Operating Costs and Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Income and Expenses [Abstract]
Programming	$ 621	$ 554	$ 1,834	$ 1,585
Franchise, regulatory and connectivity	105	104	319	296
Cost to service customers	429	412	1,250	1,164
Marketing	136	131	404	359
Other	227	196	637	546
Operating costs and expenses (excluding depreciation and amortization)	$ 1,518	$ 1,397	$ 4,444	$ 3,950