Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income	$ 2,201	$ 1,753
Adjustments to net income:
Depreciation	200	179
Amortization of acquisition-related intangibles	0	47
Amortization of capitalized software	14	15
Stock compensation	74	61
Gains on sales of assets	(2)	(1)
Deferred taxes	(1)	8
Increase (decrease) from changes in:
Accounts receivable	(94)	(170)
Inventories	(150)	65
Prepaid expenses and other current assets	21	73
Accounts payable and accrued expenses	11	69
Accrued compensation	(388)	(379)
Income taxes payable	284	131
Changes in funded status of retirement plans	21	28
Other	(47)	(29)
Cash flows from operating activities	2,144	1,850
Cash flows from investing activities
Capital expenditures	(443)	(308)
Proceeds from asset sales	2	1
Purchases of short-term investments	(3,988)	(2,782)
Proceeds from short-term investments	2,774	2,000
Other	(13)	(20)
Cash flows from investing activities	(1,668)	(1,109)
Cash flows from financing activities
Repayment of debt	0	(550)
Dividends paid	(1,063)	(940)
Stock repurchases	(589)	(100)
Proceeds from common stock transactions	57	196
Other	(7)	(12)
Cash flows from financing activities	(1,602)	(1,406)
Net change in cash and cash equivalents	(1,126)	(665)
Cash and cash equivalents at beginning of period	4,631	3,107
Cash and cash equivalents at end of period	$ 3,505	$ 2,442