Employee Benefit Plans - EGTS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 1
EGTS
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan liability, noncurrent	47		$ 47
EGTS | MidAmerican Energy Company Retirement Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	2	$ 3
EGTS | MidAmerican Energy Retiree Health and Welfare Plan | Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 1	$ 1