Commitments and Contingencies - Commitments (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Equity Method Investments	$ 5,843	$ 3,947
Property, plant and equipment, net	75,252	$ 73,305
PacifiCorp [Member] \| Klamath Hydroelectric System [Member]
Property, Plant and Equipment [Abstract]
Dam removal cost limit	200
PacifiCorp [Member] \| Klamath Hydroelectric System [Member] \| CALIFORNIA
Property, Plant and Equipment [Abstract]
Dam removal cost limit	16
Additional dam removal costs, California bond measure	250
Capital Addition Purchase Commitments [Member] \| MidAmerican Energy Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	274
Maintenance, service and other contracts [Member] \| MidAmerican Energy Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 75
Counterparty Bankruptcy [Member] \| Topaz [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Entity Legal Form	1
Property, Plant and Equipment [Abstract]
Revenue, Performance Obligation, Description of Payment Terms	1
Counterparty Bankruptcy [Member] \| Agua Caliente [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Equity Method Investment, Ownership Percentage	49.00%
Property, Plant and Equipment [Abstract]
Revenue, Performance Obligation, Description of Payment Terms	1
Easements [Member] \| MidAmerican Energy Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 102

The additional amount for dam removal costs expected to be raised through a California bond measure.

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[Line Items] for Disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet and the combined aggregate amount of maturities of known contractual obligations.

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The maximum amount of dam removal costs.

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The details of the entity's legal form. Examples are partnership, limited liability company, trust, etc.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration.

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