The document discusses essential changes to controlling in SAP S/4HANA, including:
1) Controlling is now fully embedded in the general ledger using a universal journal which stores all financial and controlling data in one table.
2) Secondary cost elements are now general ledger accounts.
3) Controlling postings are stored in the universal journal table (ACDOCA) along with financial postings for a single source of data.
4) Compatibility views allow continued access to prior controlling tables for custom programs and reports.