Description Of Business And Basis Of Presentation (Narrative) (Details) (USD $)	12 Months Ended							12 Months Ended					12 Months Ended
	Dec. 31, 2012 network segment	Dec. 31, 2011	Dec. 31, 2010	Jun. 16, 2011	Jun. 30, 2011 Distribution Debt [Member]	Jun. 30, 2011 Credit Facility [Member]	Jun. 30, 2011 7.75% Senior Notes [Member]	Dec. 31, 2011 Pre-Distribution Debt [Member]	Dec. 31, 2010 Class A [Member]	Dec. 31, 2012 Class A [Member]	Dec. 31, 2011 Class A [Member]	Jun. 16, 2011 Class A [Member]	Dec. 31, 2010 Class B [Member]	Dec. 31, 2012 Class B [Member]	Dec. 31, 2011 Class B [Member]	Jun. 16, 2011 Class B [Member]	Dec. 31, 2011 Balance Sheet Reclassification Of Prepaid Program Rights [Member]	Dec. 31, 2011 Cash Flow Reclassification Of Prepaid Program Rights [Member]	Dec. 31, 2010 Cash Flow Reclassification Of Prepaid Program Rights [Member]
Number of Reportable Segments	2
Nationally Distributed Programming Networks	4
Number Of Shares Received In New Company From Distribution				1								1				1
Number Of Prior Company Shares Held To Receive One Share In New Company, From Distribution				4								4				4
Common Stock, Shares, Issued										61,247,043	58,628,764	57,813,000		11,784,408	13,534,408	13,534,000
Debt Instrument, Face Amount					$ 2,425,000,000	$ 1,725,000,000	$ 700,000,000
Debt Instrument, Decrease, Repayments								1,063,000,000
Deemed Capital Distribution Associated With The Issuance Of Debt To Related Party	0	1,250,000,000	0
Balance Sheet Reclassification of the Prepaid Portion of Program Rights	289,644,000	288,868,000															53,697,000
Program Rights Obligations Current	157,584,000	146,339,000																27,491,000	13,426,000
Distribution Of Net Assets To Related Party			41,273,000						0				0
No Gain or Loss in A Distribution Between Two Entities With Common Control			$ 0