Schedule I Condensed Financial Statements (Parent Company Only) - Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating costs and expenses:
Depreciation and amortization	$ 3,881	$ 3,455	$ 3,011
Total operating expenses	19,823	16,661	15,694
Operating income	5,327	4,291	4,150
Other income (expense):
Interest expense	(2,118)	(2,021)	(1,912)
Other, net	(17)	88	97
Total other income (expense)	(33)	3,180	(1,736)
Income (loss) before income tax expense (benefit) and equity income (loss)	5,294	7,471	2,414
Income tax (benefit) expense	(1,132)	308	(598)
Equity income (loss)	(237)	(149)	(44)
Net income	6,189	7,014	2,968
Net income attributable to noncontrolling interests	399	71	18
Net income (loss) attributable to parent	5,790	6,943	2,950
Preferred dividends	121	26	0
Earnings on common shares	5,669	6,917	2,950
MidAmerican Funding LLC
Other income (expense):
Interest expense	(16)	(16)	(16)
Income (loss) before income tax expense (benefit) and equity income (loss)	(16)	(16)	(16)
Income tax (benefit) expense	(5)	(5)	(5)
Equity income (loss)	894	829	792
Net income (loss) attributable to parent	883	818	781
Parent Company
Operating costs and expenses:
General and administration	83	57	49
Depreciation and amortization	6	4	5
Total operating expenses	89	61	54
Operating income	(89)	(61)	(54)
Other income (expense):
Interest expense	(580)	(527)	(452)
Other, net	1,846	4,789	(271)
Total other income (expense)	1,266	4,262	(723)
Income (loss) before income tax expense (benefit) and equity income (loss)	1,177	4,201	(777)
Income tax (benefit) expense	194	1,089	(312)
Equity income (loss)	4,807	3,832	3,419
Net income	5,790	6,944	2,954
Net income attributable to noncontrolling interests	0	1	3
Net income (loss) attributable to parent	5,790	6,943	2,951
Preferred dividends	121	26	0
Earnings on common shares	$ 5,669	$ 6,917	$ 2,951