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Consolidated Balance Sheets (Parentheticals) (USD $)
In Millions, except Per Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Consolidated Balance Sheets    
Fixed maturities, at amortized cost $ 14,257 $ 13,445
Equity Securities, at cost $ 124 $ 144
Common stock par value $ 0.25 $ 0.25
Common stock shares issued 366 351
Common Stock Shares Authorized 600 600