What is in the other details sections? Can that data be moved to additional group header or footer sections (no need to add more group
levels, just sections at the existing group levels. That way you could put all of your Transaction data in what would be the only details section.
Another option would be to put suppress formulas on all of the details sections exept details d. This formula would look something like:
{table.Transaction} = previous({table.Transaction})
-Dell