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Income Taxes
 9 Months Ended
Sep. 30, 2019
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 Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2019

 
2018

 
2019

 
2018

Duke Energy
12.4
%
 
13.7
%
 
12.5
%
 
17.0
%
Duke Energy Carolinas
16.7
%
 
22.6
%
 
17.7
%
 
22.3
%
Progress Energy
15.3
%
 
18.8
%
 
16.2
%
 
17.0
%
Duke Energy Progress
14.7
%
 
20.6
%
 
16.1
%
 
18.4
%
Duke Energy Florida
16.5
%
 
15.0
%
 
18.0
%
 
16.3
%
Duke Energy Ohio
12.9
%
 
16.0
%
 
15.2
%
 
16.0
%
Duke Energy Indiana
23.2
%
 
22.7
%
 
23.7
%
 
24.7
%
Piedmont
35.7
%
 
34.4
%
 
18.5
%
 
20.6
%

The decrease in the ETR for Duke Energy for the three months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes.
The decrease in the ETR for Duke Energy for the nine months ended September 30, 2019, was primarily due to a one-time valuation allowance charge in the prior year, an adjustment related to the income tax recognition for equity method investments recorded in the first quarter of 2019 and an increase in the amortization of excess deferred taxes. The equity method investment adjustment was immaterial and relates to prior years.
The decrease in the ETR for Duke Energy Carolinas for the three and nine months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes.
The decrease in the ETR for Progress Energy for the three months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes and favorable tax return true ups partially offset by a decrease in AFUDC equity in the current year.
The decrease in the ETR for Duke Energy Progress for the three and nine months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes and favorable tax return true ups.
The increase in the ETR for Duke Energy Florida for the three and nine months ended September 30, 2019, was primarily due to a decrease in AFUDC equity in the current year.
The decrease in the ETR for Duke Energy Ohio for the three months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes.
The increase in the ETR, in relation to pretax losses, for Piedmont for the three months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes and partially offset by a decrease in favorable tax return true ups. The decrease in the ETR for the nine months ended September 30, 2019, was primarily due to an increase in the amortization of excess deferred taxes and partially offset by a decrease in favorable tax return true ups.
OTHER TAX MATTERS
On October 23, 2019, Duke Energy received a refund of $573 million related to AMT credit carryforwards based on the filing of Duke Energy's 2018 income tax return in 2019.