Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 2,570	$ 2,400	$ 2,122
Net income (loss) attributable to parent	2,542	2,370	2,095
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	2,591	2,428	2,057
Allowance for equity funds	(158)	(91)	(98)
Equity (income) loss, net of distributions	(123)	(115)	(109)
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	(67)	(38)	(79)
Changes in regulatory assets and liabilities	(34)	356	(168)
Deferred income taxes and amortization of investment tax credits	1,090	1,265	2,335
Other, net	(80)	11	147
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(158)	(9)	(44)
Derivative collateral, net	32	(14)	(70)
Pension and other postretirement benefit plans	(79)	(11)	86
Accrued property, income and other taxes	377	877	(1,117)
Accounts payable and other liabilities	(28)	(194)	(25)
Net cash flows from operating activities	6,056	6,980	5,146
Cash flows from investing activities:
Capital expenditures	(5,090)	(5,875)	(6,555)
Acquisitions, net of cash acquired	(66)	(164)	(2,956)
(Increase) decrease in restricted cash and investments	(36)	(28)	173
Purchases of available-for-sale securities	(141)	(144)	(150)
Proceeds from sales of available-for-sale securities	191	142	118
Equity method investments	(570)	(202)	(37)
Other, net	(34)	41	(11)
Net cash flows from investing activities	(5,746)	(6,230)	(9,418)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	0	1,478
Proceeds from BHE junior subordinated debentures	0	0	1,500
Repayments of BHE senior debt and junior subordinated debentures	(2,000)	(850)	(550)
Payments for Repurchase of Common Stock	0	(36)	0
Proceeds from subsidiary debt	2,327	2,479	1,257
Repayments of subsidiary debt	(1,831)	(1,354)	(971)
Net proceeds from (repayments of) short-term debt	879	(421)	1,055
Other, net	(65)	(73)	(44)
Net cash flows from financing activities	(690)	(255)	3,725
Effect of exchange rate changes	(7)	(4)	(11)
Net change in cash and cash equivalents	(387)	491	(558)
Cash and cash equivalents at beginning of period	1,108	617	1,175
Cash and cash equivalents at end of period	721	1,108	617
Parent Company [Member]
Cash flows from operating activities:
Net income	2,545	2,373	2,097
Net income (loss) attributable to parent	2,542	2,370	2,095
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	4	3	3
Equity (income) loss, net of distributions	(2,805)	(2,646)	(2,402)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Net cash flows from operating activities	2,760	2,528	1,937
Cash flows from investing activities:
Investments in subsidiaries	1,080	1,506	4,937
Purchases of available-for-sale securities	(24)	(36)	(56)
Proceeds from sales of available-for-sale securities	20	47	35
Repayment of (Issuance of) Notes Receivable with Related Parties, Net	(307)	19	(55)
Other, net	(5)	(7)	(7)
Net cash flows from investing activities	(1,396)	(1,483)	(5,020)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	0	1,478
Proceeds from BHE junior subordinated debentures	0	0	1,500
Proceeds from issuance of BHE common stock	0	0	0
Payments for Repurchase of Common Stock	0	(36)	0
Net proceeds from (repayments of) short-term debt	581	(142)	395
Notes payable to affiliate, net	69	4	(30)
Other, net	(4)	(1)	1
Net cash flows from financing activities	(1,354)	(1,025)	2,794
Net change in cash and cash equivalents	10	20	(289)
Cash and cash equivalents at beginning of period	23	3	292
Cash and cash equivalents at end of period	33	23	3
Repayments of BHE senior debt	0	0	250
Repayments of BHE subordinated debt	2,000	850	300
PacifiCorp [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	763	695	698
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	770	757	726
Allowance for equity funds	(27)	(33)	(51)
Changes in regulatory assets and liabilities	122	63	(112)
Deferred income taxes and amortization of investment tax credits	139	172	297
Other, net	4	6	22
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(25)	5	5
Derivative collateral, net	6	(47)	(16)
Increase (Decrease) in Inventories	(21)	(7)	37
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable	0	116	(155)
Accounts payable and other liabilities	(163)	7	119
Net cash flows from operating activities	1,568	1,734	1,570
Cash flows from investing activities:
Capital expenditures	(903)	(916)	(1,066)
Other, net	34	(2)	(13)
Net cash flows from investing activities	(869)	(918)	(1,079)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	0	248	422
Net proceeds from (repayments of) short-term debt	250	0	20
Repayments of long-term debt and capital lease obligations (PacifiCorp)	(68)	(124)	(238)
Common stock dividends	(875)	(950)	(725)
Other, net	(1)	(1)	0
Net cash flows from financing activities	(694)	(827)	(521)
Net change in cash and cash equivalents	5	(11)	(30)
Cash and cash equivalents at beginning of period	12	23	53
Cash and cash equivalents at end of period	17	12	23
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	542	462	417
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	479	407	351
Deferred income taxes and amortization of investment tax credits	361	275	300
Increase (Decrease) in Other Current Assets and Liabilities, Net	8	12	1
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	47	49	47
Other, net	(91)	(58)	(57)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Increase (Decrease) in Accounts and Other Receivables	61	(91)	3
Derivative collateral, net	5	33	(53)
Increase (Decrease) in Inventories	(27)	(53)	44
