Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Net premiums, principally supplemental health insurance	$ 4,736	$ 4,636	$ 14,109	$ 14,086
Net investment income	936	870	2,692	2,569
Realized investment gains (losses):
Other-than-temporary impairment losses realized and loan loss reserves	(18)	(5)	(21)	(17)
Other gains (losses)	(135)	61	(126)	(59)
Total realized investment gains (losses)	(153)	56	(147)	(76)
Other income (loss)	17	15	50	53
Total revenues	5,536	5,577	16,704	16,632
Benefits and expenses:
Benefits and claims, net	3,027	3,002	8,958	9,075
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	317	315	967	932
Insurance commissions	330	331	990	1,007
Insurance and other expenses	769	730	2,230	2,193
Interest expense	57	53	171	164
Total acquisition and operating expenses	1,473	1,429	4,358	4,296
Total benefits and expenses	4,500	4,431	13,316	13,371
Earnings before income taxes	1,036	1,146	3,388	3,261
Income taxes	259	301	865	866
Net earnings	$ 777	$ 845	$ 2,523	$ 2,395
Net earnings per share:
Basic (in dollars per share)	$ 1.05	$ 1.10	$ 3.38	$ 3.10
Diluted (in dollars per share)	$ 1.04	$ 1.09	$ 3.37	$ 3.08
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	739,946	767,049	745,465	772,807
Diluted (in shares)	743,842	772,070	749,452	777,867
Cash dividends per share	$ 0.27	$ 0.26	$ 0.81	$ 0.78