Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities
Net Income	$ 13,974	$ 11,767
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	13,051	12,498
Employee retirement benefits	(886)	(334)
Deferred income taxes	2,023	2,577
Provision for uncollectible accounts	699	842
Equity in losses of unconsolidated businesses, net of dividends received	291	100
Net gain on sale of divested businesses	0	(1,774)
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses	(1,944)	(6,257)
Discretionary employee benefits contributions	(1,679)	(3,411)
Other, net	715	467
Net cash provided by operating activities	26,244	16,475
Cash Flows from Investing Activities
Capital expenditures (including capitalized software)	(12,026)	(11,282)
Acquisitions of businesses, net of cash acquired	(39)	(6,247)
Acquisitions of wireless licenses	(1,307)	(469)
Proceeds from dispositions of businesses	0	3,614
Other, net	236	1,397
Net cash used in investing activities	(13,136)	(12,987)
Cash Flows from Financing Activities
Proceeds from long-term borrowings	5,932	21,915
Proceeds from asset-backed long-term borrowings	3,216	2,878
Repayments of long-term borrowings and capital lease obligations	(9,776)	(16,457)
Repayments of asset-backed long-term borrowings	(2,915)	0
Dividends paid	(7,283)	(7,067)
Other, net	(1,595)	(2,866)
Net cash used in financing activities	(12,421)	(1,597)
Increase in cash, cash equivalents and restricted cash	687	1,891
Cash, cash equivalents and restricted cash, beginning of period	2,888	3,177
Cash, cash equivalents and restricted cash, end of period (Note 1)	$ 3,575	$ 5,068