Segment Information - MidAmerican Funding (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) operatingSegment reportableSegment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | operatingSegment	8
Revenues	$ 26,337	$ 25,150	$ 20,952
Operating income (loss)	5,241	5,327	4,291
Interest expense	2,216	2,118	2,021
Income tax (benefit) expense	(1,916)	(1,132)	308
Net income (loss) attributable to parent	2,721	5,790	6,943
Capitalized expenditures	7,505	6,611	6,765
Assets	133,840	132,065	127,316
Goodwill	$ 11,489	11,650	11,506
MidAmerican Funding, LLC
Segment Reporting Information [Line Items]
Number of reportable segments | reportableSegment	2
Revenues	$ 4,025	3,547	2,728
Depreciation and amortization	1,168	914	716
Operating income (loss)	438	416	454
Interest expense	333	319	322
Income tax (benefit) expense	(776)	(680)	(574)
Net income (loss) attributable to parent	947	883	818
Capitalized expenditures	1,869	1,912	1,836
Assets	25,254	24,531	22,711
Goodwill	1,270	1,270
MidAmerican Funding, LLC | Other
Segment Reporting Information [Line Items]
Revenues	7	15	16
Operating income (loss)	0	0	6
Interest expense	20	17	18
Income tax (benefit) expense	(6)	(6)	(4)
Net income (loss) attributable to parent	(14)	(11)	(7)
Assets	8	5	5
MidAmerican Funding, LLC | Regulated electric | Operating segments
Segment Reporting Information [Line Items]
Revenues	2,988	2,529	2,139
Depreciation and amortization	1,112	861	667
Operating income (loss)	372	358	384
Interest expense	290	279	281
Income tax (benefit) expense	(779)	(677)	(584)
Net income (loss) attributable to parent	931	844	780
Capitalized expenditures	1,742	1,806	1,704
Assets	23,283	22,576	21,083
Goodwill	1,191	1,191
MidAmerican Funding, LLC | Regulated natural gas | Operating segments
Segment Reporting Information [Line Items]
Revenues	1,030	1,003	573
Depreciation and amortization	56	53	49
Operating income (loss)	66	58	64
Interest expense	23	23	23
Income tax (benefit) expense	9	3	14
Net income (loss) attributable to parent	30	50	45
Capitalized expenditures	127	106	132
Assets	1,963	1,950	$ 1,623
Goodwill	$ 79	$ 79