Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net Income (Loss) Attributable to Parent	$ 4,628	$ 2,443
Allowance for equity funds	(122)	(126)
Changes in regulatory assets and liabilities	(87)	108
Deferred income taxes and amortization of investment tax credits	791	(92)
Other Noncash Income (Expense)	(6)	44
Trade receivables and other assets	(1,668)	(594)
Accrued property, income and other taxes, net	97	195
Accounts payable and other liabilities	796	109
Net cash flows from operating activities	4,520	4,660
Capital expenditures	(4,607)	(4,898)
Net cash flows from investing activities	(6,633)	(6,035)
Other, net	(60)	(42)
Net cash flows from financing activities	2,937	1,901
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	828	523
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	1,268	883
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	2,096	1,406
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	273	240
Depreciation and amortization	273	267
Allowance for equity funds	(5)	(4)
Changes in regulatory assets and liabilities	38	62
Deferred income taxes and amortization of investment tax credits	(3)	(42)
Deferred Energy Change	(38)	39
Amortization of Deferred Charges	(30)	37
Other Noncash Income (Expense)	5	(4)
Trade receivables and other assets	(112)	(110)
Increase (Decrease) in Inventories	(4)	2
Accrued property, income and other taxes, net	48	53
Accounts payable and other liabilities	(39)	15
Net cash flows from operating activities	406	555
Capital expenditures	(343)	(283)
Proceeds from Sale of Other Assets, Investing Activities	26	2
Net cash flows from investing activities	(317)	(281)
Proceeds from Issuance of Long-term Debt	718	495
Repayments of BHE senior debt and junior subordinated debentures	(575)	(500)
Payments of Ordinary Dividends, Common Stock	(85)	(95)
Other, net	(12)	(11)
Net cash flows from financing activities	46	(111)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	135	163
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	25	121
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 160	$ 284