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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Activities      
Net income including noncontrolling interests $ 2,860 $ 2,527 $ 2,558
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operations:      
Depreciation and amortization 539 519 511
Restructuring and termination benefits, net of cash (71) 18 (7)
Stock-based compensation expense 107 100 109
Loss on early extinguishment of debt 23 0 0
Charge for U.S. tax reform 0 0 80
Deferred income taxes (120) 17 27
Voluntary benefit plan contributions 0 (113) (67)
Cash effects of changes in:      
Receivables 138 19 (79)
Inventories (251) (77) (58)
Accounts payable and other accruals 520 36 18
Other non-current assets and liabilities (26) 87 (36)
Net cash provided by operations 3,719 3,133 3,056
Investing Activities      
Capital expenditures (410) (335) (436)
Purchases of marketable securities and investments (143) (184) (169)
Proceeds from sale of marketable securities and investments 124 131 156
Payment for acquisitions, net of cash acquired (353) (1,711) (728)
Other 3 0 7
Net cash used in investing activities (779) (2,099) (1,170)
Financing Activities      
Short-term borrowing/(repayment) less than 90 days - net 497 294 546
Principal payments on debt [1] (1,061) (1,441) (725)
Proceeds from issuance of debt 0 2,595 0
Dividends paid (1,654) (1,614) (1,591)
Purchases of treasury shares (1,476) (1,202) (1,238)
Proceeds from exercise of stock options 874 498 329
Purchases of non-controlling interests in subsidiaries (99) 0 0
Net cash used in financing activities (2,919) (870) (2,679)
Effect of exchange rate changes on Cash and cash equivalents (16) (7) (16)
Net (decrease) increase in Cash and cash equivalents 5 157 (809)
Cash and cash equivalents at beginning of year 883 726 1,535
Cash and cash equivalents at end of year 888 883 726
Supplemental Cash Flow Information      
Income taxes paid 845 803 847
Interest paid $ 188 $ 185 $ 194
[1] (1) For the year ended December 31, 2020, Principal payments on debt includes cash charges of $20 related to the extinguishment of debt prior to maturity. See Note 6, Long-Term Debt and Credit Facilities for additional information.