CREDIT FACILITIES AND LONG-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified						12 Months Ended							0 Months Ended		0 Months Ended	12 Months Ended	0 Months Ended																		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2013 Senior Credit Facility due 2017	Dec. 31, 2012 Senior Credit Facility due 2017	Dec. 31, 2013 Senior Credit Facility due 2017 Maximum	Dec. 31, 2013 Senior Credit Facility due 2017 LIBOR	Dec. 31, 2012 Senior Credit Facility due 2017 LIBOR	Dec. 31, 2011 Senior Credit Facility due 2017 LIBOR	Dec. 31, 2013 Senior revolving credit facility	Jul. 02, 2013 Senior revolving credit facility	Dec. 31, 2012 Senior revolving credit facility	Jul. 02, 2013 Term Loan Facility due 2018	Dec. 31, 2013 Term Loan Facility due 2018	Jul. 02, 2013 Term Loan Facility due 2018 LIBOR borrowings LIBOR	Dec. 31, 2013 Term Loan Facility due 2018 LIBOR borrowings LIBOR	Jul. 02, 2013 Term Loan Facility due 2018 LIBOR borrowings LIBOR Minimum	Jul. 02, 2013 Term Loan Facility due 2018 LIBOR borrowings LIBOR Maximum	Jul. 02, 2013 Term Loan Facility due 2018 Base rate borrowings LIBOR	Jul. 02, 2013 Term Loan Facility due 2018 Base rate borrowings Base rate	Jul. 02, 2013 Term Loan Facility due 2018 Base rate borrowings Base rate Minimum	Jul. 02, 2013 Term Loan Facility due 2018 Base rate borrowings Base rate Maximum	Jul. 02, 2013 Term Loan Facility due 2018 Base rate borrowings Prime rate	Jul. 02, 2013 Term Loan Facility due 2018 Base rate borrowings Federal funds rate	Dec. 31, 2013 4.65% Unsecured Senior Notes due 2021	Dec. 31, 2012 4.65% Unsecured Senior Notes due 2021	Dec. 31, 2013 5.09% Unsecured Senior Notes due 2015	Dec. 31, 2012 5.09% Unsecured Senior Notes due 2015	Dec. 31, 2013 5.29% Unsecured Senior Notes due 2020	Dec. 31, 2012 5.29% Unsecured Senior Notes due 2020	Dec. 31, 2013 5.69% Unsecured Senior Notes due 2035	Dec. 31, 2012 5.69% Unsecured Senior Notes due 2035	Dec. 31, 2013 3.82% Series D Senior Notes due 2017	Dec. 31, 2012 3.82% Series D Senior Notes due 2017	Dec. 31, 2013 GTN Senior Notes Maximum
Credit facilities and long-term debt
Stated interest rate (as a percent)																									4.65%	4.65%	5.09%	5.09%	5.29%	5.29%	5.69%	5.69%	3.82%	3.82%
Total long-term debt	$ 1,578	$ 1,013		$ 380	$ 312									$ 500											$ 349	$ 349	$ 75	$ 75	$ 100	$ 100	$ 150	$ 150	$ 24	$ 27
Less: current portion of long-term debt	3	3	[1]
Long-term debt	1,575	1,010	[1]
Maximum borrowing capacity										500	500		500
Borrowings under the facility													500
Amount outstanding under credit facility										380		312
Remaining borrowing capacity										120
Variable rate basis							LIBOR	LIBOR							LIBOR				one-month LIBOR	Lender prime rate, federal funds rate or one-month LIBOR			Prime rate	Federal funds rate
Basis spread on variable rate (as a percent)																	1.125%	2.00%	1.00%		0.125%	1.00%		0.50%
Option to increase borrowings on the credit facility						$ 250
Debt average interest rate (as a percent)							1.44%	1.61%	0.86%							1.43%
Debt average interest rate, after hedging activity (as a percent)									4.07%							1.70%
Debt interest rate, at period end, prior to hedging activities (as a percent)							1.42%	1.47%								1.42%
Percentage of debt to total capitalization																																			70.00%

[1] (a) Recast as discussed in Note 2 and Note 6.