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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities:    
Net income $ 5,950 $ 4,936
Depreciation, amortization and other 2,691 2,506
Deferred income taxes (650) (847)
Adjustments for equity method investments (17) 713
Loss on divestiture 0 565
(Gains) losses on equity securities (1,304) 113
Other items, net 849 123
Changes in operating assets and liabilities, net of acquisitions:    
Trade receivables, net (582) (566)
Inventories (82) (651)
Other assets (332) 166
Accounts payable (215) (142)
Accrued income taxes, net 998 (492)
Long-term tax liabilities 293 185
Other liabilities 334 463
Net cash provided by operating activities 7,933 7,072
Cash flows from investing activities:    
Purchases of marketable securities (1) (2,363)
Proceeds from sales of marketable securities 1,125 0
Proceeds from maturities of marketable securities 550 447
Purchases of property, plant and equipment (863) (596)
Other 74 (59)
Net cash provided by (used in) investing activities 885 (2,571)
Cash flows from financing activities:    
Net proceeds from issuance of debt 23,781 6,938
Extinguishment of debt (550) (297)
Repayment of debt (1,454) 0
Repurchases of common stock 0 (6,360)
Dividends paid (3,416) (3,156)
Other (67) (113)
Net cash provided by (used in) financing activities 18,294 (2,988)
Increase in cash and cash equivalents 27,112 1,513
Cash and cash equivalents at beginning of period 7,629 7,989
Cash and cash equivalents at end of period $ 34,741 $ 9,502