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Segment Information
 9 Months Ended
Sep. 30, 2019
Segment Reporting Information [Line Items]  
Segment Reporting Disclosure [Text Block]
Segment Information

The Company's reportable segments with foreign operations include Northern Powergrid, whose business is principally in the United Kingdom, BHE Transmission, whose business includes operations in Canada, and BHE Renewables, whose business includes operations in the Philippines. Intersegment eliminations and adjustments, including the allocation of goodwill, have been made. Information related to the Company's reportable segments is shown below (in millions):
 
Three-Month Periods
 
Nine-Month Periods
 
Ended September 30,
 
Ended September 30,
 
2019
 
2018
 
2019
 
2018
Operating revenue:
 
 
 
 
 
 
 
PacifiCorp
$
1,367

 
$
1,369

 
$
3,793

 
$
3,746

MidAmerican Funding
797

 
832

 
2,299

 
2,297

NV Energy
1,054

 
1,059

 
2,389

 
2,426

Northern Powergrid
230

 
233

 
736

 
757

BHE Pipeline Group
226

 
259

 
809

 
871

BHE Transmission
184

 
174

 
527

 
531

BHE Renewables
329

 
320

 
745

 
720

HomeServices
1,307

 
1,218

 
3,419

 
3,252

BHE and Other(1)
150

 
173

 
431

 
470

Total operating revenue
$
5,644

 
$
5,637

 
$
15,148

 
$
15,070

Depreciation and amortization:
 
 
 
 
 
 
 
PacifiCorp
$
272

 
$
203

 
$
686

 
$
602

MidAmerican Funding
184

 
133

 
540

 
499

NV Energy
121

 
114

 
361

 
341

Northern Powergrid
60

 
62

 
186

 
189

BHE Pipeline Group
28

 
27

 
85

 
99

BHE Transmission
59

 
61

 
177

 
184

BHE Renewables
71

 
68

 
210

 
198

HomeServices
11

 
14

 
35

 
37

BHE and Other(1)
—

 
(1
)
 
(2
)
 
(2
)
Total depreciation and amortization
$
806

 
$
681

 
$
2,278

 
$
2,147


 
Three-Month Periods
 
Nine-Month Periods
 
Ended September 30,
 
Ended September 30,
 
2019
 
2018
 
2019
 
2018
Operating income:
 
 
 
 
 
 
 
PacifiCorp
$
333

 
$
386

 
$
885

 
$
917

MidAmerican Funding
234

 
278

 
444

 
444

NV Energy
313

 
307

 
547

 
540

Northern Powergrid
98

 
102

 
337

 
360

BHE Pipeline Group
87

 
105

 
398

 
388

BHE Transmission
91

 
82

 
244

 
244

BHE Renewables
183

 
176

 
298

 
308

HomeServices
113

 
85

 
209

 
185

BHE and Other(1)
(2
)
 
2

 
(34
)
 
(20
)
Total operating income
1,450


1,523

 
3,328


3,366

Interest expense
(475
)
 
(453
)
 
(1,428
)
 
(1,380
)
Capitalized interest
23

 
17

 
56

 
44

Allowance for equity funds
56

 
30

 
126

 
75

Interest and dividend income
25

 
27

 
91

 
85

(Losses) gains on marketable securities, net
(234
)
 
260

 
(296
)
 
(336
)
Other, net
2

 
19

 
67

 
50

Total income before income tax expense and equity income
$
847


$
1,423

 
$
1,944


$
1,904

Interest expense:
 
 
 
 
 
 
 
PacifiCorp
$
101

 
$
96

 
$
299

 
$
288

MidAmerican Funding
74

 
61

 
223

 
185

NV Energy
55

 
52

 
173

 
169

Northern Powergrid
33

 
34

 
102

 
107

BHE Pipeline Group
14

 
11

 
38

 
31

BHE Transmission
40

 
42

 
118

 
127

BHE Renewables
44

 
49

 
132

 
150

HomeServices
6

 
6

 
20

 
16

BHE and Other(1)
108

 
102

 
323

 
307

Total interest expense
$
475

 
$
453

 
$
1,428


$
1,380

Operating revenue by country:
 
