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Leases (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Leases [Abstract]      
Rental expense attributed to operating leases $ 34.3 $ 38.1 $ 43.1
Future minimum rental obligations under non-cancelable operating leases      
2014 45.6    
2015 35.7    
2016 27.5    
2017 20.3    
2018 16.3    
Thereafter 26.1    
Total $ 171.5