XML 113 R90.htm IDEA: XBRL DOCUMENT v2.4.0.6
Common Stock (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
ratio
Dec. 31, 2010
Class of Stock [Line Items]    
Contribution of Common stock to the Pension Plan Value   $ 100
Maximum Total Funded Debt to Total Capitalization Ratio 65.00%  
Maximum Total Funded Debt to Total Capitilization Ration Denominator 100.00%  
Line of Credit Facility, Dividend Restrictions 128 46
Retained Earnings (Accumulated Deficit) $ 3,750 $ 3,431