Schedule I Condensed Financial Statements (Parent Company Only) - Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating costs and expenses:
Depreciation and amortization	$ 4,286	$ 3,881	$ 3,455
Total operating expenses	21,096	19,823	16,661
Operating income	5,241	5,327	4,291
Other income (expense):
Interest expense	(2,216)	(2,118)	(2,021)
Other, net	(7)	(17)	88
Total other income (expense)	(3,828)	(33)	3,180
Income (loss) before income tax expense (benefit) and equity income (loss)	1,413	5,294	7,471
Income tax (benefit) expense	(1,916)	(1,132)	308
Equity income (loss)	(185)	(237)	(149)
Net income	3,144	6,189	7,014
Net income attributable to noncontrolling interests	423	399	71
Net income (loss) attributable to parent	2,721	5,790	6,943
Preferred dividends	46	121	26
Earnings on common shares	2,675	5,669	6,917
MidAmerican Funding LLC
Other income (expense):
Interest expense	(17)	(16)	(16)
Income (loss) before income tax expense (benefit) and equity income (loss)	(17)	(16)	(16)
Income tax (benefit) expense	(5)	(5)	(5)
Equity income (loss)	959	894	829
Net income (loss) attributable to parent	947	883	818
Parent Company
Operating costs and expenses:
General and administration	31	83	57
Depreciation and amortization	8	6	4
Total operating expenses	39	89	61
Operating income	(39)	(89)	(61)
Other income (expense):
Interest expense	(629)	(580)	(527)
Other, net	(45)	1,846	4,789
Total other income (expense)	(674)	1,266	4,262
Income (loss) before income tax expense (benefit) and equity income (loss)	(713)	1,177	4,201
Income tax (benefit) expense	(259)	194	1,089
Equity income (loss)	3,175	4,807	3,832
Net income	2,721	5,790	6,944
Net income attributable to noncontrolling interests	0	0	1
Net income (loss) attributable to parent	2,721	5,790	6,943
Preferred dividends	46	121	26
Earnings on common shares	$ 2,675	$ 5,669	$ 6,917