Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities
Net Income	$ 8,912	$ 8,031
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	8,674	8,226
Employee retirement benefits	(300)	(223)
Deferred income taxes	1,354	1,880
Provision for uncollectible accounts	462	632
Equity in losses of unconsolidated businesses, net of dividends received	268	67
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses	(1,538)	(3,721)
Discretionary employee benefits contributions	(1,679)	(3,411)
Net gain on sale of divested businesses	0	(1,774)
Other, net	280	(401)
Net cash provided by operating activities	16,433	9,306
Cash Flows from Investing Activities
Capital expenditures (including capitalized software)	(7,838)	(7,011)
Acquisitions of businesses, net of cash acquired	(38)	(6,231)
Acquisitions of wireless licenses	(1,155)	(315)
Proceeds from dispositions of businesses	0	3,512
Other, net	303	786
Net cash used in investing activities	(8,728)	(9,259)
Cash Flows from Financing Activities
Proceeds from long-term borrowings	4,584	16,009
Proceeds from asset-backed long-term borrowings	1,716	2,878
Repayments of long-term borrowings and capital lease obligations	(6,568)	(10,294)
Repayments of asset-backed long-term borrowings	(2,000)	0
Decrease in short-term obligations, excluding current maturities	(210)	(152)
Dividends paid	(4,845)	(4,710)
Other, net	(542)	(1,831)
Net cash provided by (used in) financing activities	(7,865)	1,900
Increase (decrease) in cash, cash equivalents and restricted cash	(160)	1,947
Cash, cash equivalents and restricted cash, beginning of period	2,888	3,177
Cash, cash equivalents and restricted cash, end of period (Note 1)	$ 2,728	$ 5,124