Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Income (Loss) Attributable to Parent	$ 670	$ 622
Allowance for equity funds	(34)	(32)
Changes in regulatory assets and liabilities	0	(52)
Deferred income taxes and amortization of investment tax credits	47	(21)
Other Noncash Income (Expense)	63	1
Trade receivables and other assets	(118)	144
Accrued property, income and other taxes, net	(364)	(48)
Accounts payable and other liabilities	117	68
Net cash flows from operating activities	1,165	1,488
Capital expenditures	(1,356)	(1,393)
Payments for (Proceeds from) Other Investing Activities	(43)	(17)
Net cash flows from investing activities	(1,474)	(1,415)
Other, net	(34)	(21)
Net cash flows from financing activities	1,358	900
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	1,036	974
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	2,304	1,857
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	(4)	6
Depreciation and amortization	90	89
Allowance for equity funds	(2)	(1)
Changes in regulatory assets and liabilities	3	28
Deferred income taxes and amortization of investment tax credits	(4)	2
Deferred Energy Change	4	(33)
Amortization of Deferred Charges	0	3
Other Noncash Income (Expense)	8	(5)
Trade receivables and other assets	32	48
Increase (Decrease) in Inventories	(1)	(2)
Accrued property, income and other taxes, net	(6)	(11)
Accounts payable and other liabilities	(41)	11
Net cash flows from operating activities	79	135
Capital expenditures	(111)	(113)
Payments for (Proceeds from) Other Investing Activities	0	(2)
Net cash flows from investing activities	(111)	(111)
Proceeds from Issuance of Long-term Debt	719	495
Repayments of BHE senior debt and junior subordinated debentures	(575)	(500)
Payments of Ordinary Dividends, Common Stock	0	(75)
Other, net	(4)	(3)
Net cash flows from financing activities	140	(83)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	108	(59)
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	$ 133	$ 62