FRS - best practice for drilldown

Content

We are building a reporting tree for Natural Account using the Segment Hierarchy Interface, in which parent/child is not 1:1 since some accounts fall into multiple rows on the financial report, dependent on which Functional Centre/Department it is coded to. Ex: Natural account value 1111 rolls up 99% of the time into "Salaries" but if its used with Functional Centre 9999 then it rolls into "Benefits"

- Is there a way to still achieve the drilldown using Financial Reporting Studio without having to hide rows and point the calculation to a different row? (thus cannot drilldown).

-Assuming in a tree, the value can only be listed once and have one parent?