Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 7,014	$ 2,968	$ 2,591
Net income (loss) attributable to parent	6,943	2,950	2,568
Adjustments to reconcile net income to net cash flows from operating activities:
Gain (Loss) on Investments	(4,797)	288	538
Other Nonrecurring (Income) Expense	54	43	56
Depreciation and amortization	3,455	3,011	2,984
Allowance for equity funds	(165)	(173)	(104)
Changes in regulatory assets and liabilities	(415)	153	196
Deferred income taxes and amortization of investment tax credits	1,880	290	8
Equity (income) loss, net of distributions	149	44	(43)
Equity loss, net of distributions	248	93	45
Other, net	(77)	23	67
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(1,318)	(372)	72
Derivative collateral, net	43	(25)	27
Pension and other postretirement benefit plans	(65)	(51)	(54)
Accrued property, income and other taxes, net	(134)	(16)	199
Accounts payable and other liabilities	501	(26)	145
Net cash flows from operating activities	6,224	6,206	6,770
Cash flows from investing activities:
Capital expenditures	(6,765)	(7,364)	(6,241)
Acquisitions, net of cash acquired	(2,397)	(27)	(106)
Purchases of marketable securities	(370)	(262)	(329)
Proceeds from sales of marketable securities	325	238	287
Equity method investments	(2,724)	(1,617)	(683)
Other, net	(1,234)	69	83
Net cash flows from investing activities	(13,165)	(8,963)	(6,989)
Cash flows from financing activities:
Proceeds from BHE senior debt	5,212	0	3,166
Repayments of BHE senior debt	(350)	0	(1,045)
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Payments for Repurchase of Common Stock	(126)	(293)	(107)
Proceeds from subsidiary debt	2,688	4,699	2,352
Repayments of subsidiary debt	(2,841)	(1,914)	(2,422)
Net (repayments of) proceeds from short-term debt	(939)	684	(1,946)
Business acquisition, acquisition of remaining noncontrolling interest	(33)	0	(131)
Other, net	(258)	(52)	(41)
Net cash flows from financing activities	7,103	3,124	(174)
Effect of exchange rate changes	15	18	(7)
Net change in cash and cash equivalents and restricted cash	177	385	(400)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,268	883	1,283
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,445	1,268	883
Parent Company [Member]
Cash flows from operating activities:
Net income	6,944	2,954	2,571
Net income (loss) attributable to parent	6,943	2,951	2,568
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	4	5	4
Equity (income) loss, net of distributions	(3,832)	(3,419)	(3,058)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Net cash flows from operating activities	1,639	1,780	1,885
Cash flows from investing activities:
Investments in subsidiaries	6,422	1,972	1,791
Purchases of marketable securities	(1,345)	(42)	(44)
Proceeds from sales of marketable securities	22	42	45
Repayment of (Issuance of) Notes Receivable with Related Parties, Net	(121)	(112)	(72)
Other, net	(20)	(5)	(22)
Net cash flows from investing activities	(7,886)	(2,089)	(1,884)
Cash flows from financing activities:
Proceeds from BHE senior debt	5,212	0	3,166
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Payments for Repurchase of Common Stock	(126)	(293)	(107)
Net (repayments of) proceeds from short-term debt	(1,590)	607	(2,348)
Other, net	(39)	(1)	(4)
Net cash flows from financing activities	6,857	313	(338)
Net change in cash and cash equivalents and restricted cash	610	4	(337)
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	826	793	682
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	716	639	609
Allowance for equity funds	(45)	(78)	(53)
Amortization of Utility Plant to Other Operating Expense	34	33	34
Deferred income taxes and amortization of investment tax credits	208	154	33
Asset Retirement Obligation, Cash Paid to Settle	(124)	(14)	(28)
Other, net	(18)	4	40
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	48	60	(25)
Inventories	(52)	(22)	41
Pension and other postretirement benefit plans	(19)	(10)	(13)
Accrued property, income and other taxes, net	(64)	(76)	218
Accounts payable and other liabilities	33	7	(30)
Net cash flows from operating activities	1,543	1,490	1,508
Cash flows from investing activities:
Capital expenditures	(1,836)	(2,810)	(2,332)
Purchases of marketable securities	(281)	(156)	(263)
