Employee Benefit Plans - MidAmerican Funding - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension | MidAmerican Funding, LLC
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	$ 8	$ 21	$ 7
Other Postretirement
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	1	6	(10)
Other Postretirement | MidAmerican Funding, LLC
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	$ 1	$ 2	$ (3)