Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 6,054	$ 4,054
Investment securities	11,104	10,972
Receivables, less allowance for doubtful accounts of $73 in 2020 and $69 in 2019	2,009	1,056
Other current assets	5,384	3,806
Total current assets	24,551	19,888
Property and equipment, net	2,023	1,955
Long-term investment securities	393	406
Equity method investments	1,093	1,063
Goodwill	4,443	3,928
Other long-term assets	2,130	1,834
Total assets	34,633	29,074
Current liabilities:
Benefits payable	7,090	6,004
Trade accounts payable and accrued expenses	5,399	3,754
Book overdraft	169	225
Unearned revenues	274	247
Short-term debt	1,898	699
Total current liabilities	14,830	10,929
Long-term debt	6,057	4,967
Future policy benefits payable	205	206
Other long-term liabilities	1,186	935
Total liabilities	22,278	17,037
Commitments and contingencies (Note 13)
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; 198,629,992 shares issued at March 31, 2020 and December 31, 2019	33	33
Capital in excess of par value	2,857	2,820
Retained earnings	17,871	17,483
Accumulated other comprehensive income	48	156
Treasury stock, at cost, 66,423,923 shares at March 31, 2020 and 66,524,771 shares at December 31, 2019	(8,454)	(8,455)
Total stockholders’ equity	12,355	12,037
Total liabilities and stockholders’ equity	$ 34,633	$ 29,074