Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 6,139	$ 6,466
Depreciation, amortization and other	1,504	1,456
Deferred income taxes	(172)	(294)
Other items, net	169	636
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(63)	(234)
Inventories	(101)	(93)
Other assets	(269)	(110)
Accounts payable	(196)	(311)
Accrued income taxes, net	(128)	(384)
Long-term tax liabilities	(262)	204
Other liabilities	15	766
Net cash provided by operating activities	6,636	8,102
Cash flows from investing activities:
Purchases of marketable securities	(9,062)	(12,617)
Proceeds from sales of marketable securities	3,019	28,059
Proceeds from maturities of marketable securities	18,441	3,881
Cash paid, net of cash acquired	(177)	197
Purchases of property, plant and equipment	(430)	(513)
Other	(119)	(31)
Net cash provided by investing activities	11,672	18,976
Cash flows from financing activities:
Repayment of debt	(4,514)	(500)
Repurchases of common stock	(6,608)	(15,670)
Dividends paid	(2,649)	(2,667)
Other	(67)	(85)
Net cash used in financing activities	(13,838)	(18,922)
Increase in cash and cash equivalents	4,470	8,156
Cash and cash equivalents at beginning of period	6,945	3,800
Cash and cash equivalents at end of period	$ 11,415	$ 11,956