Revenue from Contracts with Customers - BHE - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 4,745	$ 4,199	$ 9,464	$ 8,911
Operating revenue	6,612	6,064	12,642	12,145
Real estate
Disaggregation of Revenue [Line Items]
Operating revenue	1,672	1,763	2,879	2,995
Other revenue
Disaggregation of Revenue [Line Items]
Operating revenue	195	102	299	239
HomeServices
Disaggregation of Revenue [Line Items]
Operating revenue	1,672	1,763	2,879	2,995
HomeServices | Real estate
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,561	1,593	2,673	2,633
Operating revenue	1,672	1,763	2,879	2,995
HomeServices | Brokerage
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,544	1,569	2,636	2,591
HomeServices | Franchise
Disaggregation of Revenue [Line Items]
Total Customer Revenue	17	24	37	42
HomeServices | Other revenue
Disaggregation of Revenue [Line Items]
Operating revenue	$ 111	$ 170	$ 206	$ 362