Allentown, PA-Based Utility Corp PPL Had a Net Increase in Its Regulated Liabilities of $2.185 Bil in 2017 Due to the Trump Tax Cuts Act ..................................................................................... But the Past and Present Utility Customers Get Shafted Here Due to the US Government's Oppressive Handling of This $2.185 Bil Amount Owed To Utility Customers ..................................................................................... This is Another Case of the US Government's Philosophy of Corporate Profits Over People

Here's some relevant excerpts from PPL's very recent filing of its 10-K 2017 annual report to the SEC:

"PPL’s U.S. regulated operations' accounting for income taxes are impacted by rate regulation. Therefore, reductions in accumulated deferred income tax balances due to the reduction in the U.S. federal corporate income tax rate to 21% under the provisions of the TCJA may result in amounts previously collected from utility customers for these deferred taxes to be refundable to such customers over a period of time. The TCJA includes provisions that stipulate how these excess deferred taxes are to be passed back to customers for certain accelerated tax depreciation benefits. Potential refunds of other deferred taxes will be determined by the Registrants’ regulators."

Net Increase in Regulatory Liabilities (Owed to Utility Customers)
..... PPL $2.185 Bil
..... PPL Electric $1.019 Bil
..... LKE $1.116 Bil
..... LG&E $532 Mil
..... KU $63 Mil

It is only fair that if Utility Customers overpaid their past monthly utility bills, they should receive an immediate cash refund for their overpayments.  The US Government in the Trump Tax Act bars this from happening.