Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 3,394	$ 4,673
Investment securities	13,192	12,554
Receivables, less allowance for doubtful accounts of $83 in 2021 and $72 in 2020	1,814	1,138
Other current assets	6,493	5,276
Total current assets	24,893	23,641
Property and equipment, net	3,073	2,371
Long-term investment securities	780	1,212
Goodwill	11,092	4,447
Equity method investments	141	1,170
Other long-term assets	4,379	2,128
Total assets	44,358	34,969
Current liabilities:
Benefits payable	8,289	8,143
Trade accounts payable and accrued expenses	4,509	4,013
Book overdraft	326	320
Unearned revenues	254	318
Short-term debt	1,953	600
Total current liabilities	15,331	13,394
Long-term debt	10,541	6,060
Other long-term liabilities	2,383	1,787
Total liabilities	28,255	21,241
Commitments and contingencies (Note 17)
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 December 31, 2021 and December 31, 2020	33	33
Capital in excess of par value	3,082	2,705
Retained earnings	23,086	20,517
Accumulated other comprehensive income	42	391
Treasury stock, at cost, 69,846,758 shares at December 31, 2021 and 69,787,914 shares at December 31, 2020	(10,163)	(9,918)
Noncontrolling interests	23	0
Total stockholders’ equity	16,103	13,728
Total liabilities and stockholders’ equity	$ 44,358	$ 34,969