Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Liabilities, Net		$ 8,242	$ 13,879
Regulatory Liabilities		7,511	3,120
Current assets:
Cash and cash equivalents		935	721
Restricted Cash and Investments, Current		327	211
Trade receivables, net		2,014	1,751
Income taxes receivable		334	0
Inventories
Fuel		352	402
Inventories		888	925
Mortgage loans held for sale		465	359
Regulatory assets		189	150
Other current assets		815	706
Total current assets		5,778	4,673
Property, plant and equipment, net		65,871	62,509
Goodwill		9,678	9,010
Regulatory assets		2,761	4,307
Investments and restricted cash and investments		4,872	3,945
Other assets		1,248	996
Total assets		90,208	85,440
Current liabilities:
Accounts payable		1,519	1,317
Accrued interest		488	454
Accrued property, income and other taxes		354	389
Accrued employee expenses		274	261
Regulatory liabilities		202	187
Short-term debt	[1]	4,488	1,869
Current portion of long-term debt		3,431	1,006
Other current liabilities		1,049	1,017
Total current liabilities		11,603	6,313
BHE senior debt		5,452	7,418
Regulatory liabilities		7,309	2,933
BHE junior subordinated debentures		100	944
Subsidiary debt		26,210	26,748
Deferred income taxes		8,242	13,879
Other long-term liabilities		2,984	2,742
Asset Retirement Obligations, Noncurrent		894	856
Total liabilities		61,900	60,977
Commitments and contingencies
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,368	6,390
Retained earnings		22,206	19,448
Accumulated other comprehensive loss, net		(398)	(1,511)
Total shareholders' equity		28,176	24,327
Noncontrolling interests		132	136
Total equity		28,308	24,463
Total liabilities and equity		90,208	85,440
Sierra Pacific Power Company [Member]
Deferred Tax Liabilities, Net		330	617
Regulatory Liabilities		500	290
Current assets:
Cash and cash equivalents		4	55
Trade receivables, net		112	117
Inventories
Fuel		7	9
Inventories		49	45
Regulatory assets		32	25
Other current assets		17	13
Total current assets		214	255
Public Utilities, Property, Plant and Equipment, Net		2,892	2,822
Regulatory assets		300	410
Other assets		7	6
Total assets		3,413	3,493
Current liabilities:
Accounts payable		92	146
Accrued interest		14	14
Accrued property, income and other taxes		10	10
Regulatory liabilities		19	69
Long-term Debt and Capital and Financial Lease Obligations, Current		2	1
Customer Deposits, Current		15	16
Other current liabilities		12	12
Total current liabilities		164	268
Regulatory liabilities		481	221
Long-term Debt and Capital and Financial Lease Obligations		1,152	1,152
Deferred income taxes		330	617
Other long-term liabilities		114	127
Asset Retirement Obligations, Noncurrent		10	10
Total liabilities		2,241	2,385
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		1,111	1,111
Retained earnings		62	(2)
Accumulated other comprehensive loss, net		(1)	(1)
Total shareholders' equity		1,172	1,108
Total liabilities and equity		3,413	3,493
PacifiCorp [Member]
Deferred Tax Liabilities, Net		2,582	4,880
Regulatory Liabilities		3,071	1,032
Current assets:
Cash and cash equivalents		14	17
Trade receivables, net		684	728
Income taxes receivable		59	17
Inventories
Materials and supplies		235	228
Fuel		198	215
Inventories		433	443
Regulatory assets		31	53
Prepaid Expense, Current		73	64
Other current assets		21	32
Total current assets		1,315	1,354
Public Utilities, Property, Plant and Equipment, Net		19,203	19,162
Regulatory assets		1,030	1,490
Other assets		372	388
Total assets		21,920	22,394
Current liabilities:
Accounts payable		453	408
Accrued interest		115	115
Accrued property, income and other taxes		66	63
Accrued employee expenses		70	67
Regulatory liabilities		75	54
Short-term debt		80	270
Current portion of long-term debt and capital lease obligations		588	58
Other current liabilities		170	164
Total current liabilities		1,617	1,199
Regulatory liabilities		2,996	978
Long-term debt and capital lease obligations		6,437	7,021
Deferred income taxes		2,582	4,880
Other long-term liabilities		733	926
Asset Retirement Obligations, Noncurrent		190	194
Total liabilities		14,365	15,004
Commitments and contingencies
Shareholders' equity:
Preferred stock		2	2
Common stock		0	0
Additional paid-in capital		4,479	4,479
Retained earnings		3,089	2,921
Accumulated other comprehensive loss, net		(15)	(12)
Total shareholders' equity		7,555	7,390
Total liabilities and equity		21,920	22,394
MidAmerican Energy Company [Member]
Deferred Tax Liabilities, Net		2,237	3,572
Current assets:
Cash and cash equivalents		172	14
Receivables, Net, Current		344	285
Income taxes receivable		51	9
Inventories
Inventories		245	264
Other current assets		134	35
Total current assets		946	607
Public Utilities, Property, Plant and Equipment, Net		14,207	12,821
Regulatory assets		204	1,161
Investments and restricted cash and investments		728	653
Other assets		233	217
Total assets		16,318	15,459
Current liabilities:
Accounts payable		452	303
Accrued interest		48	45
