Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Attributable to Parent	$ 2,443	$ 2,286
Allowance for equity funds	(126)	(75)
Changes in regulatory assets and liabilities	108	263
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other Noncash Income (Expense)	44	40
Trade receivables and other assets	(594)	(192)
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Capital expenditures	(4,898)	(4,203)
Net cash flows from investing activities	(6,035)	(4,517)
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	523	119
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	1,406	1,402
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	240	228
Depreciation and amortization	267	253
Allowance for equity funds	(4)	(2)
Changes in regulatory assets and liabilities	62	75
Deferred income taxes and amortization of investment tax credits	(42)	(7)
Deferred Energy Change	39	12
Amortization of Deferred Charges	37	13
Other Noncash Income (Expense)	(4)	8
Trade receivables and other assets	(110)	(138)
Increase (Decrease) in Inventories	2	1
Accrued property, income and other taxes, net	53	54
Accounts payable and other liabilities	15	(11)
Net cash flows from operating activities	555	486
Capital expenditures	(283)	(203)
Proceeds from Sale of Other Assets, Investing Activities	2	1
Net cash flows from investing activities	(281)	(202)
Proceeds from Issuance of Long-term Debt	495	573
Repayments of BHE senior debt and junior subordinated debentures	(500)	(824)
Payments of Ordinary Dividends, Common Stock	(95)	0
Other, net	(11)	(12)
Net cash flows from financing activities	(111)	(263)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	163	21
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	$ 284	$ 87