XML 31 R61.htm IDEA: XBRL DOCUMENT v2.4.0.6
Income Taxes (LLC) (Details) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]    
Federal statutory income tax rate 35.00% 35.00%
Income tax credits (65.00%) (54.00%)
State income tax, net of federal income tax benefit (2.00%) (6.00%)
Effects of ratemaking (2.00%) (3.00%)
Other, net 2.00% 1.00%
Effective income tax rate (32.00%) (27.00%)
Production Tax Credit Carryforwards [Abstract]    
Years eligible for renewable energy production tax credit 10 years  
MEHC [Member]
   
Related Party Income Tax Receivable (Payable) [Abstract]    
Related Party Transaction, Cash (Paid) Received for Income Taxes, Net (160) 0