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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2013
Commitments and Contingencies (Tables) [Abstract]  
Future minimum payments for the next five years and thereafter for our operating lease contracts
Future minimum payments for the next five years and thereafter for our operating lease contracts are as follows:

 
(Millions of Dollars)
2014
$
3.9

2015
3.9

2016
3.7

2017
3.1

2018
3.2

Thereafter
22.7

Total
$
40.5