Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 1,105	$ 1,708
Adjustments to net income:
Depreciation	346	265
Amortization of capitalized software	16	16
Stock compensation	106	104
Gains on sales of assets	(129)	0
Deferred taxes	(71)	(8)
Increase (decrease) from changes in:
Accounts receivable	116	18
Inventories	(84)	(531)
Prepaid expenses and other current assets	(24)	(4)
Accounts payable and accrued expenses	(77)	(124)
Accrued compensation	(444)	(407)
Income taxes payable	212	185
Changes in funded status of retirement plans	17	6
Other	(72)	(68)
Cash flows from operating activities	1,017	1,160
Cash flows from investing activities
Capital expenditures	(1,248)	(982)
Proceeds from asset sales	192	1
Purchases of short-term investments	(4,864)	(3,013)
Proceeds from short-term investments	2,631	4,026
Other	(40)	(4)
Cash flows from investing activities	(3,329)	28
Cash flows from financing activities
Proceeds from issuance of long-term debt	2,980	1,397
Dividends paid	(1,183)	(1,125)
Stock repurchases	(3)	(103)
Proceeds from common stock transactions	65	85
Other	(28)	(15)
Cash flows from financing activities	1,831	239
Net change in cash and cash equivalents	(481)	1,427
Cash and cash equivalents at beginning of period	2,964	3,050
Cash and cash equivalents at end of period	$ 2,483	$ 4,477