Pension and other postretirement benefit plans	(6)	(8)	(2)
Accrued property, income and other taxes	107	217	(252)
Increase (Decrease) in Accounts Payable	39	(76)	30
Increase (Decrease) in Other Current Assets and Liabilities, Net	8	12	1
Net cash flows from operating activities	1,403	1,351	823
Cash flows from investing activities:
Capital expenditures	(1,636)	(1,446)	(1,526)
Purchases of available-for-sale securities	(138)	(142)	(88)
Proceeds from sales of available-for-sale securities	158	135	80
Proceeds from Sales of Business, Affiliate and Productive Assets	0	0	8
Other, net	1	3	5
Net cash flows from investing activities	(1,615)	(1,450)	(1,521)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	62	649	840
Net proceeds from (repayments of) short-term debt	99	(50)	50
Repayments of Long-term Debt	(38)	(426)	(356)
Other, net	0	0	(1)
Net cash flows from financing activities	123	173	533
Net change in cash and cash equivalents	(89)	74	(165)
Cash and cash equivalents at beginning of period	103	29	194
Cash and cash equivalents at end of period	14	103	29
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income (loss) attributable to parent	532	458	409
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	479	407	351
Deferred income taxes and amortization of investment tax credits	362	276	298
Increase (Decrease) in Other Current Assets and Liabilities, Net	8	12	0
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	47	49	47
Other, net	(92)	(69)	(49)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Increase (Decrease) in Accounts and Other Receivables	61	(93)	2
Derivative collateral, net	5	33	(53)
Increase (Decrease) in Inventories	(27)	(53)	44
Pension and other postretirement benefit plans	(6)	(8)	(2)
Accrued property, income and other taxes	107	213	(253)
Increase (Decrease) in Accounts Payable	39	(76)	30
Increase (Decrease) in Other Current Assets and Liabilities, Net	8	12	0
Net cash flows from operating activities	1,393	1,335	820
Cash flows from investing activities:
Capital expenditures	(1,636)	(1,446)	(1,526)
Purchases of available-for-sale securities	(138)	(142)	(88)
Proceeds from sales of available-for-sale securities	158	135	80
Proceeds from Sales of Business, Affiliate and Productive Assets	2	13	10
Other, net	0	2	5
Net cash flows from investing activities	(1,614)	(1,438)	(1,519)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	62	649	840
Net proceeds from (repayments of) short-term debt	99	(50)	50
Repayments of Long-term Debt	(38)	(426)	(356)
Increase (Decrease) in Notes Payable, Related Parties, Current	9	3	1
Other, net	1	0	0
Net cash flows from financing activities	133	176	535
Net change in cash and cash equivalents	(88)	73	(164)
Cash and cash equivalents at beginning of period	103	30	194
Cash and cash equivalents at end of period	15	103	30
Nevada Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	279	288	227
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	1	(3)	15
Utilities Operating Expense, Depreciation and Amortization	303	297	274
Allowance for equity funds	(2)	(4)	(1)
Changes in regulatory assets and liabilities	131	4	2
Deferred Energy Change	(21)	176	(44)
Amortization of Deferred Charges	(107)	36	79
Deferred income taxes and amortization of investment tax credits	78	162	130
Other, net	0	13	68
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	26	(40)	(19)
Increase (Decrease) in Inventories	7	9	(15)
Accrued property, income and other taxes	63	0	1
Accounts payable and other liabilities	13	(46)	(13)
Net cash flows from operating activities	771	892	704
Cash flows from investing activities:
Capital expenditures	(335)	(320)	(371)
Proceeds from Sale of Other Property, Plant, and Equipment	0	9	0
Other, net	0	10	0
Net cash flows from investing activities	(335)	(301)	(371)
Cash flows from financing activities:
Repayments of Long-term Debt	(224)	(262)	(9)
Common stock dividends	(469)	(13)	(230)
Net cash flows from financing activities	(693)	(275)	(239)
Net change in cash and cash equivalents	(257)	316	94
Cash and cash equivalents at beginning of period	536	220	126
Cash and cash equivalents at end of period	279	536	220
Sierra Pacific Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	84	83	87
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	5	0	14
Utilities Operating Expense, Depreciation and Amortization	118	113	105
Allowance for equity funds	1	(2)	(3)
Changes in regulatory assets and liabilities	(17)	(21)	(23)
Deferred Energy Change	53	81	(30)
Amortization of Deferred Charges	(54)	17	19
Deferred income taxes and amortization of investment tax credits	49	47	47
Other, net	0	(9)	20
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	7	15	28
Increase (Decrease) in Inventories	(6)	1	3
Accrued property, income and other taxes	(3)	0	0
Accounts payable and other liabilities	6	17	(21)
Net cash flows from operating activities	243	342	246
Cash flows from investing activities:
Capital expenditures	(194)	(252)	(186)
Other, net	0	2	0
Net cash flows from investing activities	(194)	(250)	(186)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	1,089	0	0
Repayments of Long-term Debt	(1,138)	(1)	1
Common stock dividends	(51)	(7)	(105)
Other, net	0	0	(1)
Net cash flows from financing activities	(100)	(8)	(105)
Net change in cash and cash equivalents	(51)	84	(45)
Cash and cash equivalents at beginning of period	106	22	67
Cash and cash equivalents at end of period	$ 55	$ 106	$ 22