Hello:
Maybe you could look into the EURO currency change over strategy that was inplace a lil over 10 years ago. Lot of consulting note at service marketplace and also SPRO had still a few entries dedicated to it last time I checked.
It's all about choosing a cut date to start from and convert your customizing and master data from this point on.
So even though this is for Euro, you can actually base your strategy on the existing documentation:
Wish you a lot of success.