Loading Accruals at Month End

Summary:

We have an issue at month end where we need to create receivables accruals for invoices that we will not load into Oracle until after month end, the invoices (bills) are created in a system that feeds them into Oracle.

Content (required):

As per the summary, we need to create a month end accrual entry in the Oracle GL. One the complicating factors in creating the accrual is that it will be quite large. Each customer has a different accounting distribution and the entry will contain hundreds of lines. Would anyone have any suggestions of an easy quick way to create the entry. The only documentation we will have consists of a report of what will actually be billed in the next period.