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Software (Tables)
 12 Months Ended
Dec. 31, 2013
Research and Development [Abstract]  
Schedule of capitalized computer software
 
 
As of December 31,
 
 
2013
 
2012
Software
 
$
457.7

 
$
182.8

Accumulated amortization
 
(114.2
)
 
(95.6
)
Software, net
 
$
343.5

 
$
87.2