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Components Of Properties (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Total properties $ 876.6 $ 1,059.4
Land    
Property, Plant and Equipment [Line Items]    
Total properties 2.8 2.8
Building    
Property, Plant and Equipment [Line Items]    
Total properties 93.1 80.1
Machinery and Office Equipment    
Property, Plant and Equipment [Line Items]    
Total properties 586.8 644.9
Internal-Use Software    
Property, Plant and Equipment [Line Items]    
Total properties 144.5 257.7
Rental Equipment    
Property, Plant and Equipment [Line Items]    
Total properties $ 49.4 $ 73.9