Schedule I Condensed Financial Statements (Parent Company Only) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 9,359	$ 8,692	$ 6,224
Cash flows from investing activities:
Purchases of marketable securities	(574)	(297)	(370)
Proceeds from sales of marketable securities	2,464	273	325
Purchases of other investments	(1,958)	(20)	(1,323)
Proceeds from other investments	6	1,300	13
Other, net	12	(74)	76
Net cash flows from investing activities	(7,750)	(5,763)	(13,165)
Cash flows from financing activities:
Proceeds from issuance of preferred stock	0	0	3,750
Preferred stock redemptions	(800)	(2,100)	0
Preferred dividends	(50)	(132)	(7)
Common stock purchases	(870)	0	(126)
Net proceeds from (repayments of) short-term debt	(867)	(276)	(939)
Other, net	(274)	(70)	(162)
Net cash flows from financing activities	(1,006)	(3,131)	7,103
Net change in cash and cash equivalents and restricted cash and cash equivalents	573	(201)	177
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,244	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,817	1,244	1,445
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	69	0	0
Net cash flows from investing activities	69	0	0
Cash flows from financing activities:
Distributions	(69)	0	0
Notes payable to affiliate, net	12	12	12
Net cash flows from financing activities	(57)	12	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	1,252	1,819	1,639
Cash flows from investing activities:
Investments in subsidiaries	(1,085)	(1,206)	(6,422)
Purchases of marketable securities	(20)	(29)	(55)
Proceeds from sales of marketable securities	11	28	22
Purchases of other investments	0	0	(1,290)
Proceeds from other investments	0	1,290	0
Notes receivable from affiliate, net	390	200	(121)
Other, net	(44)	(20)	(20)
Net cash flows from investing activities	(748)	263	(7,886)
Cash flows from financing activities:
Proceeds from issuance of preferred stock	0	0	3,750
Preferred stock redemptions	(800)	(2,100)	0
Preferred dividends	(50)	(132)	(7)
Common stock purchases	(870)	0	(126)
Proceeds from BHE senior debt	986	0	5,212
Repayments of BHE senior debt	0	(450)	(350)
Net proceeds from (repayments of) short-term debt	245	0	(1,590)
Other, net	(1)	(5)	(32)
Net cash flows from financing activities	(490)	(2,687)	6,857
Net change in cash and cash equivalents and restricted cash and cash equivalents	14	(605)	610
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	18	623	13
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 32	$ 18	$ 623