Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net Income	$ 4,287	$ 5,160
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	4,150	4,231
Employee retirement benefits	(1)	(195)
Deferred income taxes	(87)	459
Provision for uncollectible accounts	553	319
Equity in losses of unconsolidated businesses, net of dividends received	26	21
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses	(1,208)	(2,702)
Discretionary employee benefits contributions	0	(300)
Other, net	1,104	88
Net cash provided by operating activities	8,824	7,081
Cash Flows from Investing Activities
Capital expenditures (including capitalized software)	(5,274)	(4,268)
Acquisitions of businesses, net of cash acquired	0	(25)
Acquisitions of wireless licenses	(210)	(104)
Other, net	(1,496)	(406)
Net cash used in investing activities	(6,980)	(4,803)
Cash Flows from Financing Activities
Proceeds from long-term borrowings	5,848	2,131
Proceeds from asset-backed long-term borrowings	2,844	1,117
Repayments of long-term borrowings and finance lease obligations	(1,700)	(2,963)
Repayments of asset-backed long-term borrowings	(2,229)	(813)
Dividends paid	(2,547)	(2,489)
Other, net	347	360
Net cash provided by (used in) financing activities	2,563	(2,657)
Increase (decrease) in cash, cash equivalents and restricted cash	4,407	(379)
Cash, cash equivalents and restricted cash, beginning of period	3,917	3,916
Cash, Cash equivalents and restricted cash, end of period (Note 1)	$ 8,324	$ 3,537