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Deferred Revenue and Performance Obligations	12 Months Ended
Deferred Revenue and Performance Obligations	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Deferred Revenue and Performance Obligations	Deferred Revenue and Performance Obligations Revenues recognized during the year ended December 31, 2019 from amounts included in deferred revenue as of December 31, 2018 are $1.6 billion. Revenues recognized during the year ended December 31, 2018 from amounts included in deferred revenue as of December 31, 2017 are $1.1 billion. Remaining Performance Obligations Transaction price allocated to remaining performance obligations (RPO) represents contracted revenue that has not yet been recognized, which includes deferred revenue and non-cancelable amounts that will be invoiced and recognized as revenue in future periods. RPO excludes contracts that are billed in arrears, such as certain time and materials contracts, as we apply the “right to invoice” practical expedient under relevant accounting guidance. As of December 31, 2019, our RPO was approximately $6.6 billion, and we expect to recognize revenues on approximately 50% of these RPO over the following 12 months, with the balance to be recognized thereafter.