Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 2,968	$ 2,591	$ 2,910
Net income (loss) attributable to parent	2,950	2,568	2,870
Adjustments to reconcile net income to net cash flows from operating activities:
Gain (Loss) on Investments	288	538	(14)
Other Nonrecurring (Income) Expense	43	56	455
Depreciation and amortization	3,011	2,984	2,646
Allowance for equity funds	(173)	(104)	(76)
Changes in regulatory assets and liabilities	153	196	31
Deferred income taxes and amortization of investment tax credits	290	8	19
Equity (income) loss, net of distributions	44	(43)	151
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	93	45	260
Other, net	23	67	12
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(372)	72	(74)
Derivative collateral, net	(25)	27	(22)
Pension and other postretirement benefit plans	(51)	(54)	(91)
Accrued property, income and other taxes	(16)	199	(28)
Accounts payable and other liabilities	(26)	145	50
Net cash flows from operating activities	6,206	6,770	6,078
Cash flows from investing activities:
Capital expenditures	(7,364)	(6,241)	(4,571)
Acquisitions, net of cash acquired	(27)	(106)	(1,113)
Purchases of marketable securities	(262)	(329)	(190)
Proceeds from sales of marketable securities	238	287	202
Equity method investments	(1,617)	(683)	(395)
Other, net	69	83	(12)
Net cash flows from investing activities	(8,963)	(6,989)	(6,079)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166	0
Repayments of BHE senior debt and junior subordinated debentures	0	(1,045)	(2,323)
Payments for Repurchase of Common Stock	(293)	(107)	(19)
Proceeds from subsidiary debt	4,699	2,352	1,763
Repayments of subsidiary debt	(1,914)	(2,422)	(1,000)
Net proceeds from (repayments of) short-term debt	684	(1,946)	2,361
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(435)
Business acquisition, acquisition of remaining noncontrolling interest	0	(131)	0
Other, net	(52)	(41)	(73)
Net cash flows from financing activities	3,124	(174)	274
Effect of exchange rate changes	18	(7)	7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	385	(400)	280
Cash and cash equivalents and restricted cash and cash equivalents at end of period	883	1,283	1,003
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,268	883	1,283
Parent Company [Member]
Cash flows from operating activities:
Net income	2,954	2,571	2,873
Net income (loss) attributable to parent	2,951	2,568	2,870
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	5	4	4
Equity (income) loss, net of distributions	(3,419)	(3,058)	(3,441)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Net cash flows from operating activities	1,780	1,885	2,450
Cash flows from investing activities:
Investments in subsidiaries	1,972	1,791	1,566
Purchases of marketable securities	(42)	(44)	(71)
Proceeds from sales of marketable securities	42	45	68
Repayment of (Issuance of) Notes Receivable with Related Parties, Net	(112)	(72)	(305)
Other, net	(5)	(22)	(8)
Net cash flows from investing activities	(2,089)	(1,884)	(1,882)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166	0
Payments for Repurchase of Common Stock	(293)	(107)	(19)
Net proceeds from (repayments of) short-term debt	607	(2,348)	2,498
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(406)
Other, net	(1)	(4)	(5)
Net cash flows from financing activities	313	(338)	(255)
Net change in cash and cash equivalents and restricted cash and cash equivalents	4	(337)	313
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	793	682	605
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Allowance for equity funds	(78)	(53)	(41)
Amortization of Utility Plant to Other Operating Expense	33	34	34
Deferred income taxes and amortization of investment tax credits	154	33	332
Other, net	(9)	13	(15)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	60	(25)	(60)
Inventories	(22)	41	19
Derivative collateral, net	(1)	(1)	2
Pension and other postretirement benefit plans	(10)	(13)	(11)
Accrued property, income and other taxes	(76)	218	(41)
Accounts payable and other liabilities	7	(30)	72
Net cash flows from operating activities	1,490	1,508	1,396
Cash flows from investing activities:
Capital expenditures	(2,810)	(2,332)	(1,773)
Purchases of marketable securities	(156)	(263)	(143)
Proceeds from sales of marketable securities	138	223	137
Proceeds from Sales of Business, Affiliate and Productive Assets	1	17	2
Other investment proceeds	13	15	1
Other, net	13	30	0
Net cash flows from investing activities	(2,801)	(2,310)	(1,776)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	2,326	687	990
Net proceeds from (repayments of) short-term debt	(240)	240	(99)
Repayments of Long-term Debt	(500)	(350)	(255)
Other, net	(1)	(1)	0
Net cash flows from financing activities	1,585	576	636
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	274	(226)	256
Cash and cash equivalents and restricted cash and cash equivalents at end of period	56	282	26
Cash and cash equivalents and restricted cash and cash equivalents at end of period	330	56	282
PacifiCorp [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	771	738	768
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	954	979	796
Allowance for equity funds	(72)	(35)	(20)
Changes in regulatory assets and liabilities	(55)	87	18
Deferred income taxes and amortization of investment tax credits	(131)	(199)	70
Other, net	20	5	9
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	14	62	67
