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STOCK-BASED COMPENSATION (Details 2) (Stock options, USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock options
            
Stock-based compensation            
Excess tax benefit realized for tax deductions from non-qualified stock option exercises and disqualifying dispositions of incentive stock options       $ 30,300,000 $ 19,700,000 $ 3,800,000
Weighted-average assumptions used to estimate the fair value of options granted            
Dividend yield (as a percent)       0.00% 0.00% 0.00%
Expected volatility (as a percent)       47.50% 48.10% 53.60%
Risk-free interest rate (as a percent)       0.98% 0.74% 1.50%
Expected term       5 years 8 months 12 days 5 years 4 months 24 days 5 years 9 months 18 days
Stock Options, Number of Shares            
Balance at the beginning of the period (in shares)     14,000,000 14,000,000    
Granted (in shares) 106,000 450,000 636,000      
Exercised (in shares)       (2,022,000)    
Cancelled or forfeited (in shares)       (197,000)    
Balance at the end of the period (in shares) 12,973,000     12,973,000 14,000,000  
Vested and expected to vest in the future at the end of the period (in shares) 12,639,000     12,639,000    
Exercisable at the end of the period (in shares) 10,401,000     10,401,000    
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) $ 57.76 $ 54.00 $ 47.36      
Exercised (in dollars per share)       $ 10.51    
Cancelled or forfeited (in dollars per share)       $ 27.28    
Balance at the end of the period (in dollars per share) $ 15.70     $ 15.70 $ 12.12  
Vested and expected to vest in the future at the end of the period (in dollars per share) $ 14.89     $ 14.89    
Exercisable at the end of the period (in dollars per share) $ 9.38     $ 9.38    
Weighted-Average Remaining Contractual Term            
Balance at the beginning of the period       3 years 8 months 12 days 4 years 1 month 6 days  
Balance at the end of the period       3 years 8 months 12 days 4 years 1 month 6 days  
Vested and expected to vest in the future at the end of the period       3 years 7 months 6 days    
Exercisable at the end of the period       2 years 8 months 12 days    
Aggregate Intrinsic Value            
Balance at the beginning of the period     572,530,000 572,530,000    
Balance at the end of the period 675,595,000     675,595,000 572,530,000  
Vested and expected to vest in the future at the end of the period 668,379,000     668,379,000    
Exercisable at the end of the period $ 607,302,000     $ 607,302,000