Consolidated Statement of Income (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Premiums		$ 6,067	$ 5,931	$ 12,048	$ 11,819
Net investment income		549	632	1,093	1,224
Fee income		119	115	236	229
Net realized investment gains	[1]	19	10	10	20
Other revenues		31	22	84	47
Total revenues		6,785	6,710	13,471	13,339
Claims and expenses
Claims and claim adjustment expenses		3,762	3,547	7,474	6,978
Amortization of deferred acquisition costs		989	963	1,960	1,926
General and administrative expenses		1,054	1,032	2,049	2,027
Interest expense		93	92	184	184
Total claims and expenses		5,898	5,634	11,667	11,115
Income before income taxes		887	1,076	1,804	2,224
Income tax expense		223	264	449	579
Net income		$ 664	$ 812	$ 1,355	$ 1,645
Net income per share
Basic		$ 2.27	$ 2.56	$ 4.60	$ 5.14
Diluted		$ 2.24	$ 2.53	$ 4.55	$ 5.08
Weighted average number of common shares outstanding
Basic		290.1	314.8	292.1	317.7
Diluted		293.6	318.0	295.6	321.2
Cash dividends declared per share		$ 0.67	$ 0.61	$ 1.28	$ 1.16

[1] Total other-than-temporary impairment (OTTI) losses were $(4) million and $(8) million for the three months ended June 30, 2016 and 2015, respectively, and $(32) million and $(12) million for the six months ended June 30, 2016 and 2015, respectively. Of total OTTI, credit losses of $(4) million and $(6) million for the three months ended June 30, 2016 and 2015, respectively, and $(22) million and $(9) million for the six months ended June 30, 2016 and 2015, respectively, were recognized in net realized investment gains. In addition, unrealized gains (losses) from other changes in total OTTI of $0 million and $(2) million for the three months ended June 30, 2016 and 2015, respectively, and $(10) million and $(3) million for the six months ended June 30, 2016 and 2015, 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.