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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash Flows from Operating Activities    
Net income $ 3,507 $ 2,339
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 2,355 3,111
Intangible asset impairment charges 131 567
Deferred income taxes (272) (120)
Share-based compensation 156 148
Other 63 166
Net changes in assets and liabilities (2,337) (2,438)
Net Cash Provided by Operating Activities 3,603 3,773
Cash Flows from Investing Activities    
Capital expenditures (732) (654)
Purchases of securities and other investments (6,280) (6,355)
Proceeds from sales of securities and other investments 9,363 7,388
Acquisitions of businesses, net of cash acquired (347) (157)
Other 62 21
Net Cash Provided by Investing Activities 2,066 243
Cash Flows from Financing Activities    
Net change in short-term borrowings (24) (9)
Payments on debt (301) (2,351)
Purchases of treasury stock (2,153) (1,573)
Dividends paid to stockholders (2,601) (2,579)
Proceeds from exercise of stock options 408 381
Other (86) (101)
Net Cash Used in Financing Activities (4,757) (6,232)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 359 300
Net Increase (Decrease) in Cash and Cash Equivalents 1,271 (1,916)
Cash and Cash Equivalents at Beginning of Year 6,515 8,524
Cash and Cash Equivalents at End of Period $ 7,786 $ 6,608