Schedule I Condensed Financial Statements (Parent Company Only) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 8,442	$ 7,132	$ 9,359
Cash flows from investing activities:
Purchases of marketable securities	(354)	(314)	(574)
Proceeds from sales of marketable securities	2,615	2,520	2,464
Other, net	44	21	(22)
Net cash flows from investing activities	(6,035)	(5,899)	(7,750)
Cash flows from financing activities:
Preferred stock redemptions	0	(850)	(800)
Preferred dividends	0	(38)	(50)
Common stock repurchases	(2,276)	0	(870)
Repayments of BHE junior subordinated debt	(91)	0	0
Net proceeds from (repayments of) short-term debt	(3,017)	3,024	(867)
Other, net	(37)	(54)	(274)
Net cash flows from financing activities	(2,620)	(1,250)	(1,006)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(225)	(6)	573
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,811	1,817	1,244
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,586	1,811	1,817
MidAmerican Funding LLC
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(11)	(12)	(12)
Cash flows from investing activities:
Proceeds from dividends received	425	1,025	69
Net cash flows from investing activities	425	1,025	69
Cash flows from financing activities:
Distributions	(425)	(1,025)	(69)
Notes payable to affiliate, net	11	12	12
Net cash flows from financing activities	(414)	(1,013)	(57)
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	5,375	5,824	1,252
Cash flows from investing activities:
Investments in subsidiaries	(1,053)	(4,995)	(1,085)
Purchases of marketable securities	(10)	(39)	(20)
Proceeds from sales of marketable securities	13	35	11
Proceeds from other investments	0	0	0
Notes receivable from affiliate, net	6	(571)	390
Other, net	4	(18)	(44)
Net cash flows from investing activities	(1,040)	(5,588)	(748)
Cash flows from financing activities:
Preferred stock redemptions	0	(850)	(800)
Preferred dividends	0	(38)	(50)
Common stock repurchases	(2,276)	0	(870)
Proceeds from BHE senior debt	0	0	986
Repayments of BHE senior debt	0	(900)	0
Repayments of BHE junior subordinated debt	(91)	0	0
Net proceeds from (repayments of) short-term debt	(1,755)	1,690	245
Notes payable to affiliate, net	300	0	0
Repayment of note payable	(600)	0	0
Other, net	(1)	(4)	(1)
Net cash flows from financing activities	(4,423)	(102)	(490)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(88)	134	14
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	166	32	18
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 78	$ 166	$ 32