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Business Segments (Tables)
 9 Months Ended
Sep. 30, 2019
Segment Reporting Information [Line Items]  
Business Segment Data
Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets.
 
Three Months Ended September 30, 2019
 
Electric

 
Gas

 
 
 
Total

 
 
 
 
 
 
 
Utilities and

 
Utilities and

 
Commercial

 
Reportable

 
 
 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Renewables

 
Segments

 
Other

 
Eliminations

 
Total

Unaffiliated revenues
$
6,569

 
$
225

 
$
138

 
$
6,932

 
$
8

 
$
—

 
$
6,940

Intersegment revenues
8

 
24

 
—

 
32

 
17

 
(49
)
 
—

Total revenues
$
6,577

 
$
249

 
$
138

 
$
6,964

 
$
25

 
$
(49
)
 
$
6,940

Segment income (loss)(a)
$
1,385

 
$
26

 
$
40

 
$
1,451

 
$
(124
)
 
$
—

 
$
1,327

Add back noncontrolling interests(b)
 
 
 
 
 
 
 
 
 
 
 
 
(19
)
Add back preferred stock dividend
 
 
 
 
 
 
 
 
 
 
 
 
15

Net income
 
 
 
 
 
 
 
 
 
 
 
 
$
1,323

Segment assets
$
133,296

 
$
13,424

 
$
5,278

 
$
151,998

 
$
3,734

 
$
185

 
$
155,917


 
Three Months Ended September 30, 2018
 
Electric

 
Gas

 
 
 
Total

 
 
 
 
 
 
 
Utilities and

 
Utilities and

 
Commercial

 
Reportable

 
 
 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Renewables

 
Segments

 
Other

 
Eliminations

 
Total

Unaffiliated revenues
$
6,253

 
$
232

 
$
127

 
$
6,612

 
$
16

 
$
—

 
$
6,628

Intersegment revenues
7

 
24

 
—

 
31

 
18

 
(49
)
 
—

Total revenues
$
6,260

 
$
256

 
$
127

 
$
6,643

 
$
34

 
$
(49
)
 
$
6,628

Segment income (loss)(c)(d)(e)
$
1,167

 
$
17

 
$
(62
)
 
$
1,122

 
$
(44
)
 
$
—

 
$
1,078

Add back noncontrolling interests
 
 
 
 
 
 
 
 
 
 
 
 
(16
)
Loss from discontinued operations, net of tax
 
 
 
 
 
 
 
 
 
 
 
 
4

Net income
 
 
 
 
 
 
 
 
 
 
 
 
$
1,066


 
Nine Months Ended September 30, 2019
 
Electric

 
Gas

 
 
 
Total

 
 
 
 
 
 
 
Utilities and

 
Utilities and

 
Commercial

 
Reportable

 
 
 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Renewables

 
Segments

 
Other

 
Eliminations

 
Total

Unaffiliated revenues
$
17,357

 
$
1,239

 
$
362

 
$
18,958

 
$
18

 
$
—

 
$
18,976

Intersegment revenues
24

 
72

 
—

 
96

 
53

 
(149
)
 
—

Total revenues
$
17,381

 
$
1,311

 
$
362

 
$
19,054

 
$
71

 
$
(149
)
 
$
18,976

Segment income (loss)(a)
$
2,944

 
$
292

 
$
139

 
$
3,375

 
$
(328
)
 
$
—

 
$
3,047

Add back noncontrolling interests(b)
 
 
 
 
 
 
 
 
 
 
 
 
(110
)
Add back preferred stock dividend
 
 
 
 
 
 
 
 
 
 
 
 
27

Net income
 
 
 
 
 
 
 
 
 
 
 
 
$
2,964

 
Nine Months Ended September 30, 2018
 
Electric

 
Gas

 
 
 
Total

 
 
 
 
 
 
 
Utilities and

 
Utilities and

 
Commercial

 
Reportable

 
 