 
 
 
 
 
 
United States
$
5,222

 
$
5,209

 
$
13,875

 
$
13,757

United Kingdom
229

 
232

 
734

 
754

Canada
183

 
174

 
526

 
531

Philippines and other
10

 
22

 
13

 
28

Total operating revenue by country
$
5,644

 
$
5,637

 
$
15,148

 
$
15,070

Income before income tax benefit and equity income (loss) by country:
 
 
 
 
 
 
 
United States
$
728

 
$
1,290

 
$
1,546

 
$
1,501

United Kingdom
49

 
59

 
228

 
220

Canada
55

 
43

 
134

 
125

Philippines and other
15

 
31

 
36

 
58

Total income before income tax benefit and equity income (loss) by country
$
847

 
$
1,423

 
$
1,944

 
$
1,904


 
As of
 
September 30,
 
December 31,
 
2019
 
2018
Assets:
 
 
 
PacifiCorp
$
24,789

 
$
23,478

MidAmerican Funding
21,806

 
20,029

NV Energy
14,477

 
14,119

Northern Powergrid
7,334

 
7,427

BHE Pipeline Group
5,775

 
5,511

BHE Transmission
8,692

 
8,424

BHE Renewables
9,650

 
8,666

HomeServices
3,971

 
2,797

BHE and Other(1)
1,419

 
1,738

Total assets
$
97,913

 
$
92,189


(1)
The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, corporate functions and intersegment eliminations.

The following table shows the change in the carrying amount of goodwill by reportable segment for the nine-month period ended September 30, 2019 (in millions):
 
 
 
 
 
 
 
 
 
BHE Pipeline Group
 
 
 
 
 
 
 
 
 
PacifiCorp
 
MidAmerican Funding
 
NV Energy
 
Northern Powergrid
 
 
BHE Transmission
 
BHE Renewables
 
HomeServices
 
 
 
 
 
 
 
 
 
 
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2018
$
1,129

 
$
2,102

 
$
2,369

 
$
952

 
$
73

 
$
1,448

 
$
95

 
$
1,427

 
$
9,595

Acquisitions
—

 
—

 
—

 
—

 
—

 
—

 
—

 
30

 
30

Foreign currency translation
—

 
—

 
—

 
(26
)
 
—

 
44

 
—

 
—

 
18

September 30, 2019
$
1,129

 
$
2,102

 
$
2,369

 
$
926

 
$
73

 
$
1,492

 
$
95

 
$
1,457

 
$
9,643
MidAmerican Energy Company [Member]  
Segment Reporting Information [Line Items]  
Segment Reporting Disclosure [Text Block]
Segment Information

MidAmerican Energy has identified two reportable segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost.

The following tables provide information on a reportable segment basis (in millions):
 
Three-Month Periods
 
Nine-Month Periods
 
Ended September 30,
 
Ended September 30,
 
2019
 
2018
 
2019
 
2018
Operating revenue:
 
 
 
 
 
 
 
Regulated electric
$
712

 
$
727

 
$
1,792

 
$
1,785

Regulated natural gas
76

 
103

 
482

 
505

Other
8

 
2

 
23

 
5

Total operating revenue
$
796

 
$
832

 
$
2,297

 
$
2,295

 
 
 
 
 
 
 
 
Operating income:
 
 
 
 
 
 
 
Regulated electric
$
243

 
$
278

 
$
396

 
$
392

Regulated natural gas
(8
)
 
1

 
45

 
52

Other
(1
)
 
(1
)
 
2

 
—

Total operating income
234

 
278

 
443

 
444

Interest expense
(68
)
 
(56
)
 
(207
)
 
