STOCK-BASED COMPENSATION (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Stock-based compensation
Stock-based compensation plans					2
Compensation expense on share-based plans	$ 7,200,000			$ 7,900,000	$ 21,600,000	$ 21,600,000
Excess tax benefit realized for tax deductions from non-qualified stock option exercises and disqualifying dispositions of incentive stock options	1,400,000			1,400,000	30,200,000	4,300,000
Stock options
Weighted-average assumptions used to estimate the fair value of options granted
Dividend yield (as a percent)	0.00%			0.00%	0.00%	0.00%
Expected volatility (as a percent)	0.00%			47.70%	47.90%	47.90%
Risk-free interest rate (as a percent)	0.00%			0.60%	0.90%	0.70%
Expected term	0 years			5 years 4 months 24 days	5 years 8 months 12 days	5 years 4 months 24 days
Stock Options, Number of Shares
Balance at the beginning of the period (in shares)			14,000		14,000
Granted (in shares)	0	450	636
Exercised (in shares)					(1,906)
Cancelled or forfeited (in shares)					(169)
Balance at the end of the period (in shares)	13,011				13,011		14,000
Vested and expected to vest in the future at the end of the period (in shares)	12,650				12,650
Exercisable at the end of the period (in shares)	10,033				10,033
Stock options, Weighted-Average Exercise Price Per Share
Balance at the beginning of the period (in dollars per share)			$ 12.12		$ 12.12
Granted (in dollars per share)		$ 54.00	$ 47.36
Exercised (in dollars per share)					$ 9.55
Cancelled or forfeited (in dollars per share)					$ 27.47
Balance at the end of the period (in dollars per share)	$ 15.47				$ 15.47		$ 12.12
Vested and expected to vest in the future at the end of the period (in dollars per share)	$ 14.66				$ 14.66
Exercisable at the end of the period (in dollars per share)	$ 9.05				$ 9.05
Weighted-Average Remaining Contractual Term
Balance at the beginning of the period					4 years		4 years 1 month 6 days
Balance at the end of the period					4 years		4 years 1 month 6 days
Vested and expected to vest in the future at the end of the period					3 years 9 months 18 days
Exercisable at the end of the period					2 years 9 months 18 days
Aggregate Intrinsic Value
Balance at the beginning of the period			572,530,000		572,530,000
Balance at the end of the period	482,058,000				482,058,000		572,530,000
Vested and expected to vest in the future at the end of the period	478,562,000				478,562,000
Exercisable at the end of the period	$ 433,715,000				$ 433,715,000