Commitments and Contingencies.

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Loss contingency accrual interest rate.

+ References

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Loss contingency, number of cases.

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Loss contingency number of class members.

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Loss contingency number of jury verdicts.

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Loss contingency, number of trials.

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Multiplier used to determine economic and Non-economic damages.

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Number of acres burned.

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Number of fatalities in wildfire.

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Number of injuries in wildfire.

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Number of structures damaged.

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Number of structures destroyed.

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Number of wildfires associated to complaints.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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-URI https://asc.fasb.org//1943274/2147483076/450-20-50-9

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-3

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-URI https://asc.fasb.org//1943274/2147482425/460-10-50-2

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

+ References

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-4

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (g)
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-Topic 230
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Amount of purchase arrangement to be paid in fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of purchase arrangement to be paid in fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of purchase arrangement to be paid in third fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Contingencies and commitments - Narrative (Detail)					1 Months Ended				6 Months Ended	12 Months Ended
Contingencies and commitments - Narrative (Detail)	Feb. 13, 2024 Plaintiff	Feb. 01, 2024 USD ($)	Oct. 31, 2023 USD ($) Cases	Jul. 29, 2022 a Structure People	Jan. 31, 2024 USD ($) Plaintiff People	Sep. 30, 2023 Trial ClassMember	Jun. 30, 2023 USD ($) Wildfire Plaintiff	Sep. 30, 2020 a Structure	Jun. 30, 2023 People	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Commitments and Contingencies [Line Items]
Purchase commitments - 2024										$ 10,000,000,000
Purchase commitments - 2025										4,000,000,000
Purchase commitments - 2026										3,000,000,000
Purchase commitments - 2027										3,000,000,000
Purchase commitments - 2028										$ 2,000,000,000
Multnomah County Circuit Court Oregon [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Loss contingency, accrual interest rate					9.00%
Subsidiaries [Member] \| Berkshire Hathaway Energy [Member]
Commitments and Contingencies [Line Items]
Percentage of subsidiary ownership										92.00%
Berkshire Hathaway Energy Company [Member] \| 2020 Wildfires [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Number of jury verdicts \| People					2
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Wildfires [Member]
Commitments and Contingencies [Line Items]
Estimated pre-tax probable loss										$ 2,400,000,000
Loss contingency, pre tax probable loss before insurance recoveries										1,900,000,000	$ 225,000,000
Loss contingency, probable losses net of expected insurance recoveries										1,700,000,000	64,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| 2020 Wildfires [Member]
Commitments and Contingencies [Line Items]
Legal settlements amount paid										631,000,000	$ 53,000,000
Number of named plaintiffs \| Plaintiff							17
Loss contingency, sought amount										8,000,000,000
Loss contingency, awarded value							$ 90,000,000
Number of structures destroyed \| Structure								2,000
Number of jury verdicts \| People									2
Multiplier used to determine economic and non-economic damages									0.25
Number of wildfires associated to complaints \| Wildfire							4
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| 2020 Wildfires [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Number of named plaintiffs \| Plaintiff					9
Loss contingency, awarded value					$ 62,000,000
Multiplier used to determine economic and non-economic damages					0.25
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| 2022 Wildfire [Member]
Commitments and Contingencies [Line Items]
Number of acres aggregate of wildfire \| a				60,000
Number of structures destroyed \| Structure				185
Number of structures damaged \| Structure				11
Number of injuries in wildfire \| People				12
Number of fatalities in wildfire \| People				4
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Multnomah County Circuit Court Oregon 10 Class Members [Member]
Commitments and Contingencies [Line Items]
Loss contingency, number of trials \| Trial						2
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Multnomah County Circuit Court Oregon [Member]
Commitments and Contingencies [Line Items]
Loss contingency, number of trials \| Trial						3
Loss contingency number of class members \| ClassMember						10
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Multnomah County Circuit Court Oregon [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Number of named plaintiffs \| Plaintiff					9
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Economic Damages [Member] \| 2020 Wildfires [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value		$ 12,000,000			$ 6,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Economic and Property Damages [Member] \| 2020 Wildfires [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value							$ 4,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Non-Economic Damages [Member] \| 2020 Wildfires [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value							68,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Non-Economic Damages [Member] \| 2020 Wildfires [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value					$ 56,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Punitive Damages [Member] \| 2020 Wildfires [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value							$ 18,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Punitive Damages [Member] \| 2020 Wildfires [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value		$ 16,000,000
Berkshire Hathaway Energy Company [Member] \| PacifiCorp [Member] \| Cross-appeal to January 2024 Limited Judgment and Money Award [Member] \| 2020 Wildfires [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Number of named plaintiffs \| Plaintiff	17
Berkshire Hathaway Energy Company [Member] \| HomeServices of America [Member] \| Antitrust Cases [Member]
Commitments and Contingencies [Line Items]
Loss contingency, sought amount										9,000,000,000
Number of cases \| Cases			11
Berkshire Hathaway Energy Company [Member] \| HomeServices of America [Member] \| Antitrust Cases [Member] \| Inestimable Loss [Member]
Commitments and Contingencies [Line Items]
Number of cases \| Cases			10
Berkshire Hathaway Energy Company [Member] \| HomeServices of America [Member] \| Antitrust Cases [Member] \| Trial Commenced [Member]
Commitments and Contingencies [Line Items]
Loss contingency, awarded value			$ 1,800,000,000
Number of cases \| Cases			1
Berkshire Hathaway Energy Company [Member] \| Minimum [Member] \| PacifiCorp [Member] \| 2020 Wildfires [Member]
Commitments and Contingencies [Line Items]
Number of acres aggregate of wildfire \| a								500,000
Berkshire Hathaway Energy Company [Member] \| Maximum [Member] \| HomeServices of America [Member] \| Antitrust Cases [Member] \| Trial Commenced [Member]
Commitments and Contingencies [Line Items]
Estimated pre-tax probable loss										$ 5,400,000,000