Commitments and Contingencies	9 Months Ended
Oct. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases During the nine months ended October 31, 2017, we extended the lease term of an existing office facility with total additional lease obligations of approximately $2.0 million with the lease expiring through March 2019. Additionally, in August 2017, we entered into a seven-year term operating lease for approximately 45,831 square feet of office space in Mountain View, California with a total rent obligation and management fees of $32.2 million. Letters of Credit In connection with the lease executed in August 2017, we issued a letter of credit of $2.6 million. As of January 31, 2017 and October 31, 2017, we had outstanding letters of credit in the aggregate amount of $7.7 million and $9.6 million, in connection with our facility leases. The letters of credit are collateralized by restricted cash in the same amount and mature at various dates through August 2026. Legal Matters In September 2016, a purported securities class action entitled Ramsay v. Pure Storage, Inc., et al. was filed in the Superior Court of the State of California (San Mateo County) against us and certain of our officers, directors, investors and underwriters for our initial public offering (IPO), asserting claims under sections 11, 12 and 15 of the Securities Act. Substantially identical lawsuits were subsequently filed in the same Court, bringing the same claims against the same defendants. In October 2016, these actions were consolidated under the caption In re Pure Storage, Inc. Shareholder Litigation. In January 2017 and May 2017, the defendants filed demurrers (motions to dismiss) to plaintiffs' complaints on the grounds that the plaintiffs failed to state a claim under the Securities Act, and both times, in April 2017 and August 2017, the Court sustained the demurrers in defendants' favor as to all claims with leave to amend. The plaintiffs subsequently agreed to dismiss the lawsuit entirely, with no amendment or appeal, and in October 2017, the Court dismissed the consolidated action without prejudice. From time to time, we have become involved in claims and other legal matters arising in the normal course of business. We investigate these claims as they arise. Although claims are inherently unpredictable, we currently are not aware of any matters that may have a material adverse effect on our business, financial position, results of operations or cash flows. Accordingly, we have not recorded any loss contingency on our consolidated balance sheet as of October 31, 2017. Indemnification Our arrangements generally include certain provisions for indemnifying customers against liabilities if our products or services infringe a third party’s intellectual property rights. Other guarantees or indemnification arrangements include guarantees of product and service performance and standby letters of credit for lease facilities. It is not possible to determine the maximum potential amount under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. To date, we have not incurred any material costs as a result of such obligations and have not accrued any liabilities related to such obligations in the consolidated financial statements. In addition, we indemnify our officers, directors and certain key employees while they are serving in good faith in their respective capacities. To date, there have been no claims under any indemnification provisions.

Commitments and Contingencies

Operating Leases

During the nine months ended October 31, 2017, we extended the lease term of an existing office facility with total additional lease obligations of approximately $2.0 million with the lease expiring through March 2019. Additionally, in August 2017, we entered into a seven-year term operating lease for approximately 45,831 square feet of office space in Mountain View, California with a total rent obligation and management fees of $32.2 million.

Letters of Credit

In connection with the lease executed in August 2017, we issued a letter of credit of $2.6 million. As of January 31, 2017 and October 31, 2017, we had outstanding letters of credit in the aggregate amount of $7.7 million and $9.6 million, in connection with our facility leases. The letters of credit are collateralized by restricted cash in the same amount and mature at various dates through August 2026.

Legal Matters

In September 2016, a purported securities class action entitled Ramsay v. Pure Storage, Inc., et al. was filed in the Superior Court of the State of California (San Mateo County) against us and certain of our officers, directors, investors and underwriters for our initial public offering (IPO), asserting claims under sections 11, 12 and 15 of the Securities Act. Substantially identical lawsuits were subsequently filed in the same Court, bringing the same claims against the same defendants. In October 2016, these actions were consolidated under the caption In re Pure Storage, Inc. Shareholder Litigation. In January 2017 and May 2017, the defendants filed demurrers (motions to dismiss) to plaintiffs' complaints on the grounds that the plaintiffs failed to state a claim under the Securities Act, and both times, in April 2017 and August 2017, the Court sustained the demurrers in defendants' favor as to all claims with leave to amend. The plaintiffs subsequently agreed to dismiss the lawsuit entirely, with no amendment or appeal, and in October 2017, the Court dismissed the consolidated action without prejudice.

From time to time, we have become involved in claims and other legal matters arising in the normal course of business. We investigate these claims as they arise. Although claims are inherently unpredictable, we currently are not aware of any matters that may have a material adverse effect on our business, financial position, results of operations or cash flows. Accordingly, we have not recorded any loss contingency on our consolidated balance sheet as of October 31, 2017.

Indemnification

Our arrangements generally include certain provisions for indemnifying customers against liabilities if our products or services infringe a third party’s intellectual property rights. Other guarantees or indemnification arrangements include guarantees of product and service performance and standby letters of credit for lease facilities. It is not possible to determine the maximum potential amount under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. To date, we have not incurred any material costs as a result of such obligations and have not accrued any liabilities related to such obligations in the consolidated financial statements. In addition, we indemnify our officers, directors and certain key employees while they are serving in good faith in their respective capacities. To date, there have been no claims under any indemnification provisions.