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Deferred Revenue and Performance Obligations
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Deferred Revenue and Performance Obligations Deferred Revenue and Performance Obligations
Revenues recognized during the year ended December 31, 2021 from amounts included in deferred revenue as of December 31, 2020 were $2.9 billion. Revenues recognized during the year ended December 31, 2020 from amounts included in deferred revenue as of December 31, 2019 were $2.1 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 revenues 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, 2021, the total non-cancelable RPO under our contracts with customers was $11.5 billion, and we expect to recognize revenues on approximately 49% of these RPO over the following 12 months, with the balance to be recognized thereafter.