Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 5,649	$ 6,139
Depreciation, amortization and other	2,728	1,504
Deferred income taxes	(339)	(172)
Other items, net	270	169
Changes in operating assets and liabilities, net of acquisition:
Trade receivables, net	(31)	(63)
Inventories	(316)	(101)
Other assets	64	(269)
Accounts payable	(202)	(196)
Accrued income taxes, net	(301)	(128)
Long-term tax liabilities	110	(262)
Other liabilities	712	15
Net cash provided by operating activities	8,344	6,636
Cash flows from investing activities:
Purchases of marketable securities	(5,329)	(9,062)
Proceeds from sales of marketable securities	2,597	3,019
Proceeds from maturities of marketable securities	2,338	18,441
Purchases of property, plant and equipment	(435)	(430)
Purchases of equity method investments	(3,154)	(14)
Other	(34)	(282)
Net cash (used in) provided by investing activities	(4,017)	11,672
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	8,914	0
Repayment of debt	(5,000)	(4,514)
Repurchases of common stock	(2,281)	(6,608)
Dividends paid	(2,823)	(2,649)
Other	(87)	(67)
Net cash used in financing activities	(1,277)	(13,838)
Increase in cash and cash equivalents	3,050	4,470
Cash and cash equivalents at beginning of period	6,037	6,945
Cash and cash equivalents at end of period	$ 9,087	$ 11,415