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Investments (Details 14)
$ in Millions
Sep. 30, 2015
USD ($)
Securities Posted as Collateral  
Fixed maturity securities posted as collateral for a reinsurance arrangement, derivative credit support annex (collateral) agreements, Futures Commission Merchant agreements, a lending arrangement and an obligation under funding agreements with the Federal Home Loan Bank of Des Moines $ 947.7
Commercial mortgage loans and home equity mortgages posted as collateral associated with obligation under funding agreements with the Federal Home Loan Bank of Des Moines 2,480.2
Securities posted as collateral eligible to be sold or repledged $ 110.0