Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 2,801	$ 2,571
Investment securities	7,738	7,267
Receivables, less allowance for doubtful accounts of $115 in 2016 and $101 in 2015:	1,737	1,161
Other current assets	5,568	4,712
Total current assets	17,844	15,711
Property and equipment, net	1,420	1,384
Long-term investment securities	1,940	1,843
Goodwill	3,265	3,265
Other long-term assets	2,465	2,475
Total assets	26,934	24,678
Current liabilities:
Benefits payable	5,114	4,976
Trade accounts payable and accrued expenses	4,074	2,212
Book overdraft	257	301
Unearned revenues	360	364
Short-term borrowings	300	299
Total current liabilities	10,105	8,152
Long-term debt	3,793	3,794
Future policy benefits payable	2,233	2,151
Other long-term liabilities	278	235
Total liabilities	$ 16,409	$ 14,332
Commitments and contingencies
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; 198,393,793 shares issued at March 31, 2016 and 198,372,059 shares issued at December 31, 2015	33	33
Capital in excess of par value	2,498	2,530
Retained earnings	11,205	11,017
Accumulated other comprehensive income	76	58
Treasury stock, at cost, 49,357,139 shares at March 31, 2016 and 50,084,043 shares at December 31, 2015	(3,287)	(3,292)
Total stockholders’ equity	10,525	10,346
Total liabilities and stockholders’ equity	$ 26,934	$ 24,678