Other Balance Sheet Accounts	9 Months Ended
	Oct. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Balance Sheet Accounts	Other Balance Sheet AccountsIn March 2020, the Company purchased the property located at 450 Mission St. (“450 Mission”) in San Francisco, California for approximately $150 million, of which $110 million was allocated to land, $34 million to building, which is included in property and equipment, net and $6 million to in-place leases, which is included in intangible assets in the accompanying condensed consolidated balance sheet.Accounts payable, accrued expenses and other liabilities as of October 31, 2020 included approximately $1.6 billion of accrued compensation as compared to $1.5 billion as of January 31, 2020.