Segment Information - MidAmerican Funding (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) operatingSegment reportableSegment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | operatingSegment	8
Revenues	$ 25,602	$ 26,337	$ 25,150
Operating income (loss)	2,780	5,241	5,327
Interest expense	2,415	2,216	2,118
Income tax (benefit) expense	(1,699)	(1,916)	(1,132)
Net income (loss) attributable to parent	3,020	2,721	5,790
Capital expenditures	9,148	7,505	6,611
Capitalized expenditures	9,148	7,505	6,611
Assets	137,840	133,840	132,065
Goodwill	$ 11,547	11,489	11,650
MidAmerican Funding, LLC
Segment Reporting Information [Line Items]
Number of reportable segments | reportableSegment	2
Revenues	$ 3,393	4,025	3,547
Depreciation and amortization	908	1,168	914
Operating income (loss)	521	438	416
Interest expense	362	333	319
Income tax (benefit) expense	(695)	(776)	(680)
Net income (loss) attributable to parent	980	947	883
Capital expenditures	1,833	1,869	1,912
Capitalized expenditures	1,833	1,869	1,912
Assets	26,509	25,254	24,531
Goodwill	1,270	1,270
MidAmerican Funding, LLC | Other
Segment Reporting Information [Line Items]
Revenues	7	7	15
Interest expense	16	20	17
Income tax (benefit) expense	(5)	(6)	(6)
Net income (loss) attributable to parent	1	(14)	(11)
Assets	5	8	5
MidAmerican Funding, LLC | Regulated electric | Operating segments
Segment Reporting Information [Line Items]
Revenues	2,673	2,988	2,529
Depreciation and amortization	846	1,112	861
Operating income (loss)	471	372	358
Interest expense	320	290	279
Income tax (benefit) expense	(676)	(779)	(677)
Net income (loss) attributable to parent	929	931	844
Capital expenditures	1,683	1,742	1,806
Assets	24,525	23,283	22,576
Goodwill	1,191	1,191
MidAmerican Funding, LLC | Regulated natural gas | Operating segments
Segment Reporting Information [Line Items]
Revenues	713	1,030	1,003
Depreciation and amortization	62	56	53
Operating income (loss)	50	66	58
Interest expense	26	23	23
Income tax (benefit) expense	(14)	9	3
Net income (loss) attributable to parent	50	30	50
Capital expenditures	149	127	106
Assets	1,979	1,963	1,950
Goodwill	79	79
MidAmerican Funding, LLC | Regulated natural gas | Other
Segment Reporting Information [Line Items]
Capital expenditures	$ 1	$ 0	$ 0