Discount Code applied is not visible in transaction details

In sale/customer section we don't see the information on how much original price and discount applied for the customer was. If we are running multiple discount codes we would like to see which discount codes actually was applied for the transaction.
For me, I have same discounts but with different code(due to marketing and distribution). So I have to use external analytics to guess where the sale came from and what coupon code they used.
Even in details of the transaction I cant see this information.