Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Allowance for equity funds	(70)	(45)
Changes in regulatory assets and liabilities	1	206
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	23	26
Trade receivables and other assets	(550)	(226)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Net cash flows from investing activities	(2,959)	(3,019)
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,506	1,544
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	75	64
Depreciation and amortization	178	168
Allowance for equity funds	(2)	(1)
Changes in regulatory assets and liabilities	3	28
Deferred income taxes and amortization of investment tax credits	(9)	(14)
Deferred Energy Change	13	25
Amortization of Deferred Charges	12	7
Other Noncash Income (Expense)	(6)	9
Trade receivables and other assets	(47)	(62)
Increase (Decrease) in Inventories	(3)	1
Accrued property, income and other taxes, net	21	12
Accounts payable and other liabilities	30	13
Net cash flows from operating activities	265	250
Capital expenditures	(191)	(135)
Proceeds from Sale of Other Assets, Investing Activities	2	1
Net cash flows from investing activities	(189)	(134)
Proceeds from Issuance of Long-term Debt	495	573
Repayments of BHE senior debt and junior subordinated debentures	(500)	(325)
Payments of Ordinary Dividends, Common Stock	(95)	0
Other, net	(7)	(7)
Net cash flows from financing activities	(107)	241
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(31)	357
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	121	66
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 90	$ 423