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Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2015
Duke Energy Carolinas [Member]  
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions, Other Revenue and Expense
Material amounts related to transactions with related parties included in the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
2015

 
2014

 
2015

 
2014

Duke Energy Carolinas
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
202

 
$
217

 
$
421

 
$
439

Indemnification coverages(b)
6

 
5

 
12

 
11

Joint Dispatch Agreement (JDA) revenue(c)
14

 
15

 
40

 
112

Joint Dispatch Agreement (JDA) expense(c)
38

 
40

 
95

 
91

Progress Energy
 
 
 
 
 
 
 
Corporate governance and shared services provided by Duke Energy(a)
$
172

 
$
200

 
$
339

 
$
378

Indemnification coverages(b)
9

 
8

 
19

 
17

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Progress
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
93

 
$
104

 
$
194

 
$
200

Indemnification coverages(b)
4

 
4

 
8

 
9

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Florida
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
79

 
$
97

 
$
145

 
$
178

Indemnification coverages(b)
5

 
4

 
11

 
8

Duke Energy Ohio
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
103

 
$
82

 
$
188

 
$
159

Indemnification coverages(b)
1

 
3

 
4

 
6

Duke Energy Indiana
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
83

 
$
94

 
$
172

 
$
199

Indemnification coverages(b)
2

 
3

 
4

 
5

(a)
The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, legal and accounting fees, as well as other third-party costs. These amounts are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)
The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)
Duke Energy Carolinas and Duke Energy Progress participate in a JDA which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power under the JDA are recorded in Operating Revenues on the Condensed Consolidated Statements of Operations and Comprehensive Income. Expenses from the purchase of power under the JDA are recorded in Fuel used in electric generation and purchased power on the Condensed Consolidated Statements of Operations and Comprehensive Income.
Progress Energy [Member]  
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions, Other Revenue and Expense
Material amounts related to transactions with related parties included in the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
2015

 
2014

 
2015

 
2014

Duke Energy Carolinas
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
202

 
$
217

 
$
421

 
$
439

Indemnification coverages(b)
6

 
5

 
12

 
11

Joint Dispatch Agreement (JDA) revenue(c)
14

 
15

 
40

 
112

Joint Dispatch Agreement (JDA) expense(c)
38

 
40

 
95

 
91

Progress Energy
 
 
 
 
 
 
 
Corporate governance and shared services provided by Duke Energy(a)
$
172

 
$
200

 
$
339

 
$
378

Indemnification coverages(b)
9

 
8

 
19

 
17

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Progress
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
93

 
$
104

 
$
194

 
$
200

Indemnification coverages(b)
4

 
4

 
8

 
9

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Florida
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
79

 
$
97

 
$
145

 
$
178

Indemnification coverages(b)
5

 
4

 
11

 
8

Duke Energy Ohio
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
103

 
$
82

 
$
188

 
$
159

Indemnification coverages(b)
1

 
3

 
4

 
6

Duke Energy Indiana
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
83

 
$
94

 
$
172

 
$
199

Indemnification coverages(b)
2

 
3

 
4

 
5

(a)
The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, legal and accounting fees, as well as other third-party costs. These amounts are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)
The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)
Duke Energy Carolinas and Duke Energy Progress participate in a JDA which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power under the JDA are recorded in Operating Revenues on the Condensed Consolidated Statements of Operations and Comprehensive Income. Expenses from the purchase of power under the JDA are recorded in Fuel used in electric generation and purchased power on the Condensed Consolidated Statements of Operations and Comprehensive Income.
Duke Energy Progress [Member]  
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions, Other Revenue and Expense
Material amounts related to transactions with related parties included in the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
2015

 
2014

 
2015

 
2014

Duke Energy Carolinas
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
202

 
$
217

 
$
421

 
$
439

Indemnification coverages(b)
6

 
5

 
12

 
11

Joint Dispatch Agreement (JDA) revenue(c)
14

 
15

 
40

 
112

Joint Dispatch Agreement (JDA) expense(c)
38

 
40

 
95

 
91

Progress Energy
 
 
 
 
 
 
 
Corporate governance and shared services provided by Duke Energy(a)
$
172

 
$
200

 
$
339

 
$
378

Indemnification coverages(b)
9

 
8

 
19

 
17

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Progress
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
93

 
$
104

 
$
194

 
$
200

Indemnification coverages(b)
4

 
4

 
8

 
9

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Florida
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
79

 
$
97

 
$
145

 
$
178

Indemnification coverages(b)
5

 
4

 
11

 
8

Duke Energy Ohio
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
103

 
$
82

 
$
188

 
$
159

Indemnification coverages(b)
1

 
3

 
4

 
6

Duke Energy Indiana
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
83

 
$
94

 
$
172

 
$
199

Indemnification coverages(b)
2

 
3

 
4

 
5

(a)
The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, legal and accounting fees, as well as other third-party costs. These amounts are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)
The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)
Duke Energy Carolinas and Duke Energy Progress participate in a JDA which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power under the JDA are recorded in Operating Revenues on the Condensed Consolidated Statements of Operations and Comprehensive Income. Expenses from the purchase of power under the JDA are recorded in Fuel used in electric generation and purchased power on the Condensed Consolidated Statements of Operations and Comprehensive Income.
Duke Energy Florida [Member]  
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions, Other Revenue and Expense
Material amounts related to transactions with related parties included in the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
2015

