Statements of Cash Flows - MEC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent	$ 622	$ 513
Allowance for equity funds	(32)	(21)
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other Noncash Income (Expense)	1	19
Derivative collateral, net	(3)	(14)
Pension and other postretirement benefit plans	(21)	(21)
Accrued property, income and other taxes, net	(48)	(60)
Net cash flows from operating activities	1,488	1,479
Capital expenditures	(1,393)	(1,075)
Purchases of marketable securities	159	155
Proceeds from sales of marketable securities	153	132
Other, net	17	31
Net cash flows from investing activities	(1,415)	(1,223)
Net repayments of short-term debt	(311)	(1,873)
Other, net	(21)	(14)
Net cash flows from financing activities	900	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,661
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	1,876
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	193	106
Depreciation and amortization	177	158
Amortization of Utility Plant to Other Operating Expense	8	8
Allowance for equity funds	(15)	(10)
Deferred income taxes and amortization of investment tax credits	31	19
Other Noncash Income (Expense)	3	2
Increase (Decrease) in Accounts Receivable and Other Current Operating Assets	30	(15)
Increase (Decrease) in Inventories	55	37
Derivative collateral, net	0	(2)
Pension and other postretirement benefit plans	(3)	(3)
Increase (Decease) in Accounts Payable and Other Current Operating Liabilities	18	(18)
Accrued property, income and other taxes, net	(159)	(82)
Net cash flows from operating activities	278	230
Capital expenditures	(573)	(365)
Purchases of marketable securities	71	95
Proceeds from sales of marketable securities	68	74
Other, net	1	15
Net cash flows from investing activities	(575)	(371)
Proceeds from Issuance of Long-term Debt	1,460	687
Repayments of BHE senior debt and junior subordinated debentures	(500)	(350)
Net repayments of short-term debt	(240)	0
Net cash flows from financing activities	720	337
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	423	196
Cash and cash equivalents and restricted cash and cash equivalents at end of period	432
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 479	$ 478