Consolidated Statement of Income (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Premiums	$ 6,955	$ 6,988	$ 14,184	$ 13,843
Net investment income	268	648	879	1,230
Fee income	114	116	222	225
Net realized investment gains (losses)	13	25	(85)	78
Other revenues	51	57	109	129
Total revenues	7,401	7,834	15,309	15,505
Claims and expenses
Claims and claim adjustment expenses	5,107	4,821	9,896	9,263
Amortization of deferred acquisition costs	1,173	1,134	2,351	2,251
General and administrative expenses	1,121	1,125	2,258	2,182
Interest expense	85	89	169	177
Total claims and expenses	7,486	7,169	14,674	13,873
Income (loss) before income taxes	(85)	665	635	1,632
Income tax expense (benefit)	(45)	108	75	279
Net income (loss)	$ (40)	$ 557	$ 560	$ 1,353
Net income (loss) per share
Basic (in dollars per share)	$ (0.16)	$ 2.11	$ 2.19	$ 5.12
Diluted (in dollars per share)	$ (0.16)	$ 2.10	$ 2.19	$ 5.08
Weighted average number of common shares outstanding
Basic (in shares)	251.6	261.3	253.6	262.1
Diluted (in shares)	251.6	263.7	254.7	264.2
Cash dividends declared per common share (in dollars per share)	$ 0.85	$ 0.82	$ 1.67	$ 1.59