CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets
Cash and Cash Equivalents	$ 6,275	$ 6,351
Short-term investments	1,494	1,849
Accounts and notes receivable, net of allowance for doubtful accounts of $164 and $183	3,352	3,658
Device and accessory inventory	843	1,200
Prepaid expenses and other current assets	805	701
Total current assets	12,769	13,759
Investments	866	1,053
Property, Plant and Equipment, Net	14,025	13,607
Intangible assets
Goodwill	359	359
FCC licenses and other	20,722	20,677
Definite-lived intangible assets, net	1,271	1,335
Other assets	745	780
Total assets	50,757	51,570
Current Liabilities
Accounts payable	2,963	3,487
Accrued expenses and other current liabilities	5,176	5,008
Current portion of long-term debt, financing and capital lease obligations	428	379
Total current liabilities	8,567	8,874
Long-term debt, financing and capital lease obligations	24,072	23,962
Deferred tax liabilities	7,131	7,047
Other liabilities	4,513	4,600
Total liabilities	44,283	44,483
Commitments and contingencies
Shareholders' Equity
Common shares, voting, par value $2.00 per share, 6.5 billion shares authorized, 3.013 and 3.010 billion shares issued	6,026	6,019
Paid-in capital	47,026	47,016
Accumulated deficit	(45,459)	(44,815)
Accumulated other comprehensive loss	(1,119)	(1,133)
Total shareholders' equity	6,474	7,087
Total Liabilities and Shareholders' Equity	$ 50,757	$ 51,570