Employee Benefit Plans - BHE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 2	$ 6	$ 8
Interest cost	8	5	22	15
Expected return on plan assets	(7)	(8)	(25)	(22)
Net amortization	(1)	0	(2)	(1)
Net periodic benefit cost (credit)	3	(1)	1	0
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	7	12	20
Interest cost	27	20	82	58
Expected return on plan assets	(30)	(28)	(92)	(82)
Settlement	0	0	(5)	2
Net amortization	4	4	11	13
Net periodic benefit cost (credit)	4	3	8	11
United Kingdom | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	5	10
Interest cost	14	8	42	27
Expected return on plan assets	(20)	(22)	(60)	(70)
Net amortization	7	6	20	18
Net periodic benefit cost (credit)	$ 3	$ (5)	$ 7	$ (15)