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Leases and Commitments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Leases [Abstract]      
Total lease rent expense $ 31.9 $ 33.9 $ 32.1
Future minimum operating lease payments      
2016 31.7    
2017 16.4    
2018 11.1    
2019 8.2    
2020 7.2    
After 2020 2.0    
Total minimum lease payments $ 76.6