Consolidated Statement of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Revenues
Premiums	$ 5,823		$ 5,517
Net investment income	736		670
Fee income	107		97
Net realized investment gains	1	[1]	10	[1]
Other revenues	41		34
Total revenues	6,708		6,328
Claims and expenses
Claims and claim adjustment expenses	3,315		3,153
Amortization of deferred acquisition costs	950		948
General and administrative expenses	881		915
Interest expense	92		92
Total claims and expenses	5,238		5,108
Income before income taxes	1,470		1,220
Income tax expense	418		324
Net income	$ 1,052		$ 896
Net income per share
Net income per share, basic	$ 2.98		$ 2.36
Net income per share, diluted	$ 2.95		$ 2.33
Weighted average number of common shares outstanding
Weighted average number of common shares outstanding, basic	350.9		377.7
Weighted average number of common shares outstanding, diluted	354.6		381.9

[1] Total other-than-temporary impairment (OTTI) gains (losses) were $(7) million for the three months ended March 31, 2014 and $0 million for the three months ended March 31, 2013. Of total OTTI, credit losses of $(9) million and $(5) million for the three months ended March 31, 2014 and 2013, respectively, were recognized in net realized investment gains. In addition, unrealized gains from other changes in total OTTI of $2 million and $5 million for the three months ended March 31, 2014 and 2013, respectively, were recognized in other comprehensive income (loss) as part of changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.