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Segment Information (Tables)
6 Months Ended
Jun. 30, 2016
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information, by Segment
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. Effective January 1, 2016, MidAmerican Energy transferred the assets and liabilities of its unregulated retail services business to MidAmerican Energy Services, LLC, a subsidiary of BHE. Prior period amounts have been changed to reflect this activity in BHE and Other. Information related to the Company's reportable segments is shown below (in millions):
 
Three-Month Periods
 
Six-Month Periods
 
Ended June 30,
 
Ended June 30,
 
2016
 
2015
 
2016
 
2015
Operating revenue:
 
 
 
 
 
 
 
PacifiCorp
$
1,233

 
$
1,269

 
$
2,485

 
$
2,519

MidAmerican Funding
585

 
576

 
1,211

 
1,303

NV Energy
707

 
835

 
1,322

 
1,541

Northern Powergrid
249

 
263

 
528

 
587

BHE Pipeline Group
188

 
208

 
503

 
540

BHE Transmission(1)
(18
)
 
150

 
140

 
275

BHE Renewables
170

 
190

 
309

 
314

HomeServices
841

 
758

 
1,332

 
1,206

BHE and Other(2)
166

 
199

 
332

 
384

Total operating revenue
$
4,121

 
$
4,448

 
$
8,162

 
$
8,669

 
 
 
 
 
 
 
 
Depreciation and amortization:
 
 
 
 
 
 
 
PacifiCorp
$
199

 
$
196

 
$
396

 
$
390

MidAmerican Funding
110

 
99

 
220

 
199

NV Energy
105

 
103

 
209

 
204

Northern Powergrid
50

 
50

 
100

 
98

BHE Pipeline Group
54

 
50

 
107

 
100

BHE Transmission
66

 
53

 
116

 
91

BHE Renewables
56

 
56

 
112

 
105

HomeServices
9

 
6

 
15

 
12

BHE and Other(2)
(1
)
 
(3
)
 
(1
)
 
(2
)
Total depreciation and amortization
$
648

 
$
610

 
$
1,274

 
$
1,197


 
Three-Month Periods
 
Six-Month Periods
 
Ended June 30,
 
Ended June 30,
 
2016
 
2015
 
2016
 
2015
Operating income:
 
 
 
 
 
 
 
PacifiCorp
$
339

 
$
327

 
$
663

 
$
600

MidAmerican Funding
140

 
112

 
240

 
213

NV Energy
173

 
178

 
262

 
299

Northern Powergrid
125

 
130

 
283

 
323

BHE Pipeline Group
60

 
56

 
252

 
256

BHE Transmission(1)
(122
)
 
58

 
(46
)
 
104

BHE Renewables
52

 
66

 
76

 
72

HomeServices
93

 
85

 
92

 
83

BHE and Other(2)
(6
)
 
(5
)
 
(15
)
 
(13
)
Total operating income
854


1,007

 
1,807


1,937

Interest expense
(468
)
 
(476
)
 
(941
)
 
(948
)
Capitalized interest(1)
103

 
22

 
114

 
51

Allowance for equity funds(1)
115

 
30

 
130

 
61

Interest and dividend income
27

 
26

 
54

 
52

Other, net
1

 
10

 
11

 
36

Total income before income tax expense and equity income
$
632


$
619

 
$
1,175


$
1,189

 
Interest expense:
 
 
 
 
 
 
 
PacifiCorp
$
96

 
$
95

 
$
191

 
$
190

MidAmerican Funding
55

 
50

 
109

 
100

NV Energy
63

 
65

 
130

 
128

Northern Powergrid
36

 
36

 
72

 
71

BHE Pipeline Group
13

 
17

 
26

 
35

BHE Transmission
38

 
37

 
74

 
73

BHE Renewables
48

 
49

 
97

 
95

HomeServices

 
1

 
1

 
2

BHE and Other(2)
119

 
126

 
241

 
254

Total interest expense
$
468

 
$
476

 
$
941


$
948

 
Operating revenue by country:
 
 
 
 
 
 
 
United States
$
3,889

 
$
4,032

 
$
7,488

 
$
7,801

United Kingdom
249

 
263

 
528

 
587

Canada(1)
(17
)
 
153

 
143

 
280

Philippines and other

 

