Supplemental Cash Flow Disclosures - MidAmerican Funding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid, net of amounts capitalized	$ 2,071	$ 2,041	$ 1,855
Income taxes received, net	1,863	1,309	1,361
Accruals related to property, plant and equipment additions	1,049	834	801
MidAmerican Funding, LLC
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid, net of amounts capitalized	309	296	302
Income taxes received, net	845	751	715
Accruals related to property, plant and equipment additions	$ 168	$ 257	$ 227