Revenue from Contracts with Customers - BHE - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Operating revenue	$ 6,686	$ 6,394	$ 13,358	$ 12,760
Real estate
Disaggregation of Revenue [Line Items]
Operating revenue	1,273	1,264	2,135	2,124
HomeServices \| Real estate
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,184	1,175	1,975	1,966
Other revenue	89	89	160	158
Operating revenue	1,273	1,264	2,135	2,124
HomeServices \| Brokerage
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,169	1,161	1,947	1,942
HomeServices \| Franchise
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 15	$ 14	$ 28	$ 24

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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