Statements of Cash Flows - MEC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net Income (Loss) Attributable to Parent	$ 4,628	$ 2,443
Allowance for equity funds	(122)	(126)
Deferred income taxes and amortization of investment tax credits	791	(92)
Other Noncash Income (Expense)	(6)	44
Trade receivables and other assets	(1,668)	(594)
Derivative collateral, net	53	(19)
Pension and other postretirement benefit plans	(69)	(40)
Accrued property, income and other taxes, net	97	195
Accounts payable and other liabilities	796	109
Net cash flows from operating activities	4,520	4,660
Capital expenditures	(4,607)	(4,898)
Purchases of marketable securities	(322)	(242)
Proceeds from sales of marketable securities	308	223
Other, net	50	54
Net cash flows from investing activities	(6,633)	(6,035)
Net (repayments of) proceeds from short-term debt	(815)	594
Other, net	(60)	(42)
Net cash flows from financing activities	2,937	1,901
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	828	523
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	2,096	1,406
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	700	631
Depreciation and amortization	531	540
Amortization of Utility Plant to Other Operating Expense	25	25
Allowance for equity funds	(33)	(59)
Deferred income taxes and amortization of investment tax credits	76	31
Other Noncash Income (Expense)	(56)	16
Trade receivables and other assets	(15)	(1)
Increase (Decrease) in Inventories	(40)	3
Pension and other postretirement benefit plans	(17)	(9)
Accrued property, income and other taxes, net	(10)	(28)
Accounts payable and other liabilities	48	62
Net cash flows from operating activities	1,209	1,211
Capital expenditures	(1,341)	(1,909)
Purchases of marketable securities	(251)	(139)
Proceeds from sales of marketable securities	244	126
Other, net	9	19
Net cash flows from investing activities	(1,339)	(1,903)
Proceeds from Issuance of Long-term Debt	0	1,460
Repayments of BHE senior debt and junior subordinated debentures	0	(500)
Net (repayments of) proceeds from short-term debt	0	(240)
Other, net	(1)	0
Net cash flows from financing activities	(1)	720
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(131)	28
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	$ 199	$ 84