v3.7.0.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash Flows from Operating Activities    
Net income $ 8,031 $ 5,261
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization expense 8,226 7,999
Employee retirement benefits (223) 4,021
Deferred income taxes 1,880 (3,085)
Provision for uncollectible accounts 632 651
Equity in losses of unconsolidated businesses, net of dividends received 67 58
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses (3,094) (1,067)
Discretionary contributions to qualified pension plans (3,411)  
Net gain on sale of divested businesses (1,774) (1,007)
Other, net (416) 77
Net cash provided by operating activities 9,918 12,908
Cash Flows from Investing Activities    
Capital expenditures (including capitalized software) (7,011) (7,273)
Acquisitions of businesses, net of cash acquired (6,280) (178)
Acquisitions of wireless licenses (315) (282)
Proceeds from dispositions of businesses 3,512 9,882
Other, net 211 504
Net cash provided by (used in) investing activities (9,883) 2,653
Cash Flows from Financing Activities    
Proceeds from long-term borrowings 16,009  
Proceeds from asset-backed long-term borrowings 2,878  
Repayments of long-term borrowings and capital lease obligations (10,294) (11,300)
Increase (decrease) in short-term obligations, excluding current maturities (152) 610
Dividends paid (4,710) (4,605)
Other, net (2,063) (1,879)
Net cash provided by (used in) financing activities 1,668 (17,174)
Increase (decrease) in cash and cash equivalents 1,703 (1,613)
Cash and cash equivalents, beginning of period 2,880 4,470
Cash and cash equivalents, end of period $ 4,583 $ 2,857