DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $)	12 Months Ended			1 Months Ended										12 Months Ended				12 Months Ended	1 Months Ended	0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2013 4.150% Notes due July 1, 2023 item	Dec. 31, 2013 4.150% Notes due July 1, 2023	Dec. 31, 2012 4.625% Notes due July 15, 2013	Dec. 31, 2013 5.300% Notes due October 15, 2014	Dec. 31, 2012 5.300% Notes due October 15, 2014	Dec. 31, 2013 6.050% Notes	Dec. 31, 2012 6.050% Notes	Dec. 31, 2013 4.875% Notes	Dec. 31, 2012 4.875% Notes	Jan. 13, 2011 4.875% Notes	Dec. 31, 2013 Interest rate Swap	Dec. 31, 2012 Interest rate Swap	Dec. 31, 2013 Interest rate Swap 4.625% Notes due July 15, 2013 item	Dec. 31, 2013 Interest rate Swap 5.300% Notes due October 15, 2014 item	Dec. 31, 2013 Interest rate contracts and treasury lock agreements	Dec. 31, 2010 Treasury lock	Jan. 13, 2011 Treasury lock 4.875% Notes
Derivative Instruments And Hedging Activities
Number of forward-starting interest rate swaps				6												6	6
Derivative liability, notional amount													$ 650,000,000			$ 300,000,000	$ 275,000,000		$ 650,000,000
Debt instrument, stated percentage rate				4.15%	4.15%	4.625%	5.30%	5.30%	6.05%	6.05%	4.875%	4.875%	4.875%
Notes issued				500,000,000			275,000,000						650,000,000
Derivatives settled	62,009,000			62,000,000
Forward-starting interest rate swaps, unrealized gains (losses)	37,718,000	(28,726,000)	(104,809,000)											37,700,000	(28,700,000)
Term of treasury lock agreement																			10 years
Treasury rate (as a percent)																			3.3375%
Amount recognized in interest and debt expense				900,000																500,000
Interest rate swaps, expected net losses reclassified from accumulated other comprehensive loss to earnings over the next twelve months																		$ 7,100,000