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Revenue from Contracts with Customers
 3 Months Ended
Mar. 31, 2024
Revenue from Contract with Customer [Abstract]  
Revenue from Contracts with Customers Revenue from Contracts with Customers
The following table summarizes the activity in deferred revenue (in millions):
Three Months Ended March 31, 2024
Deferred revenue, beginning of year$41 
Deferred revenue, end of period52 
Revenue recognized in the period from amounts included in deferred revenue at the beginning of period$29 
As of March 31, 2024, approximately $688 million of revenue is expected to be recognized from remaining performance obligations for customer contracts. We expect to recognize revenue of approximately $643 million from these remaining performance obligations over the next 24 months, with the balance recognized thereafter.
The following tables summarize the activity in deferred contract acquisition costs (in millions):
Three Months Ended March 31, 2024
Beginning balance$127 
Capitalization of sales commissions costs30 
Amortization of sales commissions costs(19)
Ending balance$138 

Amortization expense attributable to deferred contract acquisition costs was $14 for the three months ended March 31, 2023.