How to Prevent Grid Spread from Generating Decimals in Oracle EPM Planning?

In Oracle EPM Planning, is there any way, for some measures, to prevent Grid Spread from generating decimal values? Specifically, I would need to modify the total and allocate the differences to the detail levels using Grid Spread for some measures that, by their nature, must be integer numbers (with no decimal places). Is there a native functionality to implement this, or do I need to create a custom rule?

Thank you very much.