Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 3,877	$ 4,673
Investment securities	13,251	12,554
Receivables, less allowance for doubtful accounts of $71 in 2021 and $72 in 2020	2,196	1,138
Other current assets	6,202	5,276
Total current assets	25,526	23,641
Property and equipment, net	2,507	2,371
Long-term investment securities	1,120	1,212
Equity method investments	1,205	1,170
Goodwill	4,602	4,447
Other long-term assets	2,455	2,128
Total assets	37,415	34,969
Current liabilities:
Benefits payable	8,651	8,143
Trade accounts payable and accrued expenses	4,777	4,013
Book overdraft	343	320
Unearned revenues	325	318
Short-term debt	1,204	600
Total current liabilities	15,300	13,394
Long-term debt	6,062	6,060
Other long-term liabilities	1,863	1,787
Total liabilities	23,225	21,241
Stockholders’ equity:
Preferred stock, $1 par; 10,000,000 shares authorized; none issued	0	0
Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 198,648,742 shares issued at March 31, 2021 and December 31, 2020	33	33
Capital in excess of par value	2,712	2,705
Retained earnings	21,252	20,517
Accumulated other comprehensive income	108	391
Treasury stock, at cost, 69,634,315 shares at March 31, 2021 and 69,787,614 shares at December 31, 2020	(9,915)	(9,918)
Total stockholders’ equity	14,190	13,728
Total liabilities and stockholders’ equity	$ 37,415	$ 34,969