Consolidated Statement of Income (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenues
Premiums		$ 6,855	$ 6,537
Net investment income		582	603
Fee income		109	103
Net realized investment gains (losses)	[1]	53	(11)
Other revenues		72	54
Total revenues		7,671	7,286
Claims and expenses
Claims and claim adjustment expenses		4,442	4,296
Amortization of deferred acquisition costs		1,117	1,061
General and administrative expenses		1,057	1,062
Interest expense		88	89
Total claims and expenses		6,704	6,508
Income before income taxes		967	778
Income tax expense		171	109
Net income		$ 796	$ 669
Net income per share
Basic (in dollars per share)		$ 3.01	$ 2.45
Diluted (in dollars per share)		$ 2.99	$ 2.42
Weighted average number of common shares outstanding
Basic (in shares)		262.9	271.0
Diluted (in shares)		264.8	273.9
Cash dividends declared per common share (in dollars per share)		$ 0.77	$ 0.72

[1] Total other-than-temporary impairment (OTTI) gains (losses) were $(1) million and $0 for the three months ended March 31, 2019 and 2018, respectively. Of total OTTI, credit losses of $(1) million and $0 for the three months ended March 31, 2019 and 2018, respectively, were recognized in net realized investment gains (losses). In addition, unrealized gains (losses) from other changes in total OTTI of $0 for each of the three months ended March 31, 2019 and 2018, respectively, were recognized in other comprehensive income (loss) as part of changes in net unrealized gains (losses) on investment securities having credit losses recognized in the consolidated statement of income.