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Description of the Business	12 Months Ended
Description of the Business	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	Description of the Business ServiceNow is a leading provider of enterprise cloud computing solutions that define, structure, manage and automate services for global enterprises. We help our customers improve service quality and reduce costs while scaling and automating their businesses. We typically deliver our software via the Internet as a service, through an easy-to-use, consumer product-like interface, which means it can be easily configured and rapidly deployed. In a minority of cases, we deploy our software on-premises at a customer data center to support a customer's unique regulatory or security requirements.