Consolidated Statements Of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Premiums	$ 25,092	$ 23,501	$ 50,609	$ 46,344
Product revenue	2,543	144	4,887	144
Administrative fees and other revenue	1,543	1,532	3,130	3,077
Total operating revenue	29,178	25,177	58,626	49,565
Net investment income	57	285	311	495
Net realized gains (losses) on financial instruments	18	11	(6)	89
Impairment losses on investments:
Total impairment recoveries (losses) on investments	6	(9)	(95)	(22)
Non-credit component of impairment losses on investments recognized in other comprehensive income before tax	5	2	49	5
Impairment recoveries (losses) recognized in income	11	(7)	(46)	(17)
Total revenues	29,264	25,466	58,885	50,132
Expenses
Benefit expense	19,547	20,368	41,036	39,650
Cost of products sold	2,225	98	4,209	98
Selling, general and administrative expense	4,046	3,278	7,827	6,444
Interest expense	201	184	395	371
Amortization of other intangible assets	93	85	176	172
Loss (gain) on extinguishment of debt	3	0	4	(1)
Total expenses	26,115	24,013	53,647	46,734
Income before income tax expense	3,149	1,453	5,238	3,398
Income tax expense	873	314	1,439	708
Net income	$ 2,276	$ 1,139	$ 3,799	$ 2,690
Net income per share
Basic net income per share	$ 9.02	$ 4.44	$ 15.06	$ 10.47
Diluted net income per share	8.91	4.36	14.85	10.28
Dividends per share	$ 0.95	$ 0.80	$ 1.90	$ 1.60