Schedule I Condensed Financial Statements (Parent Company Only) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 7,132	$ 9,359	$ 8,692
Cash flows from investing activities:
Purchases of marketable securities	(314)	(574)	(297)
Proceeds from sales of marketable securities	2,520	2,464	273
Other, net	17	(28)	(94)
Net cash flows from investing activities	(5,899)	(7,750)	(5,763)
Cash flows from financing activities:
Preferred stock redemptions	(850)	(800)	(2,100)
Preferred dividends	(38)	(50)	(132)
Common stock purchases	0	(870)	0
Net proceeds from (repayments of) short-term debt	3,024	(867)	(276)
Other, net	(54)	(274)	(70)
Net cash flows from financing activities	(1,250)	(1,006)	(3,131)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(6)	573	(201)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,817	1,244	1,445
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,811	1,817	1,244
MidAmerican Funding LLC
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(12)	(12)	(12)
Cash flows from investing activities:
Proceeds from dividends received	1,025	69	0
Net cash flows from investing activities	1,025	69	0
Cash flows from financing activities:
Distributions	(1,025)	(69)	0
Notes payable to affiliate, net	12	12	12
Net cash flows from financing activities	(1,013)	(57)	12
Net change in cash and cash equivalents and restricted cash and cash equivalents	0	0	0
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents and restricted cash and cash equivalents at end of period	0	0	0
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	5,824	1,252	1,819
Cash flows from investing activities:
Investments in subsidiaries	(4,995)	(1,085)	(1,206)
Purchases of marketable securities	(39)	(20)	(29)
Proceeds from sales of marketable securities	35	11	28
Proceeds from other investments	0	0	1,290
Notes receivable from affiliate, net	(571)	390	200
Other, net	(18)	(44)	(20)
Net cash flows from investing activities	(5,588)	(748)	263
Cash flows from financing activities:
Preferred stock redemptions	(850)	(800)	(2,100)
Preferred dividends	(38)	(50)	(132)
Common stock purchases	0	(870)	0
Proceeds from BHE senior debt	0	986	0
Repayments of BHE senior debt	(900)	0	(450)
Net proceeds from (repayments of) short-term debt	1,690	245	0
Other, net	(4)	(1)	(5)
Net cash flows from financing activities	(102)	(490)	(2,687)
Net change in cash and cash equivalents and restricted cash and cash equivalents	134	14	(605)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	32	18	623
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 166	$ 32	$ 18