Proceeds from sales of marketable securities	269	138	223
Proceeds from Sales of Business, Affiliate and Productive Assets	2	1	17
Other investment proceeds	9	13	15
Other, net	11	13	30
Net cash flows from investing activities	(1,826)	(2,801)	(2,310)
Cash flows from financing activities:
Proceeds from long-term debt	0	2,326	687
Net (repayments of) proceeds from short-term debt	0	(240)	240
Repayments of Long-term Debt	0	(500)	(350)
Other, net	(2)	(1)	(1)
Net cash flows from financing activities	(2)	1,585	576
Net change in cash and cash equivalents and restricted cash	(285)	274	(226)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	330	56	282
Cash and cash equivalents and restricted cash and cash equivalents at end of period	45	330	56
PacifiCorp [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	739	771	738
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	1,209	954	979
Allowance for equity funds	(98)	(72)	(35)
Changes in regulatory assets and liabilities	(229)	(55)	87
Deferred income taxes and amortization of investment tax credits	(124)	(131)	(199)
Other, net	1	20	5
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(154)	26	31
Inventories	(88)	23	16
Increase (Decrease) in Prepaid Expense	(15)	(12)	31
Derivative collateral, net	23	12	15
Accrued property, income and other taxes, net	(53)	22	60
Accounts payable and other liabilities	372	(11)	83
Net cash flows from operating activities	1,583	1,547	1,811
Cash flows from investing activities:
Capital expenditures	(2,540)	(2,175)	(1,257)
Other, net	30	11	5
Net cash flows from investing activities	(2,510)	(2,164)	(1,252)
Cash flows from financing activities:
Proceeds from long-term debt	987	989	593
Net (repayments of) proceeds from short-term debt	(37)	100	(50)
Repayments of Long-term Debt	(38)	(350)	(586)
Common stock dividends	0	(175)	(450)
Other, net	(2)	(3)	(3)
Net cash flows from financing activities	910	561	(496)
Net change in cash and cash equivalents and restricted cash	(17)	(56)	63
Cash and cash equivalents and restricted cash and cash equivalents at end of period	36	92	29
Cash and cash equivalents and restricted cash and cash equivalents at end of period	19	36	92
MidAmerican Funding, LLC and Subsidiaries [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	818	781	669
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	716	639	609
Allowance for equity funds	(45)	(78)	(53)
Amortization of Utility Plant to Other Operating Expense	34	33	34
Deferred income taxes and amortization of investment tax credits	211	152	32
Asset Retirement Obligation, Cash Paid to Settle	(124)	(14)	(28)
Other, net	(17)	5	43
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	48	56	(19)
Inventories	(52)	(22)	41
Pension and other postretirement benefit plans	(19)	(10)	(13)
Accrued property, income and other taxes, net	(66)	(74)	230
Accounts payable and other liabilities	32	7	(29)
Net cash flows from operating activities	1,536	1,475	1,516
Cash flows from investing activities:
Capital expenditures	(1,836)	(2,810)	(2,332)
Purchases of marketable securities	(281)	(156)	(263)
Proceeds from sales of marketable securities	269	138	223
Proceeds from Sales of Business, Affiliate and Productive Assets	3	1	17
Other investment proceeds	9	13	15
Other, net	11	13	30
Net cash flows from investing activities	(1,825)	(2,801)	(2,310)
Cash flows from financing activities:
Proceeds from long-term debt	0	2,326	687
Net (repayments of) proceeds from short-term debt	0	(240)	240
Repayments of Long-term Debt	0	(500)	(350)
Increase (Decrease) in Notes Payable, Related Parties, Current	5	15	(8)
Other, net	(1)	(1)	0
Net cash flows from financing activities	4	1,600	569
Net change in cash and cash equivalents and restricted cash	(285)	274	(225)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	331	57	282
Cash and cash equivalents and restricted cash and cash equivalents at end of period	46	331	57
Nevada Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	295	264	226
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	361	357	337
Allowance for equity funds	(7)	(5)	(3)
Changes in regulatory assets and liabilities	(42)	27	83
Deferred income taxes and amortization of investment tax credits	(10)	(32)	(13)
Deferred Energy Change	(44)	51	(11)
