Asset Retirement Obligations - BHE (Details) $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($)
MEC
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligation, liability incurred	$ 88

Amount of asset retirement obligations incurred during the period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

Name:	us-gaap_AssetRetirementObligationLiabilitiesIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration