Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 1,174	$ 1,217
Adjustments to net income:
Depreciation	186	166
Amortization of acquisition-related intangibles	50	79
Amortization of capitalized software	14	13
Stock compensation	63	61
Gains on sales of assets	0	(2)
Deferred taxes	(34)	4
Increase (decrease) from changes in:
Accounts receivable	(242)	(233)
Inventories	(2)	86
Prepaid expenses and other current assets	(88)	223
Accounts payable and accrued expenses	0	(67)
Accrued compensation	(353)	(373)
Income taxes payable	147	(94)
Changes in funded status of retirement plans	27	7
Other	(91)	20
Cash flows from operating activities	851	1,107
Cash flows from investing activities
Capital expenditures	(161)	(251)
Proceeds from asset sales	0	2
Purchases of short-term investments	(646)	(149)
Proceeds from short-term investments	1,638	1,584
Other	(5)	(13)
Cash flows from investing activities	826	1,173
Cash flows from financing activities
Proceeds from issuance of long-term debt	749	743
Dividends paid	(841)	(724)
Stock repurchases	(1,641)	(1,152)
Proceeds from common stock transactions	146	151
Other	(9)	(16)
Cash flows from financing activities	(1,596)	(998)
Net change in cash and cash equivalents	81	1,282
Cash and cash equivalents at beginning of period	2,437	2,438
Cash and cash equivalents at end of period	$ 2,518	$ 3,720