Consolidated Statements of Cash Flows - MEC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Income (Loss) Attributable to Parent	$ 490	$ 469
Deferred income taxes and amortization of investment tax credits	72	206
Other Noncash Income (Expense)	(3)	10
Increase (Decrease) in Counterparty Collateral, Net	3	21
Pension and other postretirement benefit plans	(6)	(4)
Accrued property, income and other taxes	(2)	(99)
Net cash flows from operating activities	1,360	1,107
Payments to Acquire Property, Plant, and Equipment	1,027	1,426
Payments to Acquire Available-for-sale Securities	34	68
Proceeds from sales of available-for-sale securities	61	57
Payments for (Proceeds from) Other Investing Activities	39	(41)
Net cash flows from investing activities	(1,284)	(1,455)
Net proceeds from short-term debt	722	163
Other, net	(11)	(19)
Net cash flows from financing activities	(99)	239
Net change in cash and cash equivalents	(22)	(110)
Cash and cash equivalents at beginning of period	1,108	617
Cash and cash equivalents at end of period	1,086	507
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	76	94
Utilities Operating Expense, Depreciation and Amortization	110	100
Deferred income taxes and amortization of investment tax credits	11	0
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	(11)	(11)
Other Noncash Income (Expense)	13	(7)
Increase (Decrease) in Accounts and Other Receivables	(28)	(43)
Increase (Decrease) in Inventories	1	(34)
Increase (Decrease) in Counterparty Collateral, Net	(2)	(15)
Pension and other postretirement benefit plans	(2)	(2)
Increase (Decrease) in Accounts Payable	4	(45)
Accrued property, income and other taxes	(48)	(40)
Increase (Decrease) in Other Current Assets and Liabilities, Net	6	11
Net cash flows from operating activities	172	206
Payments to Acquire Property, Plant, and Equipment	332	244
Payments to Acquire Available-for-sale Securities	34	27
Proceeds from sales of available-for-sale securities	29	19
Payments for (Proceeds from) Other Investing Activities	3	(2)
Net cash flows from investing activities	(340)	(250)
Repayments of Long-term Debt	4	0
Net proceeds from short-term debt	70	15
Net cash flows from financing activities	66	15
Net change in cash and cash equivalents	(102)	(29)
Cash and cash equivalents at beginning of period	103	29
Cash and cash equivalents at end of period	$ 1	$ 0