Employee Benefit Plans - EGTS (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 3
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	4	$ 5
EGTS | MidAmerican Energy Retiree Health and Welfare Plan | Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 1	$ 1