AWS Billing and Cost Management
User Guide (Version 2.0)

Reservation Details

You can use the reservation columns to find out more about a reserved resource. The columns include but are not limited to the following:


The Availability Zone of the resource that is associated with this line item.


The number of normalized units for each instance of a reservation subscription.


The number of reservations that are covered by this subscription. For example, one Reserved Instance (RI) subscription might have four associated RI reservations.


The ARN of the Reserved Instance (RI) that this line item benefited from.


The total number of reserved normalized units for all instances for a reservation subscription. AWS computes total normalized units by multiplying the reservation/NormalizedUnitsPerReservation by the reservation/NumberOfReservations.


The total number of reserved units in a subscription. In the case of a Reserved Instance (RI), this is the total number of hours across all RIs in this subscription. This is calculated by multiplying the NumberOfReservations by the UnitsPerReservation.


The number of usage units reserved by a single reservation in a given subscription, such as how many hours a single Amazon EC2 RI has reserved.