Schedule I Condensed Financial Statements (Parent Company Only) - Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating costs and expenses:
Depreciation and amortization	$ 4,184	$ 4,220	$ 4,286
Total operating expenses	21,574	22,822	21,096
Operating income	4,346	2,780	5,241
Other income (expense):
Interest expense	(2,716)	(2,415)	(2,216)
Other, net	86	116	(7)
Total other income (expense)	(1,173)	(819)	(3,828)
Income before income tax expense (benefit) and equity income (loss)	3,173	1,961	1,413
Income tax (benefit) expense	(1,582)	(1,699)	(1,916)
Equity income (loss)	(318)	(288)	(185)
Net income attributable to parent	4,300	3,020	2,721
Preferred dividends	0	34	46
Earnings on common shares	4,300	2,986	2,675
MidAmerican Funding LLC
Other income (expense):
Interest expense	(17)	(17)	(17)
Income before income tax expense (benefit) and equity income (loss)	(17)	(17)	(17)
Income tax (benefit) expense	(5)	(5)	(5)
Equity income (loss)	1,003	992	959
Net income attributable to parent	991	980	947
Parent Company
Operating costs and expenses:
General and administration	79	77	31
Depreciation and amortization	7	7	8
Total operating expenses	86	84	39
Operating income	(86)	(84)	(39)
Other income (expense):
Interest expense	(669)	(702)	(629)
Other, net	57	49	(45)
Total other income (expense)	(612)	(653)	(674)
Income before income tax expense (benefit) and equity income (loss)	(698)	(737)	(713)
Income tax (benefit) expense	(229)	(233)	(259)
Equity income (loss)	4,769	3,524	3,175
Net income attributable to parent	4,300	3,020	2,721
Preferred dividends	0	34	46
Earnings on common shares	$ 4,300	$ 2,986	$ 2,675