# Understanding legacy billing reports
<a name="legacy-reports"></a>

This section describes legacy billing reports offered outside of Amazon Cost and Usage Reports. These pages are available for reference. But, we recommend you use Amazon Cost and Usage Reports because these reporting methods will be unavailable at a later date.

**Topics**
+ [Using Detailed Billing Reports](detailed-billing.md)
+ [Migrating from Detailed Billing Reports to Cost and Usage Reports](detailed-billing-migrate.md)
+ [Understanding unused reservation costs](unused-reservation-costs.md)
+ [Downloading a monthly report](monthly-report.md)
+ [Downloading a monthly cost allocation report](monthly-cost-allocation.md)
+ [Downloading an Amazon Usage Report](usage-report.md)