Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net Income	$ 2,938	$ 2,225	$ 2,022
Loss from discontinued operations	0	3	3
Income from continuing operations	2,938	2,228	2,025
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,267	2,033	1,758
Change in deferred income taxes	(379)	(1,098)	(620)
Non-cash stock-based compensation	181	159	133
Other non-cash expenses, net	106	190	142
Changes in assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(366)	(362)	(352)
Inventories	(324)	(81)	98
Other assets	54	(153)	(153)
Accounts payable	201	274	56
Other liabilities	(42)	1,016	216
Contributions to retirement plans	(93)	(200)	(43)
Net cash provided by continuing operations	4,543	4,006	3,260
Net cash used in discontinued operations	0	(1)	(2)
Net cash provided by operating activities	4,543	4,005	3,258
Investing Activities
Acquisitions, net of cash acquired	(536)	(7,226)	(5,178)
Purchase of property, plant and equipment	(758)	(508)	(444)
Proceeds from sale of property, plant and equipment	50	7	26
Other investing activities, net	(9)	(2)	76
Net cash used in investing activities	(1,253)	(7,729)	(5,520)
Financing Activities
Net proceeds from issuance of debt	690	6,459	7,604
Repayment of debt	(2,052)	(3,299)	(4,334)
Proceeds from issuance of commercial paper	5,060	8,380	9,182
Repayments of commercial paper	(5,254)	(8,514)	(8,278)
Purchases of company common stock	(500)	(750)	(1,250)
Dividends paid	(266)	(237)	(238)
Net proceeds from issuance of company common stock	0	1,690	0
Net proceeds from issuance of company common stock under employee stock plans	136	128	87
Other financing activities	(51)	(3)	(14)
Net cash (used in) provided by financing activities	(2,237)	3,854	2,759
Exchange Rate Effect on Cash	(297)	420	(152)
Increase in Cash, Cash Equivalents and Restricted Cash	756	550	345
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	1,361	811	466
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 2,117	$ 1,361	$ 811