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Concentration of Credit Risk
6 Months Ended
Jul. 31, 2018
Risks and Uncertainties [Abstract]  
Concentration of Credit Risk Concentration of Credit Risk
    
Autodesk places its cash, cash equivalents and marketable securities in highly liquid instruments with, and in the custody of, diversified financial institutions globally with high credit ratings and limits the amounts invested with any one institution, type of security and issuer. Autodesk’s primary commercial banking relationship is with Citigroup Inc. and its global affiliates. Citibank, N.A., an affiliate of Citigroup, is one of the lead lenders and an agent in the syndicate of Autodesk’s $400.0 million line of credit facility.

Total sales to the distributor Tech Data Corporation and its global affiliates (“Tech Data”) accounted for 35% of Autodesk’s total net revenue for both the three and six months ended July 31, 2018 and 31% and 30% for the three and six months ended July 31, 2017, respectively. The majority of the net revenue from sales to Tech Data is for sales made outside of the United States. In addition, Tech Data accounted for 32% and 31% of trade accounts receivable at July 31, 2018 and January 31, 2018, respectively. No other customer accounted for more than 10% of Autodesk's total net revenue or trade accounts receivable for each of the respective periods.