu of drawing the bridge facilities at close, with the balance of the bridge facilities to be repaid with available cash. The proceeds from the new debt facilities are expected to be used to pay part of the purchase price, refinance existing debt of both the Company and SanDisk and pay transaction related fees and expenses. Consummation of the merger is subject to customary closing conditions, including without limitation: (i) the required approval by SanDisk shareholders and, if the Unis Investment has not occurred or has been terminated, approval by the Company’s shareholders; (ii) the expiration or early termination of the waiting period applicable to the consummation of the merger under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the receipt of regulatory clearance under certain foreign antitrust laws, including the European Union and China; and (iii) if the Unis Investment has not been terminated and is a “covered transaction” for CFIUS purposes, or if CFIUS otherwise requests or requires a filing with respect to the merger, the approval of CFIUS. In certain circumstances, a termination fee may be payable by either the Company or SanDisk upon termination of the transaction as more fully described in the merger agreement. Ministry of Commerce of the People’s Republic of China (“MOFCOM”) Decision In connection with the regulatory approval process of the Hitachi Global Storage Technologies Holdings Pte. Ltd. ("HGST") acquisition, which closed on March 8, 2012, the Company agreed to certain conditions required by MOFCOM, including adopting measures to maintain HGST as an independent competitor until MOFCOM agreed otherwise. Accordingly, since March 2012, the Company has operated its global business through two independent subsidiaries — HGST and WD. In March 2014, the Company submitted an application to MOFCOM to lift the condition it imposed on the Company to operate these businesses separately. On October 19, 2015, MOFCOM issued a decision in response to the Company’s application that permits the Company to integrate its HGST and WD subsidiaries, except that the Company committed to continue to maintain two sales teams that will separately offer products under the WD or HGST brands for two years from the date of the decision.

14. Subsequent Events

Joint Venture

On November 9, 2015, the Company announced an agreement to form a joint venture with Unis to market and sell the Company's current data center storage systems in China and to develop data storage systems for the Chinese market in the future. The joint venture will be 51% owned by Unis and its subsidiary, Unissoft (Wuxi) Group Co. Ltd., and 49% by the Company. The joint venture is expected to become operational by the fourth quarter of fiscal 2016, pending regulatory approvals.

Planned Acquisition of SanDisk

On October 21, 2015, the Company entered into an Agreement and Plan of Merger with SanDisk, a global leader in NAND flash storage solutions, pursuant to which a subsidiary of the Company will merge with and into SanDisk, with SanDisk surviving as a wholly owned subsidiary of the Company. The planned acquisition is primarily intended to deepen the Company's expertise in non-volatile memory and enable the Company to vertically integrate into NAND, securing long-term access to solid state technology at a lower cost.

The merger agreement values SanDisk’s outstanding common stock at a value of $86.50 per share, or a total equity value of approximately $18.9 billion, based on the volume weighted average price of the Company’s common stock for the five trading days ending on October 20, 2015. If the Unis Investment closes prior to the acquisition, the Company will pay $85.10 per share in cash and issue 0.0176 shares of its common stock per share of SanDisk’s common stock; and if the Unis Investment has not occurred or has been terminated, the Company will pay $67.50 per share in cash and issue 0.2387 shares of its common stock per share of SanDisk’s common stock. The above allocation between cash and shares of the Company’s common stock is subject to reallocation, at the Company’s election, if the amount of cash that SanDisk has available at the closing of the planned merger falls below certain thresholds.

The planned acquisition will be financed by a mix of cash, new debt financing and issuance of the Company’s common stock. In connection with the planned acquisition, the Company expects to enter into new debt facilities totaling $18.1 billion. The Company has received commitments for a $1 billion revolving credit facility, $3 billion in amortizing term loans, $6 billion in other term loans and $8.1 billion in secured and unsecured bridge facilities. The Company expects to issue approximately $5.1 billion in secured and unsecured notes in lieu of drawing the bridge facilities at close, with the balance of the bridge facilities to be repaid with available cash. The proceeds from the new debt facilities are expected to be used to pay part of the purchase price, refinance existing debt of both the Company and SanDisk and pay transaction related fees and expenses.

Consummation of the merger is subject to customary closing conditions, including without limitation: (i) the required approval by SanDisk shareholders and, if the Unis Investment has not occurred or has been terminated, approval by the Company’s shareholders; (ii) the expiration or early termination of the waiting period applicable to the consummation of the merger under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the receipt of regulatory clearance under certain foreign antitrust laws, including the European Union and China; and (iii) if the Unis Investment has not been terminated and is a “covered transaction” for CFIUS purposes, or if CFIUS otherwise requests or requires a filing with respect to the merger, the approval of CFIUS. In certain circumstances, a termination fee may be payable by either the Company or SanDisk upon termination of the transaction as more fully described in the merger agreement.

Ministry of Commerce of the People’s Republic of China (“MOFCOM”) Decision

In connection with the regulatory approval process of the Hitachi Global Storage Technologies Holdings Pte. Ltd. ("HGST") acquisition, which closed on March 8, 2012, the Company agreed to certain conditions required by MOFCOM, including adopting measures to maintain HGST as an independent competitor until MOFCOM agreed otherwise. Accordingly, since March 2012, the Company has operated its global business through two independent subsidiaries — HGST and WD. In March 2014, the Company submitted an application to MOFCOM to lift the condition it imposed on the Company to operate these businesses separately. On October 19, 2015, MOFCOM issued a decision in response to the Company’s application that permits the Company to integrate its HGST and WD subsidiaries, except that the Company committed to continue to maintain two sales teams that will separately offer products under the WD or HGST brands for two years from the date of the decision.