Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 4,142	$ 4,042
Investment securities	9,695	9,557
Receivables, less allowance for doubtful accounts of $92 in 2018 and $96 in 2017	1,062	854
Other current assets	4,178	2,949
Total current assets	19,077	17,402
Property and equipment, net	1,685	1,584
Long-term investment securities	405	2,745
Equity method investment in Kindred at Home	1,048	0
Goodwill	3,895	3,281
Other long-term assets	1,380	2,166
Total assets	27,490	27,178
Current liabilities:
Benefits payable	5,020	4,668
Trade accounts payable and accrued expenses	5,413	4,069
Book overdraft	199	141
Unearned revenues	294	378
Short-term debt	398	150
Total current liabilities	11,324	9,406
Long-term debt	4,774	4,770
Future policy benefits payable	196	2,923
Other long-term liabilities	603	237
Total liabilities	16,897	17,336
Commitments and contingencies (Note 14)
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; 198,593,361 shares issued at September 30, 2018 and 198,572,458 shares issued at December 31, 2017	33	33
Capital in excess of par value	2,707	2,445
Retained earnings	14,786	13,670
Accumulated other comprehensive (loss) income	(206)	19
Treasury stock, at cost, 61,406,481 shares at September 30, 2018 and 60,893,762 shares at December 31, 2017	(6,727)	(6,325)
Total stockholders’ equity	10,593	9,842
Total liabilities and stockholders’ equity	$ 27,490	$ 27,178