Employee Benefit Plans - BHE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 4	$ 3	$ 6
Interest cost	7	5	14	10
Expected return on plan assets	(10)	(7)	(18)	(14)
Net amortization	0	(1)	(1)	(1)
Net periodic benefit (credit) cost	(1)	1	(2)	1
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	6	9	13
Interest cost	27	19	55	38
Expected return on plan assets	(31)	(27)	(62)	(54)
Settlement	0	0	(5)	2
Net amortization	3	5	7	9
Net periodic benefit (credit) cost	4	3	4	8
United Kingdom | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	3	3	7
Interest cost	14	9	28	19
Expected return on plan assets	(21)	(23)	(40)	(48)
Net amortization	7	6	13	12
Net periodic benefit (credit) cost	$ 1	$ (5)	$ 4	$ (10)