FAIR VALUE MEASUREMENTS (Details 2) (USD $)	12 Months Ended				12 Months Ended			12 Months Ended
	Dec. 31, 2013 Accounts receivable	Dec. 31, 2012 Accounts receivable	Dec. 31, 2012 Senior Credit Facility due 2017	Dec. 31, 2011 Senior Credit Facility due 2017	Dec. 31, 2013 Interest rate swaps from September 3, 2013 through July 1, 2018 Term Loan Facility	Dec. 12, 2011 Interest rate swap through December 12, 2011 Senior Credit Facility due 2017	Feb. 28, 2011 Interest rate swap Through February 28, 2011 Senior Credit Facility due 2017	Dec. 31, 2013 Hedges of cash flows Interest rate swaps Maximum	Dec. 31, 2013 Hedges of cash flows Interest rate swaps Financial charges and other	Dec. 31, 2012 Hedges of cash flows Interest rate swaps Financial charges and other	Dec. 31, 2011 Hedges of cash flows Interest rate swaps Financial charges and other	Dec. 31, 2012 Designated as hedge Interest rate swaps	Dec. 31, 2011 Designated as hedge Interest rate swaps	Dec. 31, 2013 Designated as hedge Interest rate swaps Maximum
Interest rate derivatives
Amount of variable-rate debt hedged			$ 0	$ 0	$ 150,000,000	$ 300,000,000	$ 75,000,000
Fixed interest rate paid (as a percent)						4.89%	3.86%
Date of maturity					Jul. 18, 2018
Weighted average fixed interest rate (as a percent)					2.79%
Fair value of derivatives, gross														1,000,000
Fair value of derivatives, net														1,000,000
Change in fair value of interest rate derivative instruments recognized in other comprehensive income								1,000,000
Net realized loss related to the interest rate swaps									1,000,000		14,000,000
Maximum counterparty credit exposure related to accounts receivable	$ 37,000,000	$ 59,000,000