(170
)
Allowance for borrowed funds
7

 
6

 
20

 
14

Allowance for equity funds
27

 
16

 
59

 
39

Other, net
4

 
13

 
34

 
34

Income before income tax benefit
$
204

 
$
257

 
$
349

 
$
361


 
As of
 
September 30,
2019
 
December 31,
2018
Assets:
 
 
 
Regulated electric
$
18,341

 
$
16,511

Regulated natural gas
1,343

 
1,406

Other
10

 
3

Total assets
$
19,694

 
$
17,920
MidAmerican Funding, LLC and Subsidiaries [Domain]  
Segment Reporting Information [Line Items]  
Segment Reporting Disclosure [Text Block]
Segment Information

MidAmerican Funding has identified two reportable segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the financial results and assets of nonregulated operations, MHC and MidAmerican Funding.

The following tables provide information on a reportable segment basis (in millions):
 
Three-Month Periods
 
Nine-Month Periods
 
Ended September 30,
 
Ended September 30,
 
2019
 
2018
 
2019
 
2018
Operating revenue:
 
 
 
 
 
 
 
Regulated electric
$
712

 
$
727

 
$
1,792

 
$
1,785

Regulated natural gas
76

 
103

 
482

 
505

Other
9

 
2

 
25

 
7

Total operating revenue
$
797

 
$
832

 
$
2,299

 
$
2,297

 
 
 
 
 
 
 
 
Operating income:
 
 
 
 
 
 
 
Regulated electric
$
243

 
$
278

 
$
396

 
$
392

Regulated natural gas
(8
)
 
1

 
45

 
52

Other
(1
)
 
(1
)
 
3

 
—

Total operating income
234

 
278

 
444

 
444

Interest expense
(74
)
 
(61
)
 
(223
)
 
(185
)
Allowance for borrowed funds
7

 
6

 
20

 
14

Allowance for equity funds
27

 
16

 
59

 
39

Other, net
5

 
12

 
36

 
35

Income before income tax benefit
$
199

 
$
251

 
$
336

 
$
347


 
As of
 
September 30,
2019
 
December 31,
2018
Assets(1):
 
 
 
Regulated electric
$
19,532

 
$
17,702

Regulated natural gas
1,422

 
1,485

Other
25

 
15

Total assets
$
20,979

 
$
19,202

(1)
Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.
Sierra Pacific Power Company [Member]  
Segment Reporting Information [Line Items]  
Segment Reporting Disclosure [Text Block]
Segment Information

Sierra Pacific has identified two reportable operating segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by the PUCN; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance.

The following tables provide information on a reportable segment basis (in millions):
 
Three-Month Periods
 
Nine-Month Periods
 
Ended September 30,
 
Ended September 30,
 
2019
 
2018
 
2019
 
2018
Operating revenue:
 
 
 
 
 
 
 
Regulated electric
$
232

 
$
225

 
$
586

 
$
575

Regulated natural gas
16

 
14

 
75

 
74

Total operating revenue
$
248

 
$
239

 
$
661

 
$
649

 
 
 
 
 
 
 
 
Operating income:
 
 
 
 
 
 
 
Regulated electric
$
67

 
$
56

 
$
119

 
$
111

Regulated natural gas
—

 
—

 
12

 
11

Total operating income
67

 
56

 
131

 
122

Interest expense
(12
)
 
(12
)
 
(36
)
 
(33
)
Allowance for borrowed funds
—

 
—

 
1

 
1

Allowance for equity funds
—

 
1

 
2

 
3

Other, net
1

 
3

 
4

 
8

Income before income tax expense
$
56

 
$
48

 
$
102

 
$
101


 
As of
 
September 30,
 
December 31,
 
2019
 
2018
Assets:
 
 
 
Regulated electric
$
3,282

 
$
3,177

Regulated natural gas
304

 
314

Regulated common assets(1)
82

 
78

Total assets
$
3,668

 
$
3,569


(1)
Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.