Statements of Cash Flows - MEC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Allowance for equity funds	(70)	(45)
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	23	26
Increase (Decrease) in Accounts Receivable and Other Operating Assets	550	226
Derivative collateral, net	(30)	(5)
Pension and other postretirement benefit plans	(41)	(23)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Purchases of marketable securities	190	209
Proceeds from sales of marketable securities	185	184
Other, net	36	43
Net cash flows from investing activities	(2,959)	(3,019)
Net proceeds from (repayments of) short-term debt	64	(1,048)
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	1,506	1,544
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	349	212
Depreciation and amortization	356	366
Amortization of Utility Plant to Other Operating Expense	17	17
Allowance for equity funds	(32)	(23)
Deferred income taxes and amortization of investment tax credits	52	(10)
Other Noncash Income (Expense)	5	7
Increase (Decrease) in Accounts Receivable and Other Operating Assets	2	(1)
Increase (Decrease) in Inventories	20	45
Derivative collateral, net	1	0
Pension and other postretirement benefit plans	(6)	(7)
Accrued property, income and other taxes, net	(263)	140
Accounts payable and other liabilities	(34)	(97)
Net cash flows from operating activities	463	651
Capital expenditures	(1,017)	(818)
Purchases of marketable securities	99	147
Proceeds from sales of marketable securities	95	125
Other, net	13	27
Net cash flows from investing activities	(1,008)	(813)
Proceeds from Issuance of Long-term Debt	1,460	687
Repayments of BHE senior debt and junior subordinated debentures	(500)	(350)
Net proceeds from (repayments of) short-term debt	(240)	0
Other, net	0	(1)
Net cash flows from financing activities	720	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	175	174
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	56	282
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 231	$ 456