Employee Benefit Plans - MidAmerican Funding - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension | MidAmerican Funding, LLC
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	$ 14	$ 8	$ 21
Other Postretirement
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	3	1	6
Other Postretirement | MidAmerican Funding, LLC
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	$ 2	$ 1	$ 2