Segment Information - BHE - Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2021 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 11,506
Acquisitions	70
Foreign currency translation	(4)
Ending balance	11,572
PAC
Goodwill [Roll Forward]
Beginning balance	1,129
Acquisitions	0
Foreign currency translation	0
Ending balance	1,129
MidAmerican Funding
Goodwill [Roll Forward]
Beginning balance	2,102
Acquisitions	0
Foreign currency translation	0
Ending balance	2,102
NV Energy
Goodwill [Roll Forward]
Beginning balance	2,369
Acquisitions	0
Foreign currency translation	0
Ending balance	2,369
Northern Powergrid
Goodwill [Roll Forward]
Beginning balance	1,000
Acquisitions	0
Foreign currency translation	(10)
Ending balance	990
BHE Pipeline Group
Goodwill [Roll Forward]
Beginning balance	1,803
Acquisitions	11
Foreign currency translation	0
Ending balance	1,814
BHE Transmission
Goodwill [Roll Forward]
Beginning balance	1,551
Acquisitions	0
Foreign currency translation	6
Ending balance	1,557
BHE Renewables
Goodwill [Roll Forward]
Beginning balance	95
Acquisitions	0
Foreign currency translation	0
Ending balance	95
HomeServices
Goodwill [Roll Forward]
Beginning balance	1,457
Acquisitions	59
Foreign currency translation	0
Ending balance	$ 1,516

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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