Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Cash receipts from customers	$ 108,324	$ 95,816
Cash paid for inventory and prescriptions dispensed by retail network pharmacies	(89,530)	(77,067)
Cash paid to other suppliers and employees	(11,240)	(11,267)
Interest received	15	11
Interest paid	(423)	(458)
Income taxes paid	(2,305)	(2,321)
Net cash provided by operating activities	4,841	4,714
Cash flows from investing activities:
Purchases of property and equipment	(1,490)	(1,436)
Proceeds from sale-leaseback transactions	34	328
Proceeds from sale of property and equipment and other assets	28	8
Acquisitions (net of cash acquired) and other investments	(9,503)	(2,392)
Purchase of available-for-sale investments	184	161
Sales/maturities of available-for-sale investments	115	119
Net cash used in investing activities	(11,000)	(3,534)
Cash flows from financing activities:
Increase (decrease) in short-term debt	(685)	775
Proceeds from issuance of long-term debt	14,808	1,483
Repayments of long-term debt	2,898	3,086
Dividends paid	(1,185)	(971)
Proceeds from exercise of stock options	277	378
Excess tax benefits from stock-based compensation	132	89
Repurchase of common stock	(3,871)	(2,801)
Other	(2)	0
Net cash provided by (used in) financing activities	6,576	(4,133)
Effect of Exchange Rate on Cash and Cash Equivalents	(8)	(4)
Net increase (decrease) in cash and cash equivalents	409	(2,957)
Cash and cash equivalents at beginning of period	2,481	4,089
Cash and cash equivalents at end of period	2,890	1,132
Reconciliation of net income to net cash provided by operating activities:
Net income	3,740	3,323
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,510	1,442
Stock-based compensation	175	121
Gains (Losses) on Extinguishment of Debt	0	521
Deferred income taxes and other noncash items	(184)	(64)
Change in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, net	(2,530)	(1,872)
Inventories	(893)	(449)
Other current assets	591	(160)
Other assets	(13)	(19)
Accounts payable and claims and discounts payable	2,038	1,222
Accrued expenses	523	676
Other long-term liabilities	(116)	(27)
Net cash provided by operating activities	$ 4,841	$ 4,714