Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities
Net Income	$ 4,855	$ 3,906
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	4,118	4,028
Employee retirement benefits	295	375
Deferred income taxes	878	656
Provision for uncollectible accounts	260	278
Equity in earnings of unconsolidated businesses, net of dividends received	14	(89)
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses	(1,491)	(1,580)
Other, net	(1,398)	(1,617)
Net cash provided by operating activities	7,531	5,957
Cash Flows from Investing Activities
Capital expenditures (including capitalized software)	(3,602)	(3,565)
Acquisitions of investments and businesses, net of cash acquired	(21)	(140)
Acquisitions of wireless licenses, net	(117)	(25)
Net change in short-term investments	18	16
Other, net	123	41
Net cash used in investing activities	(3,599)	(3,673)
Cash Flows from Financing Activities
Proceeds from long-term borrowings	500
Repayments of long-term borrowings and capital lease obligations	(73)	(1,828)
Increase (decrease) in short-term obligations, excluding current maturities	581	(1,734)
Dividends paid	(1,472)	(1,291)
Proceeds from sale of common stock	56	69
Purchase of common stock for treasury	(153)
Special distribution to noncontrolling interest		(4,500)
Other, net	(989)	(453)
Net cash used in financing activities	(1,550)	(9,737)
Increase (decrease) in cash and cash equivalents	2,382	(7,453)
Cash and cash equivalents, beginning of period	3,093	13,362
Cash and cash equivalents, end of period	$ 5,475	$ 5,909