From around June 2015 till Sept 2017 we were helping Deloitte to deliver new financial systems for the HSBC Service Company.
As all Banks had to do, HSBC needed to have seperation between retail banking and their services back end operations. For that to work they needed to be able to spin up a subsidiary that had its own financial ledgers, planning, and ERP.
We were brought in to help with the Master Data management. Using DRM to turn the non-globalised Chart Of Accounts (like Cost Centres) into somethign that woudl work with the Oracle ERP Cloud solution (and Hyperion Planning).
I would urge anyone thinking of a new Global system to first tackle getting their master data globalised as the likes of the ERP needs a Cost Centre ID for example, to be the same CC/Description across all entities (even if the Entity would give it context during the GL posting). We managed to get data from golden sources within the Bank, and use DRM to knit these together to produce a consistent (but ever changing) COA.