Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed Maturities, cost	$ 36,467	$ 36,958
Equity Securities, cost	$ 1,083	$ 1,089
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares issued	371,980,460	371,980,460
Treasury Stock, Shares	145,003,131	139,551,071