Summary of Significant Accounting Policies - BHE - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Inventory, other fossil fuel	$ 296	$ 382
Inventory, raw materials and supplies, gross	826	786
Replacement cost of inventory, higher (lower)	27	10
Goodwill impairment	0	0	$ 0
Unbilled revenue	$ 718	$ 750

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- Definition

Amount of fossil fuel included in inventory classified as other.

+ References

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- Definition

The excess of replacement or current cost over the stated LIFO (last in first out) inventory value when the LIFO inventory method is utilized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

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