 
2014

 
2015

 
2014

Duke Energy Carolinas
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
202

 
$
217

 
$
421

 
$
439

Indemnification coverages(b)
6

 
5

 
12

 
11

Joint Dispatch Agreement (JDA) revenue(c)
14

 
15

 
40

 
112

Joint Dispatch Agreement (JDA) expense(c)
38

 
40

 
95

 
91

Progress Energy
 
 
 
 
 
 
 
Corporate governance and shared services provided by Duke Energy(a)
$
172

 
$
200

 
$
339

 
$
378

Indemnification coverages(b)
9

 
8

 
19

 
17

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Progress
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
93

 
$
104

 
$
194

 
$
200

Indemnification coverages(b)
4

 
4

 
8

 
9

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Florida
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
79

 
$
97

 
$
145

 
$
178

Indemnification coverages(b)
5

 
4

 
11

 
8

Duke Energy Ohio
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
103

 
$
82

 
$
188

 
$
159

Indemnification coverages(b)
1

 
3

 
4

 
6

Duke Energy Indiana
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
83

 
$
94

 
$
172

 
$
199

Indemnification coverages(b)
2

 
3

 
4

 
5

(a)
The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, legal and accounting fees, as well as other third-party costs. These amounts are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)
The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)
Duke Energy Carolinas and Duke Energy Progress participate in a JDA which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power under the JDA are recorded in Operating Revenues on the Condensed Consolidated Statements of Operations and Comprehensive Income. Expenses from the purchase of power under the JDA are recorded in Fuel used in electric generation and purchased power on the Condensed Consolidated Statements of Operations and Comprehensive Income.
Duke Energy Ohio [Member]  
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions, Other Revenue and Expense
Material amounts related to transactions with related parties included in the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
2015

 
2014

 
2015

 
2014

Duke Energy Carolinas
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
202

 
$
217

 
$
421

 
$
439

Indemnification coverages(b)
6

 
5

 
12

 
11

Joint Dispatch Agreement (JDA) revenue(c)
14

 
15

 
40

 
112

Joint Dispatch Agreement (JDA) expense(c)
38

 
40

 
95

 
91

Progress Energy
 
 
 
 
 
 
 
Corporate governance and shared services provided by Duke Energy(a)
$
172

 
$
200

 
$
339

 
$
378

Indemnification coverages(b)
9

 
8

 
19

 
17

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Progress
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
93

 
$
104

 
$
194

 
$
200

Indemnification coverages(b)
4

 
4

 
8

 
9

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Florida
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
79

 
$
97

 
$
145

 
$
178

Indemnification coverages(b)
5

 
4

 
11

 
8

Duke Energy Ohio
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
103

 
$
82

 
$
188

 
$
159

Indemnification coverages(b)
1

 
3

 
4

 
6

Duke Energy Indiana
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
83

 
$
94

 
$
172

 
$
199

Indemnification coverages(b)
2

 
3

 
4

 
5

(a)
The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, legal and accounting fees, as well as other third-party costs. These amounts are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)
The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)
Duke Energy Carolinas and Duke Energy Progress participate in a JDA which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power under the JDA are recorded in Operating Revenues on the Condensed Consolidated Statements of Operations and Comprehensive Income. Expenses from the purchase of power under the JDA are recorded in Fuel used in electric generation and purchased power on the Condensed Consolidated Statements of Operations and Comprehensive Income.
Duke Energy Indiana [Member]  
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions, Other Revenue and Expense
Material amounts related to transactions with related parties included in the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
2015

 
2014

 
2015

 
2014

Duke Energy Carolinas
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
202

 
$
217

 
$
421

 
$
439

Indemnification coverages(b)
6

 
5

 
12

 
11

Joint Dispatch Agreement (JDA) revenue(c)
14

 
15

 
40

 
112

Joint Dispatch Agreement (JDA) expense(c)
38

 
40

 
95

 
91

Progress Energy
 
 
 
 
 
 
 
Corporate governance and shared services provided by Duke Energy(a)
$
172

 
$
200

 
$
339

 
$
378

Indemnification coverages(b)
9

 
8

 
19

 
17

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Progress
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
93

 
$
104

 
$
194

 
$
200

Indemnification coverages(b)
4

 
4

 
8

 
9

JDA revenue(c)
38

 
40

 
95

 
91

JDA expense(c)
14

 
15

 
40

 
112

Duke Energy Florida
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
79

 
$
97

 
$
145

 
$
178

Indemnification coverages(b)
5

 
4

 
11

 
8

Duke Energy Ohio
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
103

 
$
82

 
$
188

 
$
159

Indemnification coverages(b)
1

 
3

 
4

 
6

Duke Energy Indiana
 
 
 
 
 
 
 
Corporate governance and shared service expenses(a)
$
83

 
$
94

 
$
172

 
$
199

Indemnification coverages(b)
2

 
3

 
4

 
5

(a)
The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, legal and accounting fees, as well as other third-party costs. These amounts are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)
The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)
Duke Energy Carolinas and Duke Energy Progress participate in a JDA which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power under the JDA are recorded in Operating Revenues on the Condensed Consolidated Statements of Operations and Comprehensive Income. Expenses from the purchase of power under the JDA are recorded in Fuel used in electric generation and purchased power on the Condensed Consolidated Statements of Operations and Comprehensive Income.