Intercompany accounts for PA cross charging

Hello Community.  We are setting up another business group, legal entity, ledger, and operating unit for our India operations and need the ability to have India employees charge labor to Corporate US projects which is in a separate BG, LE, ledger, and OU.  We currently use only one natural account for intercompany (so that Payables and Receivables interco activity nets to zero in that one account) and use an intercompany segment in our COA to process interco transactions.  Balancing segment values will be linked to the separate legal entities, so data access sets are automatically created to only allow those