 
3

 
1

Total operating revenue by country
$
4,121

 
$
4,448

 
$
8,162

 
$
8,669

 
Income before income tax expense and equity income by country:
 
 
 
 
 
 
 
United States
$
498

 
$
465

 
$
856

 
$
823

United Kingdom
91

 
102

 
210

 
266

Canada
28

 
43

 
71

 
78

Philippines and other
15

 
9

 
38

 
22

Total income before income tax expense and equity income by country
$
632

 
$
619

 
$
1,175

 
$
1,189




 
As of
 
June 30,
 
December 31,
 
2016
 
2015
Total assets:
 
 
 
PacifiCorp
$
23,471

 
$
23,550

MidAmerican Funding
16,643

 
16,315

NV Energy
14,227

 
14,656

Northern Powergrid
6,832

 
7,317

BHE Pipeline Group
5,075

 
4,953

BHE Transmission
8,583

 
7,553

BHE Renewables
6,273

 
5,892

HomeServices
2,079

 
1,705

BHE and Other(2)
1,424

 
1,677

Total assets
$
84,607

 
$
83,618


(1)
Refer to Note 4 for information regarding certain regulatory matters impacting AltaLink's financial results for the three- and six-month periods ended June 30, 2016.
(2)
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.
Schedule of Goodwill
The following table shows the change in the carrying amount of goodwill by reportable segment for the six-month period ended June 30, 2016 (in millions):
 
 
 
 
 
 
 
 
 
BHE
 
 
 
 
 
 
 
BHE
 
 
 
 
 
MidAmerican
 
NV
 
Northern
 
Pipeline
 
BHE
 
BHE
 
Home-
 
and
 
 
 
PacifiCorp
 
Funding
 
Energy
 
Powergrid
 
Group
 
Transmission
 
Renewables
 
Services
 
Other
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2015
$
1,129

 
$
2,102

 
$
2,369

 
$
1,056

 
$
101

 
$
1,428

 
$
95

 
$
794

 
$
2

 
$
9,076

Acquisitions

 

 

 

 

 
5

 

 
45

 

 
50

Foreign currency translation

 

 

 
(75
)
 

 
100

 

 

 
1

 
26

Other

 

 

 

 
(13
)
 

 

 

 

 
(13
)
June 30, 2016
$
1,129

 
$
2,102

 
$
2,369

 
$
981

 
$
88

 
$
1,533

 
$
95

 
$
839

 
$
3

 
$
9,139

MidAmerican Energy Company [Member]  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information, by Segment
The following tables provide information on a reportable segment basis (in millions):
 
Three-Month Periods
 
Six-Month Periods
 
Ended June 30,
 
Ended June 30,
 
2016
 
2015
 
2016
 
2015
Operating revenue:
 
 
 
 
 
 
 
Regulated electric
$
481

 
$
461

 
$
880

 
$
887

Regulated gas
102

 
110

 
328

 
405

Other
1

 
1

 
1

 
2

Total operating revenue
$
584

 
$
572

 
$
1,209

 
$
1,294

 
 
 
 
 
 
 
 
Depreciation and amortization:
 
 
 
 
 
 
 
Regulated electric
$
100

 
$
89

 
$
199

 
$
179

Regulated gas
10

 
10

 
21

 
20

Total depreciation and amortization
$
110

 
$
99

 
$
220

 
$
199

 
 

 
 

 
 

 
 

Operating income:
 
 
 
 
 
 
 
Regulated electric
$
135

 
$
108

 
$
192

 
$
161

Regulated gas
4

 
4

 
47

 
51

Total operating income
$
139

 
$
112

 
$
239

 
$
212


 
As of
 
June 30,
2016
 
December 31,
2015
Total assets:
 
 
 
Regulated electric
$
13,325

 
$
12,970

Regulated gas
1,200

 
1,251

Other(1)
1

 
164

Total assets
$
14,526

 
$
14,385


(1)
Other total assets for December 31, 2015, includes amounts for MidAmerican Energy's unregulated retail services business transferred to a subsidiary of BHE.
MidAmerican Funding, LLC and Subsidiaries [Domain]  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information, by Segment
The following tables provide information on a reportable segment basis (in millions):
 
