Custom OTBI report build with Summary and Detail report from GL Subject areas

We have a custom requirment like a Summary and detail report through action link, The summary report was generating from General Ledger- Balance real Time Subject area, Where as the Detail report generating from General Ledger- Journals Real Time subject area and Union with Subledger Accounting- Journals Real Time subject area.

From Drill down from Summary to Deatil report what are key columns that need to pick with the above subject areas which drill down has to work properly for the Filtering the data from Summary to Detail report.

Currently for me not filtering data properly from Summary to Detail report.