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Leases
 12 Months Ended
Dec. 31, 2014
Leases [Abstract]  
Leases
Leases
The company leases various property, plant and equipment.  Terms of the leases vary, but generally require the company to pay property taxes, insurance premiums, and maintenance costs associated with the leased property.  Rental expense attributed to operating leases was $34.8 million, $34.3 million and $38.1 million in 2014, 2013 and 2012, respectively. 
Future minimum rental obligations under non-cancelable operating leases, as of December 31, 2014, are payable as follows:
(in millions)
 
2015
$
42.4

2016
33.5

2017
23.3

2018
17.0

2019
14.9

Thereafter
23.3

Total
$
154.4