Revenue from Contracts with Customers - BHE - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Operating revenue	$ 6,229	$ 6,612	$ 12,575	$ 12,642
Real estate
Disaggregation of Revenue [Line Items]
Operating revenue	1,296	1,672	2,171	2,879
HomeServices
Disaggregation of Revenue [Line Items]
Operating revenue	1,296	1,672	2,171	2,879
HomeServices | Real estate
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,217	1,561	2,028	2,673
Other revenue	79	111	143	206
Operating revenue	1,296	1,672	2,171	2,879
HomeServices | Brokerage
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,202	1,544	2,001	2,636
HomeServices | Franchise
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 15	$ 17	$ 27	$ 37