Three-Month Periods
 
Six-Month Periods
 
Ended June 30,
 
Ended June 30,
 
2016
 
2015
 
2016
 
2015
Operating revenue:
 
 
 
 
 
 
 
Regulated electric
$
481

 
$
461

 
$
880

 
$
887

Regulated gas
102

 
110

 
328

 
405

Other
2

 
5

 
3

 
11

Total operating revenue
$
585

 
$
576

 
$
1,211

 
$
1,303

 
 
 
 
 
 
 
 
Depreciation and amortization:
 
 
 
 
 
 
 
Regulated electric
$
100

 
$
89

 
$
199

 
$
179

Regulated gas
10

 
10

 
21

 
20

Total depreciation and amortization
$
110

 
$
99

 
$
220

 
$
199

 
 
 
 
 
 
 
 
Operating income:
 
 
 
 
 
 
 
Regulated electric
$
135

 
$
108

 
$
192

 
$
161

Regulated gas
4

 
4

 
47

 
51

Other
1

 

 
1

 
1

Total operating income
$
140

 
$
112

 
$
240

 
$
213

 
As of
 
June 30,
2016
 
December 31,
2015
Total assets(1):
 
 
 
Regulated electric
$
14,516

 
$
14,161

Regulated gas
1,279

 
1,330

Other
21

 
183

Total assets
$
15,816

 
$
15,674

(1)
Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units. Other total assets for December 31, 2015, includes amounts for MidAmerican Energy's unregulated retail services business transferred to a subsidiary of BHE.
Sierra Pacific Power Company [Member]  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information, by Segment
The following tables provide information on a reportable segment basis (in millions):
 
Three-Month Periods
 
Six-Month Periods
 
Ended June 30,
 
Ended June 30,
 
2016
 
2015
 
2016
 
2015
Operating revenue:
 
 
 
 
 
 
 
Regulated electric
$
162

 
$
201

 
$
332

 
$
397

Regulated gas
19

 
26

 
66

 
76

Total operating revenue
$
181

 
$
227

 
$
398

 
$
473

 
 
 
 
 
 
 
 
Cost of sales:
 
 
 
 
 
 
 
Regulated electric
$
65

 
$
101

 
$
135

 
$
198

Regulated gas
7

 
15

 
37

 
50

Total cost of sales
$
72

 
$
116

 
$
172

 
$
248

 
 
 
 
 
 
 
 
Gross margin:
 
 
 
 
 
 
 
Regulated electric
$
97

 
$
100

 
$
197

 
$
199

Regulated gas
12

 
11

 
29

 
26

Total gross margin
$
109

 
$
111

 
$
226

 
$
225

 
 
 
 
 
 
 
 
Operating and maintenance:
 
 
 
 
 
 
 
Regulated electric
$
40

 
$
36

 
$
76

 
$
69

Regulated gas
5

 
4

 
10

 
8

Total operating and maintenance
$
45

 
$
40

 
$
86

 
$
77

 
 
 
 
 
 
 
 
Depreciation and amortization:
 
 
 
 
 
 
 
Regulated electric
$
25

 
$
24

 
$
50

 
$
48

Regulated gas
4

 
4

 
8

 
8

Total depreciation and amortization
$
29

 
$
28

 
$
58

 
$
56

 
 
 
 
 
 
 
 
Operating income:
 
 
 
 
 
 
 
Regulated electric
$
26

 
$
34

 
$
59

 
$
71

Regulated gas
2

 
3

 
10

 
9

Total operating income
$
28

 
$
37

 
$
69

 
$
80

 
 
 
 
 
 
 
 
Interest expense:
 
 
 
 
 
 
 
Regulated electric
$
13

 
$
14

 
$
27

 
$
28

Regulated gas
1

 
1

 
3

 
2

Total interest expense
$
14

 
$
15

 
$
30

 
$
30


 
 
 
As of
 
 
 
 
 
June 30,
 
December 31,
 
 
 
 
 
2016
 
2015
Total assets:
 
 
 
 
 
 
 
Regulated electric
 
 
 
 
$
3,059

 
$
3,060

Regulated gas
 
 
 
 
316

 
316

Regulated common assets(1)
 
 
 
 
75

 
111

Total assets
 
 
 
 
$
3,450

 
$
3,487


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