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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash Flows from Operating Activities    
Net Income $ 14,668 $ 15,050
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization expense 13,108 12,881
Employee retirement benefits 161 479
Deferred income taxes 822 1,595
Provision for expected credit losses 1,596 1,048
Equity in losses (earnings) of unconsolidated businesses, net of dividends received 69 (13)
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses 972 (458)
Other, net (2,598) (2,383)
Net cash provided by operating activities 28,798 28,199
Cash Flows from Investing Activities    
Capital expenditures (including capitalized software) (14,164) (15,811)
Cash received related to acquisitions of businesses, net 0 248
Acquisitions of wireless licenses (1,859) (2,890)
Collateral receipts (payments) related to derivative contracts, net 162 (4,857)
Proceeds from disposition of business 0 33
Other, net 253 (43)
Net cash used in investing activities (15,608) (23,320)
Cash Flows from Financing Activities    
Proceeds from long-term borrowings 1,999 4,605
Proceeds from asset-backed long-term borrowings 4,656 5,939
Net proceeds from short-term commercial paper 333 4,514
Repayments of long-term borrowings and finance lease obligations (5,568) (8,001)
Repayments of asset-backed long-term borrowings (3,729) (3,647)
Dividends paid (8,231) (8,066)
Other, net (1,101) (797)
Net cash used in financing activities (11,641) (5,453)
Increase (decrease) in cash, cash equivalents and restricted cash 1,549 (574)
Cash, cash equivalents and restricted cash, beginning of period 4,111 4,161
Cash, cash equivalents and restricted cash, end of period $ 5,660 $ 3,587