R12 intercompany accounting not using AGIS

Hello Community.  We are setting up new legal entities and ledgers and assigning balancing segment values to legal entities.  We currently have an intercompany segment in our chart of accounts which is common to all ledgers.  Is it necessary to use AGIS for intercompany accounting between legal entities and ledgers or can we utilize the intercompany segment in our chart of accounts?

I have researched R12: How To Balance Intercompany Journals Using Intracompany Rules or a Clearing Balancing Segment Value (BSV)? (Doc ID 1640618.1) but I believe that refers to multiple legal entities within one ledger.  We have a need to balance legal entities in different ledgers without using AGIS.