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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies [Line Items]  
Future Minimum Rental Payments for Operating Leases
The following table sets forth our operating lease payments for the periods indicated:
Operating Leases
(Millions of dollars)
2015
 
$
4.7

2016
 
4.5

2017
 
4.3

2018
 
4.0

2019
 
3.4

Thereafter
 
10.4

Total
 
$
31.3