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Leases (Tables)
 12 Months Ended
Dec. 31, 2014
Leases [Abstract]  
Future minimum lease payments required under our leasing arrangements
Future minimum lease payments required under our operating leases at December 31, 2014 were approximately as follows:
 
 
2015
 
2016
 
2017
 
2018
 
2019
 
Thereafter
Future minimum lease payments
 
$
34.8

 
$
25.6

 
$
16.8

 
$
10.3

 
$
6.4

 
$
14.0