v2.4.0.6
Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Millions, unless otherwise specified
4 Months Ended 8 Months Ended 12 Months Ended
Apr. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
TransUnion Corp-Successor [Member]
       
Component accumulated other comprehensive income (loss)        
Foreign currency translation adjustment balance   $ (20.7)    
Foreign currency translation adjustment   (22.7)    
Net unrealized gain/(loss) on hedges change   (3.7)    
Accumulated other comprehensive income / (loss) hedge changes   (3.7)    
Other comprehensive income (loss)   (26.4)    
Accumulated other comprehensive income (loss), total   (24.4)    
TransUnion Corp-Predecessor [Member]
       
Component accumulated other comprehensive income (loss)        
Foreign currency translation adjustment balance (1.4)   (3.6) 9.3
Foreign currency translation adjustment 2.5   (14.5) 9.4
Foreign currency translation adjustment purchase accounting adjustments   1.4    
Net unrealized gain/(loss) on hedges change           
Accumulated other comprehensive income / (loss) hedge changes         (1.1)
Other comprehensive income (loss) 2.5   (14.5) 8.3
Other comprehensive income (loss) purchase accounting adjustment   1.4    
Accumulated other comprehensive income (loss), total $ (1.4)   $ (3.6) $ 9.3