Consolidated Statement of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Revenues
Premiums	$ 5,517		$ 5,523
Net investment income	670		740
Fee income	97		82
Net realized investment gains	10	[1]	10	[1]
Other revenues	34		37
Total revenues	6,328		6,392
Claims and expenses
Claims and claim adjustment expenses	3,153		3,364
Amortization of deferred acquisition costs	948		971
General and administrative expenses	915		884
Interest expense	92		96
Total claims and expenses	5,108		5,315
Income before income taxes	1,220		1,077
Income tax expense	324		271
Net income	$ 896		$ 806
Net income per share
Net income per share, basic	$ 2.36		$ 2.04
Net income per share, diluted	$ 2.33		$ 2.02
Weighted average number of common shares outstanding
Weighted average number of common shares outstanding, basic	377.7		392.0
Weighted average number of common shares outstanding, diluted	381.9		395.8

[1] Total other-than-temporary impairment (OTTI) gains were $0 million for each of the three months ended March 31, 2013 and 2012. Of total OTTI, credit losses of $(5) million and $(4) million for the three months ended March 31, 2013 and 2012, respectively, were recognized in net realized investment gains. In addition, unrealized gains from other changes in total OTTI of $5 million and $4 million for the three months ended March 31, 2013 and 2012, respectively, were recognized in other comprehensive income as part of changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.