The amount originally authorized.
When performing an Authorization Reversal transaction, this field is to contain the total sum of all amounts authorized for this transaction (including any and all incremental authorizations). The TotalAuthorizedAmount minus the SettlementAmount will be the total amount reversed.
This must be presented with an implied decimal point. For example, US $10.00 must be represented as 1000, and $0.10 is likewise simply 10.