Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 5,475	$ 3,093
Short-term investments	660	470
Accounts receivable, net of allowances of $654 and $641	11,814	12,576
Inventories	798	1,075
Prepaid expenses and other	6,511	4,021
Total current assets	25,258	21,235
Plant, property and equipment	212,082	209,575
Less accumulated depreciation	123,901	120,933
Plant, property and equipment, net	88,181	88,642
Investments in unconsolidated businesses	3,321	3,401
Wireless licenses	75,645	77,744
Goodwill	24,132	24,139
Other intangible assets, net	5,827	5,933
Other assets	3,822	4,128
Total assets	226,186	225,222
Current liabilities
Debt maturing within one year	10,888	4,369
Accounts payable and accrued liabilities	14,030	16,182
Other	6,571	6,405
Total current liabilities	31,489	26,956
Long-term debt	41,993	47,618
Employee benefit obligations	34,048	34,346
Deferred income taxes	24,993	24,677
Other liabilities	6,075	6,092
Equity
Series preferred stock ($.10 par value; none issued)
Common stock ($.10 par value; 2,967,610,119 shares issued in both periods)	297	297
Contributed capital	37,894	37,990
Reinvested earnings (Accumulated deficit)	(3,255)	(3,734)
Accumulated other comprehensive income	2,056	2,235
Common stock in treasury, at cost	(3,994)	(4,071)
Deferred compensation - employee stock ownership plans and other	312	440
Noncontrolling interest	54,278	52,376
Total equity	87,588	85,533
Total liabilities and equity	$ 226,186	$ 225,222