Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Sep. 30, 2011	Dec. 31, 2010
Consolidated Condensed Balance Sheets [Abstract]
Fixed maturities, amortized cost	$ 37,144	$ 36,677
Equity securities, cost	$ 935	$ 979
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	100,000,000	100,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,800,000,000	1,800,000,000
Common stock, shares issued	415,156,538	414,930,507
Treasury stock, shares	17,754,138	384,400