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Capital Notes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2013
Capital Notes [Abstract]    
Capital notes issued $ 10  
Debt instrument, interest rate, stated percentage   6.00%
Debt instrument, maturity date   Apr. 01, 2017
Duration of written notice to holders   30 days
Payment on maturity principal   $ 7