Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 1,825	$ 1,992
Depreciation, amortization and other	897	495
Deferred income taxes	(84)	(50)
Other items, net	107	24
Changes in operating assets and liabilities, net of acquisition:
Trade receivables, net	(955)	(207)
Inventories	(113)	(28)
Other assets	319	(249)
Accounts payable	(25)	(112)
Accrued income taxes, net	137	277
Long-term tax liabilities	74	100
Other liabilities	(48)	(397)
Net cash provided by operating activities	2,134	1,845
Cash flows from investing activities:
Purchases of marketable securities	(129)	(6,898)
Proceeds from sales of marketable securities	2,574	125
Proceeds from maturities of marketable securities	113	10,455
Purchases of property, plant and equipment	(142)	(116)
Purchases of equity method investments	(2,645)	(5)
Other	(1)	(6)
Net cash (used in) provided by investing activities	(230)	3,555
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	4,963	0
Repayment of debt	(3,250)	(1,000)
Repurchases of common stock	(961)	(3,032)
Dividends paid	(945)	(901)
Other	(61)	(54)
Net cash used in financing activities	(254)	(4,987)
Increase in cash and cash equivalents	1,650	413
Cash and cash equivalents at beginning of period	6,037	6,945
Cash and cash equivalents at end of period	$ 7,687	$ 7,358