Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Net Income (Loss) Attributable to Parent	$ 885	$ 1,130
Allowance for equity funds	(45)	(35)
Deferred income taxes and amortization of investment tax credits	(264)	341
Changes in regulatory assets and liabilities	206	21
Other Noncash Income (Expense)	26	8
Trade receivables and other assets	(226)	(73)
Accrued property, income and other taxes, net	174	(244)
Accounts payable and other liabilities	16	20
Net cash flows from operating activities	2,818	2,428
Capital expenditures	(2,779)	(1,813)
Acquisitions, net of cash acquired		(588)
Payments for (Proceeds from) Other Investing Activities	(43)	6
Net cash flows from investing activities	(3,019)	(2,481)
Repayments of BHE senior debt and junior subordinated debentures	(650)	(950)
Net cash flows from financing activities	465	112
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	261	62
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,283	1,003
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,544	1,065
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	64	87
Other Nonrecurring (Income) Expense	0	(1)
Utilities Operating Expense, Depreciation and Amortization	168	154
Allowance for equity funds	(1)	(1)
Deferred income taxes and amortization of investment tax credits	(14)	34
Changes in regulatory assets and liabilities	28	13
Deferred Energy Change	25	(25)
Amortization of Deferred Charges	7	7
Other Noncash Income (Expense)	9	(2)
Trade receivables and other assets	(62)	(88)
Increase (Decrease) in Inventories	1	7
Accrued property, income and other taxes, net	12	18
Accounts payable and other liabilities	13	48
Net cash flows from operating activities	250	251
Capital expenditures	(135)	(139)
Acquisitions, net of cash acquired	0	(77)
Payments for (Proceeds from) Other Investing Activities	(1)	(4)
Net cash flows from investing activities	(134)	(212)
Proceeds from Issuance of Long-term Debt	573	91
Repayments of BHE senior debt and junior subordinated debentures	(332)	(81)
Payments of Ordinary Dividends, Common Stock	0	(322)
Net cash flows from financing activities	241	(312)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	357	(273)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	66	290
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 423	$ 17