Migration of 4 year historical data including closed invoices

We are currently implementing Oracle Fusion Financials for our organization. Our client has requested that we migrate four years of historical Accounts Payable data, including closed invoices, as well as the corresponding General Ledger information.

We would like to seek your recommendation on the best-practice approach for handling this level of historical data migration in Oracle Fusion. Specifically, we are interested in your guidance on how to structure the migration between the subledger (for open items) and the General Ledger (for historical, closed activity), along with any considerations or constraints we should be aware of.