Employee Benefit Plans - EGTS (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 5
EGTS
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan liability, noncurrent	85	$ 85
EGTS | MidAmerican Energy Company Retirement Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	9
EGTS | MidAmerican Energy Company Welfare Benefit Plan | Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 2