Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income		$ 7,769	$ 5,595	$ 5,017
Adjustments to net income:
Depreciation		755	733	708
Amortization of acquisition-related intangibles		142	198	288
Amortization of capitalized software		57	61	54
Stock compensation		230	224	217
Gains on sales of assets		(57)	(4)	(23)
Deferred taxes		15	(137)	81
Increase (decrease) from changes in:
Accounts receivable		(287)	(340)	133
Inventories		45	46	216
Prepaid expenses and other current assets		57	(79)	265
Accounts payable and accrued expenses		33	63	(93)
Accrued compensation		7	63	(15)
Income taxes payable		(20)	(181)	(193)
Changes in funded status of retirement plans		62	(9)	29
Other		(52)	(94)	(35)
Cash flows from operating activities		8,756	6,139	6,649
Cash flows from investing activities
Capital expenditures		(2,462)	(649)	(847)
Proceeds from asset sales		75	4	30
Purchases of short-term investments		(10,124)	(5,786)	(3,444)
Proceeds from short-term investments		8,478	5,545	2,309
Other		(62)	(36)	32
Cash flows from investing activities		(4,095)	(922)	(1,920)
Cash flows from financing activities
Proceeds from issuance of long-term debt		1,495	1,498	1,491
Repayment of debt		(550)	(500)	(750)
Dividends paid		(3,886)	(3,426)	(3,008)
Stock repurchases		(527)	(2,553)	(2,960)
Proceeds from common stock transactions	[1]	377	470	539
Other		(46)	(36)	(42)
Cash flows from financing activities		(3,137)	(4,547)	(4,730)
Net change in cash and cash equivalents		1,524	670	(1)
Cash and cash equivalents at beginning of period		3,107	2,437	2,438
Cash and cash equivalents at end of period		$ 4,631	$ 3,107	$ 2,437

[1] Net of taxes paid for employee shares withheld of $53 million, $53 million and $52 million in 2021, 2020 and 2019, respectively.