Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 1,476	$ 1,646
Depreciation, amortization and other	841	841
Deferred income taxes	(251)	(91)
Adjustments for equity method investments	(305)	85
Other items, net	240	164
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(195)	91
Inventories	(230)	(126)
Other assets	(43)	(146)
Accounts payable	42	(29)
Accrued income taxes, net	318	52
Long-term tax liabilities	57	69
Other liabilities	(396)	(282)
Net cash provided by operating activities	2,164	2,104
Cash flows from investing activities:
Purchases of marketable securities	0	(7,597)
Proceeds from sales of marketable securities	0	3,999
Proceeds from maturities of marketable securities	32	3,524
Purchases of property, plant and equipment	(190)	(166)
Other	47	(79)
Net cash used in investing activities	(111)	(319)
Cash flows from financing activities:
Net proceeds from issuance of debt	3,952	0
Repurchases of common stock (Note 10)	(6,360)	(871)
Dividends paid	(1,080)	(1,016)
Other	(26)	(52)
Net cash used in financing activities	(3,514)	(1,939)
Decrease in cash and cash equivalents	(1,461)	(154)
Cash and cash equivalents at beginning of period	7,989	6,266
Cash and cash equivalents at end of period	$ 6,528	$ 6,112