Income Taxes (MEC) (MidAmerican Energy Company and Subsidiaries [Member])

3 Months Ended

Mar. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Notes to Consolidated Financial Statements [Line Items]

Income Tax Disclosure [Text Block]

(6) Income Taxes

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax (benefit) expense is as follows:

	Three-Month Periods
	Ended March 31,
	2012		2011
Federal statutory income tax rate	35	%	35	%
Amortization of investment tax credit	—		(1	)
State income tax, net of federal income tax benefit	8		7
Renewable electricity production tax credits	(49	)	(29	)
Effects of ratemaking	(13	)	(5	)
Other, net	—		(1	)
Effective income tax rate	(19	)%	6	%

MidAmerican Energy's wind-powered generating facilities are eligible for federal renewable electricity production tax credits for 10 years from the date the facilities were placed in service.