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Income Taxes
 9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Income Taxes INCOME TAXES
EFFECTIVE TAX RATES
The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table.
Three Months EndedNine Months Ended
September 30,September 30,
2021202020212020
Duke Energy6.6 %7.8 %6.7 %(6.4)%
Duke Energy Carolinas2.9 %12.0 %3.6 %13.6 %
Progress Energy12.9 %10.4 %11.5 %13.4 %
Duke Energy Progress6.3 %3.1 %5.9 %10.0 %
Duke Energy Florida19.1 %21.4 %19.1 %20.3 %
Duke Energy Ohio13.4 %16.7 %15.3 %16.6 %
Duke Energy Indiana15.8 %19.6 %16.3 %19.4 %
Piedmont25.0 %16.7 %8.4 %3.7 %
The decrease in the ETR for Duke Energy for the three months ended September 30, 2021, was primarily due to an increase in the amortization of excess deferred taxes.
The increase in the ETR for Duke Energy for the nine months ended September 30, 2021, was primarily due to the cancellation of the ACP pipeline project recorded in the prior year, partially offset by an increase in the amortization of excess deferred taxes.
The decrease in the ETR for Duke Energy Carolinas for the three and nine months ended September 30, 2021, was primarily due to an increase in the amortization of excess deferred taxes.
The increase in the ETR for Progress Energy for the three months ended September 30, 2021, was primarily due to a decrease in the amortization of excess deferred taxes.
The decrease in the ETR for Progress Energy for the nine months ended September 30, 2021, was primarily due to an increase in the amortization of excess deferred taxes.
The increase in the ETR for Duke Energy Progress for the three months ended September 30, 2021, was primarily due to a decrease in the amortization of excess deferred taxes.
The decrease in the ETR for Duke Energy Progress for the nine months ended September 30, 2021, was primarily due to an increase in the amortization of excess deferred taxes.
The decrease in the ETR for Duke Energy Florida for the three and nine months ended September 30, 2021, was primarily due to unfavorable tax adjustments in the prior year.
The decrease in the ETR for Duke Energy Ohio for the three and nine months ended September 30, 2021, was primarily due to an increase in the amortization of excess deferred taxes.
The decrease in the ETR for Duke Energy Indiana for the three and nine months ended September 30, 2021, was primarily due to an increase in the amortization of excess deferred taxes.
The increase in the ETR for Piedmont for the three months ended September 30, 2021, was primarily due to a certain favorable tax credits.The increase in the ETR for Piedmont for the nine months ended September 30, 2021, was primarily due to a decrease in AFUDC equity.