Amortization of deferred energy	(41)	43	16
Other, net	2	(5)	14
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	45	19	5
Inventories	(7)	1	(1)
Accrued property, income and other taxes, net	5	(13)	(35)
Accounts payable and other liabilities	(90)	(6)	1
Net cash flows from operating activities	467	701	619
Cash flows from investing activities:
Capital expenditures	(455)	(409)	(298)
Proceeds from sale of assets	26	2	1
Net cash flows from investing activities	(429)	(407)	(297)
Cash flows from financing activities:
Proceeds from long-term debt	718	495	573
Repayments of Long-term Debt	(575)	(500)	(824)
Common stock dividends	(155)	(371)	0
Other, net	15	14	16
Net cash flows from financing activities	(27)	(390)	(267)
Net change in cash and cash equivalents and restricted cash	11	(96)	55
Cash and cash equivalents and restricted cash and cash equivalents at end of period	25	121	66
Cash and cash equivalents and restricted cash and cash equivalents at end of period	36	25	121
Sierra Pacific Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	111	103	92
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	141	125	119
Allowance for equity funds	(4)	(3)	(4)
Changes in regulatory assets and liabilities	(33)	25	42
Deferred income taxes and amortization of investment tax credits	12	9	7
Deferred Energy Change	(17)	15	9
Amortization of deferred energy	(14)	(2)	(10)
Other, net	(2)	0	0
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(81)	(6)	3
Inventories	(19)	(5)	(4)
Accrued property, income and other taxes, net	9	(16)	3
Accounts payable and other liabilities	87	(8)	18
Net cash flows from operating activities	190	237	275
Cash flows from investing activities:
Capital expenditures	(246)	(248)	(205)
Other, net	0	1	0
Net cash flows from investing activities	(246)	(247)	(205)
Cash flows from financing activities:
Proceeds from long-term debt	30	125	0
Repayments of Long-term Debt	0	(109)	0
Proceeds from Short-term Debt	45	0	0
Common stock dividends	(20)	(46)	0
Other, net	(5)	(4)	(2)
Net cash flows from financing activities	50	(34)	(2)
Net change in cash and cash equivalents and restricted cash	(6)	(44)	68
Cash and cash equivalents and restricted cash and cash equivalents at end of period	32	76	8
Cash and cash equivalents and restricted cash and cash equivalents at end of period	26	32	76
Eastern Energy Gas Holdings, LLC [Member]
Cash flows from operating activities:
Net income	273	842	656
Net income (loss) attributable to parent	109	721	481
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	531	21	273
Depreciation and amortization	366	445	424
Depreciation and amortization	366	367	333
Allowance for equity funds	(13)	(18)	(15)
Changes in regulatory assets and liabilities	(37)	(74)	(64)
Deferred income taxes and amortization of investment tax credits	(5)	(3)	380
Equity (income) loss, net of distributions	(42)	(43)	(54)
Equity loss, net of distributions	35	31	9
Other, net	23	61	30
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	346	115	(393)
Derivative collateral, net	(140)	7	4
Pension and other postretirement benefit plans	(88)	(139)	(153)
Accrued property, income and other taxes, net	23	(53)	18
Accounts payable and other liabilities	(40)	(173)	22
Net cash flows from operating activities	1,274	1,062	1,191
Cash flows from investing activities:
Capital expenditures	(374)	(704)	(1,109)
Loans to affiliates	0	(1,872)	(2,986)
Repayment of loans by affiliates	3,422	3,748	0
Other, net	16	(22)	89
Net cash flows from investing activities	3,064	1,150	(4,006)
Cash flows from financing activities:
Proceeds from long-term debt	0	1,895	3,750
Net (repayments of) proceeds from short-term debt	(62)	52	(619)
(Repayment) issuance of affiliated current borrowings, net	(251)	(2,837)	291
Proceeds from (Repayments of) Lines of Credit	0	(73)	73
Proceeds from Noncontrolling Interests	1,223	3,385	25
Distributions	(4,539)	(636)	(296)
Repayments of Long-term Debt	(700)	(4,141)	(251)
Other, net	0	(16)	(17)
Net cash flows from financing activities	(4,329)	(2,371)	2,956
Net change in cash and cash equivalents and restricted cash	9	(159)	141
Cash and cash equivalents and restricted cash and cash equivalents at end of period	39	198	57
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 48	$ 39	$ 198