Employee Benefit Plans - EEGH (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
EEGH
Defined Benefit Plan Disclosure [Line Items]
Pension plan liability, noncurrent	$ 51		$ 51
Pension Plan | EEGH | MidAmerican Energy Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	4	$ 6
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	3
Other Postretirement Plans | EEGH | MidAmerican Energy Retiree Health and Welfare Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 1	$ 1