 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Renewables

 
Segments

 
Other

 
Eliminations

 
Total

Unaffiliated revenues
$
16,783

 
$
1,229

 
$
347

 
$
18,359

 
$
47

 
$
—

 
$
18,406

Intersegment revenues
23

 
72

 
—

 
95

 
54

 
(149
)
 
—

Total revenues
$
16,806

 
$
1,301

 
$
347

 
$
18,454

 
$
101

 
$
(149
)
 
$
18,406

Segment income (loss)(c)(d)(e)(f)(g)(h)
$
2,492

 
$
161

 
$
(4
)
 
$
2,649

 
$
(446
)
 
$
—

 
$
2,203

Add back noncontrolling interests
 
 
 
 
 
 
 
 
 
 
 
 
(12
)
Loss from discontinued operations, net of tax
 
 
 
 
 
 
 
 
 
 
 
 
(1
)
Net income
 
 
 
 
 
 
 
 
 
 
 
 
$
2,190

(a)
Electric Utilities and Infrastructure includes a reduction of a prior year impairment at Citrus County CC related to the plant's cost cap. See Note 3 for additional information.
(b)
Includes the allocation of losses to noncontrolling tax equity members. See Note 1 for additional information.
(c)
All segments include adjustments of prior year tax estimates related to the Tax Act.
(d)
Commercial Renewables includes an impairment charge related to goodwill.
(e)
Other includes costs to achieve the Piedmont acquisition.
(f)
Electric Utilities and Infrastructure includes regulatory and legislative charges related to rate case orders, settlements or other actions of regulators or legislative bodies. See Note 3 for additional information.
(g)
Gas Utilities and Infrastructure includes an impairment of the investment in Constitution. See Note 3 for additional information.
(h)
Other includes the loss on the sale of Beckjord described below and a valuation allowance recorded against the AMT credits.
Duke Energy Ohio [Member]  
Segment Reporting Information [Line Items]  
Business Segment Data
 
Three Months Ended September 30, 2019
 
Electric

 
Gas

 
Total

 
 
 
 
 
 
 
Utilities and

 
Utilities and

 
Reportable

 
 
 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Segments

 
Other

 
Eliminations

 
Total

Total revenues
$
408

 
$
81

 
$
489

 
$
—

 
$
—

 
$
489

Segment income/Net (loss) income
$
62

 
$
13

 
$
75

 
$
(1
)
 
$
—

 
$
74

Segment assets
$
6,107

 
$
3,049

 
$
9,156

 
$
30

 
$
(3
)
 
$
9,183

 
Three Months Ended September 30, 2018
 
Electric

 
Gas

 
Total

 
 
 
 
 
Utilities and

 
Utilities and

 
Reportable

 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Segments

 
Other

 
Total

Total revenues
$
373

 
$
84

 
$
457

 
$
12

 
$
469

Segment income/Net income
$
85

 
$
12

 
$
97

 
$
3

 
$
100


 
Nine Months Ended September 30, 2019
 
Electric

 
Gas

 
Total

 
 
 
 
 
Utilities and

 
Utilities and

 
Reportable

 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Segments

 
Other

 
Total

Total revenues
$
1,099

 
$
354

 
$
1,453

 
$
—

 
$
1,453

Segment income/Net (loss) income
$
129

 
$
65

 
$
194

 
$
(4
)
 
$
190

 
Nine Months Ended September 30, 2018
 
Electric

 
Gas

 
Total

 
 
 
 
 
Utilities and

 
Utilities and

 
Reportable

 
 
 
 
(in millions)
Infrastructure

 
Infrastructure

 
Segments

 
Other

 
Total

Total revenues
$
1,055

 
$
361

 
$
1,416

 
$
36

 
$
1,452

Segment income/Net (loss) income(a)
$
157

 
$
64

 
$
221

 
$
(100
)
 
$
121

(a)    Other includes the loss on the sale of Beckjord described above.