Accrued property, income and other taxes		132	137
Short-term debt		0	99
Current portion of long-term debt and capital lease obligations		350	250
Other current liabilities		128	159
Total current liabilities		1,110	993
Regulatory liabilities		1,661	883
Long-term debt and capital lease obligations		4,692	4,051
Deferred income taxes		2,237	3,572
Other long-term liabilities		326	290
Asset Retirement Obligations, Noncurrent		528	510
Total liabilities		10,554	10,299
Commitments and contingencies
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		561	561
Retained earnings		5,203	4,599
Total shareholders' equity		5,764	5,160
Total liabilities and equity		16,318	15,459
MidAmerican Funding, LLC and Subsidiaries [Domain]
Deferred Tax Liabilities, Net		2,235	3,568
Current assets:
Cash and cash equivalents		172	15
Receivables, Net, Current		348	287
Income taxes receivable		64	9
Inventories
Inventories		245	264
Other current assets		134	35
Total current assets		963	610
Property, plant and equipment, net		14,221	12,835
Goodwill		1,270	1,270
Regulatory assets		204	1,161
Investments and restricted cash and investments		730	655
Other assets		233	216
Total assets		17,621	16,747
Current liabilities:
Accounts payable		451	302
Accrued interest		53	52
Accrued property, income and other taxes		133	138
Notes Payable, Related Parties, Current		164	31
Short-term debt		0	99
Current portion of long-term debt and capital lease obligations		350	250
Other current liabilities		128	160
Total current liabilities		1,279	1,032
Regulatory liabilities		1,661	883
Long-term debt and capital lease obligations		4,932	4,377
Deferred income taxes		2,235	3,568
Other long-term liabilities		326	291
Asset Retirement Obligations, Noncurrent		528	510
Total liabilities		10,961	10,661
Commitments and contingencies
Shareholders' equity:
Additional paid-in capital		1,679	1,679
Retained earnings		4,981	4,407
Total shareholders' equity		6,660	6,086
Total liabilities and equity		17,621	16,747
Nevada Power Company [Member]
Deferred Tax Liabilities, Net		767	1,474
Regulatory Liabilities		1,121	453
Current assets:
Cash and cash equivalents		57	279
Trade receivables, net		238	243
Inventories
Fuel		3	13
Inventories		59	73
Regulatory assets		28	20
Other current assets		44	38
Total current assets		426	653
Public Utilities, Property, Plant and Equipment, Net		6,877	6,997
Regulatory assets		941	1,000
Other assets		35	39
Total assets		8,279	8,689
Current liabilities:
Accounts payable		156	187
Accrued interest		50	50
Accrued property, income and other taxes		63	93
Regulatory liabilities		91	37
Long-term Debt and Capital and Financial Lease Obligations, Current		842	17
Customer Deposits, Current		73	78
Other current liabilities		16	39
Total current liabilities		1,291	501
Regulatory liabilities		1,030	416
Long-term Debt and Capital and Financial Lease Obligations		2,233	3,049
Deferred income taxes		767	1,474
Other long-term liabilities		280	277
Asset Retirement Obligations, Noncurrent		76	63
Total liabilities		5,601	5,717
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		2,308	2,308
Retained earnings		374	667
Accumulated other comprehensive loss, net		(4)	(3)
Total shareholders' equity		2,678	2,972
Total liabilities and equity		8,279	8,689
Parent Company [Member]
Current assets:
Cash and cash equivalents		346	33
Trade receivables, net		0	21
Inventories
Other current assets		21	2
Total current assets		818	161
Goodwill		1,221	1,221
Other assets		1,155	1,171
Total assets		39,330	37,291
Current liabilities:
Notes Payable, Related Parties, Current		182	194
Short-term debt		3,331	834
Total current liabilities		4,781	1,785
BHE senior debt		5,452	7,418
BHE junior subordinated debentures		100	944
Notes payable - affiliate		1	1,859
Other long-term liabilities		800	942
Total liabilities		11,134	12,948
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,368	6,390
Retained earnings		22,206	19,448
Accumulated other comprehensive loss, net		(398)	(1,511)
Total shareholders' equity		28,176	24,327
Noncontrolling interests		20	16
Total equity		28,196	24,343
Total liabilities and equity		39,330	37,291
Deferred Income Taxes [Member]
Regulatory Liabilities	[2]	4,143	25
Deferred Income Taxes [Member] | PacifiCorp [Member]
Regulatory Liabilities		1,960	9
Deferred Income Taxes [Member] | MidAmerican Energy Company [Member]
Current liabilities:
Regulatory liabilities	[3]	681	0
Deferred Income Taxes [Member] | Nevada Power Company [Member]
Regulatory Liabilities	[4]	$ 670	$ 9

[1] (1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

[2] (1)Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. See Note 11 for further discussion of 2017 Tax Reform impacts.

[3] (3)Amount predominantly represents the excess of nuclear decommission trust assets over the related asset retirement obligation. Refer to Note 12 for a discussion of asset retirement obligations.

[4] (1)Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. See Note 10 for further discussion of 2017 Tax Reform impacts.