General Ledger: does the leading ledger automatically post to the other standard ledgers

Hello,

The above question. I get the impression this is the case after googling (my book, certification guide, also doesn't mention it)?

But that wouldn't make sense? If my leading ledger= IFRS, and my standard (non leading) second ledger=US GAAP, IT wouldn't make sense that my IFRS data get posted to the US GAAP ledger?

Thank you,