Jointly Owned Utility Facilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 9,651
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4,353
Construction Work in Progress	183
PacifiCorp [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,425
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	1,872
Construction Work in Progress	$ 96
PacifiCorp [Member] | Jim Bridger Unit Nos 1 thru 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	67.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 1,442
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	616
Construction Work in Progress	$ 12
PacifiCorp [Member] | Hunter Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	94.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 474
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	172
Construction Work in Progress	$ 7
PacifiCorp [Member] | Hunter No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	60.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 297
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	106
Construction Work in Progress	$ 1
PacifiCorp [Member] | Wyodak [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	80.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 469
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	216
Construction Work in Progress	$ 1
PacifiCorp [Member] | Colstrip Unit Nos 3 and 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	10.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 247
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	131
Construction Work in Progress	$ 4
PacifiCorp [Member] | Hermiston [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 180
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	81
Construction Work in Progress	$ 1
PacifiCorp [Member] | Craig Units Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	19.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 365
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	231
Construction Work in Progress	$ 3
PacifiCorp [Member] | Hayden Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 74
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	34
Construction Work in Progress	$ 0
PacifiCorp [Member] | Hayden No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	13.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 43
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	21
Construction Work in Progress	$ 0
PacifiCorp [Member] | Foote Creek [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	79.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 40
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	26
Construction Work in Progress	$ 0
PacifiCorp [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Percentage Share	Various
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 794
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	238
Construction Work in Progress	67
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,126
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	1,882
Construction Work in Progress	$ 86
MidAmerican Energy Company [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Percentage Share	Various
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 249
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	87
Construction Work in Progress	$ 1
MidAmerican Energy Company [Member] | Louisa Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	88.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 807
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	432
Construction Work in Progress	$ 8
MidAmerican Energy Company [Member] | Quad Cities Unit Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%	[1]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 698	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	387	[1]
Construction Work in Progress	$ 20	[1]
MidAmerican Energy Company [Member] | Walter Scott, Jr. No. 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	79.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 617
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	316
Construction Work in Progress	$ 8
MidAmerican Energy Company [Member] | Walter Scott Jr Unit No 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	60.00%	[2]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 456	[2]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	112	[2]
Construction Work in Progress	1	[2]
Revenue sharing credits netted against facility in service	319
Revenue sharing credits netted against accumulated depreciation	$ 81
MidAmerican Energy Company [Member] | George Neal No. 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	41.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 307
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	159
Construction Work in Progress	$ 1
MidAmerican Energy Company [Member] | Ottumwa Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	52.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 567
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	206
Construction Work in Progress	$ 40
MidAmerican Energy Company [Member] | George Neal Unit No 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	72.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 425
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	183
Construction Work in Progress	7
NV Energy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	814
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	430
Construction Work in Progress	$ 1
NV Energy [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Percentage Share	Various
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 206
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	45
Construction Work in Progress	$ 0
NV Energy [Member] | Navajo Generating Station [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	11.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 220
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	152
Construction Work in Progress	$ 0
NV Energy [Member] | Valmy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 388
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	233
Construction Work in Progress	$ 1
BHE Pipeline Group [Member] | BHE Pipeline Group - common facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Percentage Share	Various
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 286
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	169
Construction Work in Progress	$ 0

[1] Includes amounts related to nuclear fuel.

[2] Facility in-service and accumulated depreciation and amortization amounts are net of credits applied under Iowa revenue sharing arrangements totaling $319 million and $81 million, respectively.