Segment Information - MidAmerican Funding (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) operatingSegment reportableSegment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | operatingSegment	8
Revenues	$ 25,920	$ 25,602	$ 26,337
Cost of sales	6,616	7,057	6,757
Operating income	4,346	2,780	5,241
Interest expense	(2,716)	(2,415)	(2,216)
Interest and dividend income	443	412	154
Income tax expense (benefit)	(1,582)	(1,699)	(1,916)
Other segment items	114	(33)	(3,019)
Net income attributable to parent	4,300	3,020	2,721
Capital expenditures	9,013	9,148	7,505
Total assets	140,140	137,840	133,840
Goodwill	$ 11,413	11,547	11,489
MidAmerican Funding, LLC
Segment Reporting Information [Line Items]
Number of reportable segments | reportableSegment	2
Revenues	$ 3,251	3,393	4,025
Cost of sales	797	952	1,442
Operations and maintenance	879	851	828
Depreciation and amortization	1,001	908	1,168
Property and other taxes	166	161	149
Operating income	408	521	438
Interest expense	(434)	(362)	(333)
Interest and dividend income	40	24	7
Income tax expense (benefit)	(843)	(695)	(776)
Other segment items	134	102	59
Net income attributable to parent	991	980	947
Capital expenditures	1,704	1,833	1,869
Total assets	27,390	26,509	25,254
Goodwill	1,270	1,270	1,270
MidAmerican Funding, LLC | Other
Segment Reporting Information [Line Items]
Revenues	9	7	7
Cost of sales	0	0	1
Operations and maintenance	1	2	1
Depreciation and amortization	0	0	0
Property and other taxes	0	0	0
Operating income	8	5	5
Interest expense	(17)	(16)	(20)
Interest and dividend income	0	0	0
Income tax expense (benefit)	(1)	(5)	(6)
Other segment items	(2)	7	(5)
Net income attributable to parent	(10)	1	(14)
Capital expenditures	10	1	0
Total assets	5	5	8
Goodwill	0	0	0
MidAmerican Funding, LLC | Electric | Operating segments
Segment Reporting Information [Line Items]
Revenues	2,584	2,673	2,988
Cost of sales	430	501	679
Operations and maintenance	757	711	692
Depreciation and amortization	935	846	1,112
Property and other taxes	152	144	133
Operating income	310	471	372
Interest expense	(387)	(320)	(290)
Interest and dividend income	37	22	6
Income tax expense (benefit)	(841)	(676)	(779)
Other segment items	129	80	64
Net income attributable to parent	930	929	931
Capital expenditures	1,580	1,683	1,742
Total assets	25,350	24,525	23,283
Goodwill	1,191	1,191	1,191
MidAmerican Funding, LLC | Natural Gas | Operating segments
Segment Reporting Information [Line Items]
Revenues	658	713	1,030
Cost of sales	367	451	762
Operations and maintenance	121	138	135
Depreciation and amortization	66	62	56
Property and other taxes	14	17	16
Operating income	90	45	61
Interest expense	(30)	(26)	(23)
Interest and dividend income	3	2	1
Income tax expense (benefit)	(1)	(14)	9
Other segment items	7	15	0
Net income attributable to parent	71	50	30
Capital expenditures	114	149	127
Total assets	2,035	1,979	1,963
Goodwill	$ 79	$ 79	$ 79