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Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income	$ 1,753	$ 1,174
Adjustments to net income:
Depreciation	179	186
Amortization of acquisition-related intangibles	47	50
Amortization of capitalized software	15	14
Stock compensation	61	63
Gains on sales of assets	(1)	0
Deferred taxes	8	(34)
Increase (decrease) from changes in:
Accounts receivable	(170)	(242)
Inventories	65	(2)
Prepaid expenses and other current assets	73	(88)
Accounts payable and accrued expenses	69	0
Accrued compensation	(379)	(353)
Income taxes payable	131	147
Changes in funded status of retirement plans	28	27
Other	(29)	(91)
Cash flows from operating activities	1,850	851
Cash flows from investing activities
Capital expenditures	(308)	(161)
Proceeds from asset sales	1	0
Purchases of short-term investments	(2,782)	(646)
Proceeds from short-term investments	2,000	1,638
Other	(20)	(5)
Cash flows from investing activities	(1,109)	826
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	749
Repayment of debt	(550)	0
Dividends paid	(940)	(841)
Stock repurchases	(100)	(1,641)
Proceeds from common stock transactions	196	146
Other	(12)	(9)
Cash flows from financing activities	(1,406)	(1,596)
Net change in cash and cash equivalents	(665)	81
Cash and cash equivalents at beginning of period	3,107	2,437
Cash and cash equivalents at end of period	$ 2,442	$ 2,518

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