Inter company between Ledgers and IC Segment

Summary

Inter company understanding between ledgers

Content

we have 3 ledgers and want to do intercompany .

3 companies with 3 ledgers (3 entities) 

I have defined the IC segment .

how will it work ? if i change the code i:e 

 

Debit : 10-000-000-10-112000-00

Credit : 10-000-000-20-112000-00   (20 is intercompany)

so, in this case, will it generate two separate Intercompany payables and Receivables?

Earlier in fusion without IC segment ,it use to generate the Automatic entries, then whats the use of IC segment ?

anyhow i have done the Intercompany rules setup , periods is open  but no auto genrating the intercompany entries