Consolidated Statements of Cash Flows - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Income (Loss) Attributable to Parent	$ 556	$ 490
Deferred income taxes and amortization of investment tax credits	224	72
Other Noncash Income (Expense)	(5)	3
Derivative collateral, net	(23)	(3)
Pension and other postretirement benefit plans	(17)	(6)
Accrued property, income and other taxes	(187)	(2)
Net cash flows from operating activities	1,418	1,360
Capital expenditures	(865)	(1,027)
Purchases of available-for-sale securities	(81)	(34)
Proceeds from sales of available-for-sale securities	83	61
Other, net	(9)	(39)
Net cash flows from investing activities	(1,450)	(1,284)
Net proceeds from short-term debt	140	722
Other, net	(12)	(11)
Net cash flows from financing activities	328	(99)
Net change in cash and cash equivalents	297	(22)
Cash and cash equivalents at beginning of period	721	1,108
Cash and cash equivalents at end of period	1,018	1,086
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net Income (Loss) Attributable to Parent	102	73
Utilities Operating Expense, Depreciation and Amortization	117	110
Deferred income taxes and amortization of investment tax credits	13	11
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	10	11
Other Noncash Income (Expense)	(6)	(13)
Increase (Decrease) in Accounts and Other Receivables	41	31
Increase (Decrease) in Inventories	22	(1)
Derivative collateral, net	0	2
Pension and other postretirement benefit plans	(3)	(2)
Increase (Decrease) in Accounts Payable	2	4
Accrued property, income and other taxes	(73)	(51)
Increase (Decrease) in Other Current Assets and Liabilities, Net	(11)	(12)
Net cash flows from operating activities	214	163
Capital expenditures	(238)	(332)
Purchases of available-for-sale securities	(40)	(34)
Proceeds from sales of available-for-sale securities	35	29
Other, net	7	(2)
Net cash flows from investing activities	(236)	(339)
Proceeds from Issuance of Long-term Debt	843	0
Repayments of Long-term Debt	(255)	(4)
Increase (Decrease) in Notes Payable, Related Parties, Current	8	9
Net proceeds from short-term debt	(99)	70
Net cash flows from financing activities	497	75
Net change in cash and cash equivalents	475	(101)
Cash and cash equivalents at beginning of period	15	103
Cash and cash equivalents at end of period	$ 490	$ 2