Taking Bruce's answer into account, an easy way to do this is to have a "Utilities" account with a blank (no) department to send the electricity bill to, then re-allocate the amounts posted at the end of the month to the individual departments. Since you are reallocating the balance in the account at the end of the month, there is no need to do each transaction. I understand the issue of the loss of the description detail, but since it is the balances that are being re-allocated, there isn't really any description to apply to the reallocation transaction.
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Andrew Bates