ADDITIONAL FINANCIAL INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Other Current Assets
Prepaid income taxes	$ 112		$ 112		$ 23
Other prepaid expenses	172		172		165
Other current assets	45		45		35
Total other current assets	329		329		223
Other Current Liabilities
Accrued interest	438		438		586
Accrued compensation and benefits	363		363		384
Accrued insurance	180		180		169
Accrued franchise fees	145		145		168
Accrued sales and other taxes	127		127		99
Other accrued expenses	383		383		399
Total other current liabilities	1,636		1,636		1,805
Revenue
Revenue	5,518	5,363	16,543	15,901
Interest Expense, Net
Interest expense	(379)	(404)	(1,178)	(1,210)
Interest income	0	2	3	6
Interest expense, net	(379)	(402)	(1,175)	(1,204)
Other Income, Net
Income from equity-method investments, net	2	438	16	445
Gain on sale of investment in Clearwire	0	64	0	64
Loss on equity award reimbursement obligation to Time Warner	(3)	(7)	(8)	(5)
Other investment losses	0	0	0	(12)
Other	1	1	2	1
Other income, net	0	496	10	493
TWC's share of the gain recognized on SpectrumCo's sale of spectrum licenses		430		430
Related Party Transactions
Revenue	2	3	6	8
Cost of revenue	(49)	(56)	(162)	(183)
Supplemental Cash Flow Information
Cash paid for interest			(1,425)	(1,433)
Interest income received			121	131
Cash paid for interest, net			(1,304)	(1,302)
Cash paid for income taxes			(472)	(300)
Cash refunds of income taxes			1	9
Cash paid for income taxes, net			(471)	(291)
Purchases of short-term investments in U.S. Treasury securities			(575)
Original maturity of short-term investments in U.S. Treasury securities			6 months
Proceeds from maturity of short-term investments in U.S. Treasury securities			475
Short-term investments in U.S. Treasury securities	250		250		150
Value of common stock repurchased and retired that settled in the next quarterly period			21	24
Residential Services [Member]
Revenue
Revenue	4,579	4,548	13,822	13,598
Business Services [Member]
Revenue
Revenue	594	493	1,696	1,386
Advertising [Member]
Revenue
Revenue	253	264	741	740
Other [Member]
Revenue
Revenue	$ 92	$ 58	$ 284	$ 177