Statements of Cash Flows - MEC - 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)
Deferred income taxes and amortization of investment tax credits	47	(21)
Other Noncash Income (Expense)	63	1
Trade receivables and other assets	(118)	144
Derivative collateral, net	(19)	(3)
Pension and other postretirement benefit plans	(23)	(21)
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)
Purchases of marketable securities	(188)	(159)
Proceeds from sales of marketable securities	180	153
Other, net	43	17
Net cash flows from investing activities	(1,474)	(1,415)
Net repayments of short-term debt	(1,109)	(311)
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
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	151	193
Depreciation and amortization	176	177
Amortization of Utility Plant to Other Operating Expense	9	8
Allowance for equity funds	(8)	(15)
Deferred income taxes and amortization of investment tax credits	91	31
Other Noncash Income (Expense)	13	3
Trade receivables and other assets	15	(30)
Increase (Decrease) in Inventories	(6)	55
Pension and other postretirement benefit plans	(6)	(3)
Accrued property, income and other taxes, net	(286)	(159)
Accounts payable and other liabilities	70	18
Net cash flows from operating activities	219	278
Capital expenditures	(472)	(573)
Purchases of marketable securities	(127)	(71)
Proceeds from sales of marketable securities	124	68
Other, net	5	1
Net cash flows from investing activities	(470)	(575)
Proceeds from Issuance of Long-term Debt	0	1,460
Repayments of BHE senior debt and junior subordinated debentures	0	(500)
Net repayments of short-term debt	50	(240)
Other, net	(1)	0
Net cash flows from financing activities	49	720
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(202)	423
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	330	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 128	$ 479