Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Net premiums, principally supplemental health insurance		$ 4,636	$ 4,648	$ 14,086	$ 13,951
Net investment income		870	811	2,569	2,408
Realized investment gains (losses):
Other-than-temporary impairment losses realized		(5)		(17)
Other-than-temporary impairment losses			(8)		(27)
Other gains (losses)	[1]	61	38	(59)	(139)
Total realized investment gains (losses)		56	30	(76)	(166)
Other income (loss)		15	17	53	50
Total revenues		5,577	5,506	16,632	16,243
Benefits and expenses:
Benefits and claims, net		3,002	3,083	9,075	9,174
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		315	271	932	848
Insurance commissions		331	332	1,007	996
Insurance and other expenses		730	686	2,193	2,025
Interest expense		53	59	164	181
Total acquisition and operating expenses		1,429	1,348	4,296	4,050
Total benefits and expenses		4,431	4,431	13,371	13,224
Earnings before income taxes		1,146	1,075	3,261	3,019
Income taxes		301	359	866	998
Net earnings		$ 845	$ 716	$ 2,395	$ 2,021
Net earnings per share:
Basic (in dollars per share)		$ 1.10	$ 0.91	$ 3.10	$ 2.54
Diluted (in dollars per share)		$ 1.09	$ 0.90	$ 3.08	$ 2.52
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		767,049	788,958	772,807	794,645
Diluted (in shares)		772,070	794,762	777,867	800,483
Cash dividends per share		$ 0.26	$ 0.22	$ 0.78	$ 0.65

[1] See Note 1 of the Notes to the Consolidated Financial Statements for the adoption of accounting guidance on January 1, 2018 related to financial instruments.