Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND OTHER INFORMATION (Details)

v2.4.0.8
BASIS OF PRESENTATION AND OTHER INFORMATION (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Accounting Policies [Abstract]    
Collected proceeds relating to the face value of the tickets sold on behalf of clients and the clients share of convenience and order processing charges $ 568.8 $ 538.4
2.875% Convertible Senior Notes Due 2027 [Member]
   
Debt Instrument [Line Items]    
Face amount 220  
Interest rate, stated percentage 2.875% 2.875%
Percentage of aggregate principal amount of notes if redeemed 100.00%  
Total debt including discount $ 215.9 $ 212.4