Inventories	23	16	10
Derivative collateral, net	12	15	(6)
Accrued property, income and other taxes	22	60	(48)
Accounts payable and other liabilities	(11)	83	(62)
Net cash flows from operating activities	1,547	1,811	1,602
Cash flows from investing activities:
Capital expenditures	(2,175)	(1,257)	(769)
Other, net	11	5	12
Net cash flows from investing activities	(2,164)	(1,252)	(757)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	989	593	0
Net proceeds from (repayments of) short-term debt	100	(50)	(190)
Repayments of Long-term Debt	(350)	(586)	(52)
Common stock dividends	(175)	(450)	(600)
Other, net	(3)	(3)	(7)
Net cash flows from financing activities	561	(496)	(849)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(56)	63	(4)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	92	29	33
Cash and cash equivalents and restricted cash and cash equivalents at end of period	36	92	29
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income (loss) attributable to parent	781	669	574
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	0	0	29
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Allowance for equity funds	(78)	(53)	(41)
Amortization of Utility Plant to Other Operating Expense	33	34	34
Deferred income taxes and amortization of investment tax credits	152	32	334
Other, net	(8)	16	(14)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	56	(19)	(62)
Inventories	(22)	41	19
Derivative collateral, net	(1)	(1)	2
Pension and other postretirement benefit plans	(10)	(13)	(11)
Accrued property, income and other taxes	(74)	230	(54)
Accounts payable and other liabilities	7	(29)	70
Net cash flows from operating activities	1,475	1,516	1,380
Cash flows from investing activities:
Capital expenditures	(2,810)	(2,332)	(1,773)
Purchases of marketable securities	(156)	(263)	(143)
Proceeds from sales of marketable securities	138	223	137
Proceeds from Sales of Business, Affiliate and Productive Assets	1	17	2
Other investment proceeds	13	15	1
Other, net	13	30	(3)
Net cash flows from investing activities	(2,801)	(2,310)	(1,779)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	2,326	687	990
Net proceeds from (repayments of) short-term debt	(240)	240	(99)
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(29)
Repayments of Long-term Debt	(500)	(350)	(341)
Increase (Decrease) in Notes Payable, Related Parties, Current	15	(8)	133
Other, net	(1)	0	0
Net cash flows from financing activities	1,600	569	654
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	274	(225)	255
Cash and cash equivalents and restricted cash and cash equivalents at end of period	57	282	27
Cash and cash equivalents and restricted cash and cash equivalents at end of period	331	57	282
Nevada Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	264	226	255
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	1	0	(1)
Utilities Operating Expense, Depreciation and Amortization	357	337	308
Allowance for equity funds	(5)	(3)	(1)
Changes in regulatory assets and liabilities	27	83	50
Deferred income taxes and amortization of investment tax credits	(32)	(13)	94
Deferred Energy Change	51	(11)	(16)
Amortization of deferred energy	43	16	16
Other, net	(6)	14	(3)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	19	5	6
Inventories	1	(1)	6
Accrued property, income and other taxes	(13)	(35)	(26)
Accounts payable and other liabilities	(6)	1	(23)
Net cash flows from operating activities	701	619	665
Cash flows from investing activities:
Capital expenditures	(409)	(298)	(270)
Acquisitions	0	0	(77)
Proceeds from sale of assets	2	1	4
Net cash flows from investing activities	(407)	(297)	(343)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	495	573	91
Repayments of Long-term Debt	(500)	(824)	(75)
Common stock dividends	(371)	0	(548)
Other, net	14	16	14
Net cash flows from financing activities	(390)	(267)	(546)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(96)	55	(224)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	121	66	290
Cash and cash equivalents and restricted cash and cash equivalents at end of period	25	121	66
Sierra Pacific Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	103	92	109
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	1	0	0
Utilities Operating Expense, Depreciation and Amortization	125	119	114
Allowance for equity funds	(3)	(4)	(4)
Changes in regulatory assets and liabilities	25	42	17
Deferred income taxes and amortization of investment tax credits	9	7	55
Deferred Energy Change	15	9	(20)
Amortization of deferred energy	(2)	(10)	(47)
Other, net	(1)	0	(4)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(6)	3	4
Inventories	(5)	(4)	(3)
Accrued property, income and other taxes	(16)	3	1
Accounts payable and other liabilities	(8)	18	(41)
Net cash flows from operating activities	237	275	181
Cash flows from investing activities:
Capital expenditures	(248)	(205)	(186)
Proceeds from sale of assets	1	0	0
Net cash flows from investing activities	(247)	(205)	(186)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	125	0	0
Repayments of Long-term Debt	(109)	0	0
Common stock dividends	(46)	0	(45)
Other, net	(4)	(2)	(2)
Net cash flows from financing activities	(34)	(2)	(47)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(44)	68	(52)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	76	8	60
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 32	$ 76	$ 8