Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

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

	Three-Month Periods				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2017		2016		2017		2016
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(19	)	(16	)	(18	)	(15	)
State income tax, net of federal income tax benefit	—		—		(1	)	—
Income tax effect of foreign income	(3	)	(3	)	(4	)	(4	)
Equity income	1		1		1		1
Other, net	1		(1	)	—		—
Effective income tax rate	15	%	16	%	13	%	17	%

MidAmerican Energy Company [Member]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2017		2016		2017		2016
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(74	)	(58	)	(74	)	(58	)
State income tax, net of federal income tax benefit	(10	)	(6	)	(7	)	(4	)
Effects of ratemaking	(2	)	(1	)	(4	)	(3	)
Other, net	(1	)	—		—		—
Effective income tax rate	(52	)%	(30	)%	(50	)%	(30	)%

MidAmerican Funding, LLC and Subsidiaries [Domain]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to MidAmerican Funding's effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2017		2016		2017		2016
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(76	)	(60	)	(76	)	(61	)
State income tax, net of federal income tax benefit	(10	)	(7	)	(8	)	(4	)
Effects of ratemaking	(2	)	—		(4	)	(3	)
Effective income tax rate	(53	)%	(32	)%	(53	)%	(33	)%