Employee Benefit Plans - BHE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 2	$ 8	$ 8
Interest cost	5	4	15	14
Expected return on plan assets	(8)	(5)	(22)	(16)
Net amortization	0	0	(1)	(2)
Net periodic benefit (credit) cost	(1)	1	0	4
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	7	20	22
Interest cost	20	21	58	59
Expected return on plan assets	(28)	(32)	(82)	(101)
Settlement	0	4	2	4
Net amortization	4	6	13	19
Net periodic benefit (credit) cost	3	6	11	3
United Kingdom | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	4	10	12
Interest cost	8	8	27	23
Expected return on plan assets	(22)	(28)	(70)	(84)
Net amortization	6	14	18	42
Net periodic benefit (credit) cost	$ (5)	$ (2)	$ (15)	$ (7)