Jointly Owned Utility Facilities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Jointly Owned Utility Plant Interests [Line Items]
Facility in Service	$ 8,732
Accumulated Depreciation and Amortization	3,718
Construction Work in Progress	247
PacifiCorp [Member]
Jointly Owned Utility Plant Interests [Line Items]
Facility in Service	3,542
Accumulated Depreciation and Amortization	1,496
Construction Work in Progress	146
PacifiCorp [Member] | Jim Bridger Nos. 1-4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	67.00%
Facility in Service	1,134
Accumulated Depreciation and Amortization	554
Construction Work in Progress	116
PacifiCorp [Member] | Hunter No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	94.00%
Facility in Service	467
Accumulated Depreciation and Amortization	144
Construction Work in Progress	0
PacifiCorp [Member] | Hunter No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	60.00%
Facility in Service	290
Accumulated Depreciation and Amortization	88
Construction Work in Progress	1
PacifiCorp [Member] | Wyodak [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	80.00%
Facility in Service	450
Accumulated Depreciation and Amortization	183
Construction Work in Progress	5
PacifiCorp [Member] | Colstrip Nos. 3 and 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	10.00%
Facility in Service	231
Accumulated Depreciation and Amortization	125
Construction Work in Progress	1
PacifiCorp [Member] | Hermiston [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	50.00%	[1]
Facility in Service	175	[1]
Accumulated Depreciation and Amortization	67	[1]
Construction Work in Progress	1	[1]
Percentage Of Remaining Output The Entity Has Contracted To Purchase	50.00%
PacifiCorp [Member] | Craig Nos. 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	19.00%
Facility in Service	323
Accumulated Depreciation and Amortization	203
Construction Work in Progress	7
PacifiCorp [Member] | Hayden No. 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	25.00%
Facility in Service	55
Accumulated Depreciation and Amortization	27
Construction Work in Progress	12
PacifiCorp [Member] | Hayden No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	13.00%
Facility in Service	33
Accumulated Depreciation and Amortization	18
Construction Work in Progress	3
PacifiCorp [Member] | Foote Creek [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	79.00%
Facility in Service	37
Accumulated Depreciation and Amortization	22
Construction Work in Progress	0
PacifiCorp [Member] | Transmission and distribution facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	Various
Facility in Service	347
Accumulated Depreciation and Amortization	65
Construction Work in Progress	0
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Facility in Service	3,876
Accumulated Depreciation and Amortization	1,612
Construction Work in Progress	63
MidAmerican Energy Company [Member] | Transmission and distribution facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	Various
Facility in Service	243
Accumulated Depreciation and Amortization	81
Construction Work in Progress	17
MidAmerican Energy Company [Member] | Louisa No. 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	88.00%
Facility in Service	747
Accumulated Depreciation and Amortization	392
Construction Work in Progress	4
MidAmerican Energy Company [Member] | Quad Cities Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	25.00%	[2]
Facility in Service	656	[2]
Accumulated Depreciation and Amortization	316	[2]
Construction Work in Progress	27	[2]
MidAmerican Energy Company [Member] | Walter Scott, Jr. No. 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	79.00%
Facility in Service	561
Accumulated Depreciation and Amortization	287
Construction Work in Progress	7
MidAmerican Energy Company [Member] | Walter Scott, Jr. No. 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	60.00%	[3]
Facility in Service	446	[3]
Accumulated Depreciation and Amortization	82	[3]
Construction Work in Progress	3	[3]
Revenue Sharing Credits Netted Against Facility In Service	320
Revenue Sharing Credits Netted Against Accumulated Depreciation	60
MidAmerican Energy Company [Member] | George Neal No. 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	41.00%
Facility in Service	303
Accumulated Depreciation and Amortization	142
Construction Work in Progress	0
MidAmerican Energy Company [Member] | Ottumwa No. 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	52.00%
Facility in Service	530
Accumulated Depreciation and Amortization	171
Construction Work in Progress	2
MidAmerican Energy Company [Member] | George Neal No. 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	72.00%
Facility in Service	390
Accumulated Depreciation and Amortization	141
Construction Work in Progress	3
NV Energy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Facility in Service	1,003
Accumulated Depreciation and Amortization	435
Construction Work in Progress	36
NV Energy [Member] | Transmission and distribution facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	Various
Facility in Service	221
Accumulated Depreciation and Amortization	32
Construction Work in Progress	2
NV Energy [Member] | Navajo [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	11.00%
Facility in Service	198
Accumulated Depreciation and Amortization	135
Construction Work in Progress	2
NV Energy [Member] | Silverhawk [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	75.00%
Facility in Service	241
Accumulated Depreciation and Amortization	55
Construction Work in Progress	5
NV Energy [Member] | Valmy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	50.00%
Facility in Service	343
Accumulated Depreciation and Amortization	213
Construction Work in Progress	27
BHE Pipeline Group [Member] | BHE Pipeline Group - common facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Company Share	Various
Facility in Service	311
Accumulated Depreciation and Amortization	175
Construction Work in Progress	$ 2

[1] PacifiCorp has contracted to purchase the remaining 50% of the output of the Hermiston generating facility.

[2] Includes amounts related to nuclear fuel.

[3] Facility in-service and accumulated depreciation and amortization amounts are net of credits applied under Iowa revenue sharing arrangements totaling $320 million and $60 million, respectively.