Consolidated Statement of Income (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Premiums		$ 6,523	$ 6,209	$ 19,057	$ 18,257
Net investment income		588	582	1,796	1,675
Fee income		113	116	342	352
Net realized investment gains	[1]	61	23	146	33
Other revenues		40	31	110	115
Total revenues		7,325	6,961	21,451	20,432
Claims and expenses
Claims and claim adjustment expenses		4,806	3,856	13,125	11,330
Amortization of deferred acquisition costs		1,059	1,012	3,094	2,972
General and administrative expenses		1,045	1,057	3,086	3,106
Interest expense		95	89	276	273
Total claims and expenses		7,005	6,014	19,581	17,681
Income before income taxes		320	947	1,870	2,751
Income tax expense		27	231	365	680
Net income		$ 293	$ 716	$ 1,505	$ 2,071
Net income per share
Basic (in dollars per share)		$ 1.06	$ 2.48	$ 5.39	$ 7.09
Diluted (in dollars per share)		$ 1.05	$ 2.45	$ 5.34	$ 7.00
Weighted average number of common shares outstanding
Basic (in shares)		274.1	286.0	277.1	290.0
Diluted (in shares)		276.6	289.8	279.6	293.6
Cash dividends declared per common share (in dollars per share)		$ 0.72	$ 0.67	$ 2.11	$ 1.95

[1] Total other-than-temporary impairment (OTTI) losses were $(5) million and $(4) million for the three months ended September 30, 2017 and 2016, respectively, and $(11) million and $(36) million for the nine months ended September 30, 2017 and 2016, respectively. Of total OTTI, credit losses of $(5) million and $(4) million for the three months ended September 30, 2017 and 2016, respectively, and $(12) million and $(26) million for the nine months ended September 30, 2017 and 2016, respectively, were recognized in net realized investment gains. In addition, unrealized gains (losses) from other changes in total OTTI of $0 million for each of the three months ended September 30, 2017 and 2016, and $1 million and $(10) million for the nine months ended September 30, 2017 and 2016, 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.