Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Net earned premiums	$ 1,734	$ 1,730	$ 3,379	$ 3,429
Net investment income	475	502	1,020	937
Net realized investment gains (losses):
Other-than-temporary impairment losses	(2)	(15)	(4)	(38)
Other net realized investment gains	52	31	90	18
Net realized investment gains (losses) on fixed maturity securities	50	16	86	(20)
Other revenues	107	100	211	197
Total revenues	2,366	2,348	4,696	4,543
Claims, Benefits and Expenses
Insurance claims and policyholders’ benefits	1,280	1,339	2,573	2,747
Amortization of deferred acquisition costs	312	305	617	612
Other operating expenses	364	378	710	759
Interest	40	38	83	80
Total claims, benefits and expenses	1,996	2,060	3,983	4,198
Income before income tax	370	288	713	345
Income tax expense	(98)	(79)	(181)	(70)
Net income	$ 272	$ 209	$ 532	$ 275
Basic earnings per share (dollars per share)	$ 1.01	$ 0.77	$ 1.96	$ 1.02
Diluted earnings per share (dollars per share)	1.00	0.77	1.96	1.02
Dividends per share (dollars per share)	$ 0.25	$ 0.25	$ 2.50	$ 2.50
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic (in shares)	271.1	270.5	271.0	270.4
Diluted (in shares)	271.9	270.9	271.9	270.9