v2.4.0.6
Significant Accounting and Reporting Policies (Details Textual) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 8 Months Ended 12 Months Ended 4 Months Ended 12 Months Ended
Apr. 30, 2012
Dec. 31, 2012
Segment
Dec. 31, 2011
Dec. 31, 2012
Internal Use Software [Member]
Dec. 31, 2011
Internal Use Software [Member]
Dec. 31, 2010
Internal Use Software [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Internal Use Software [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Internal Use Software [Member]
Dec. 31, 2012
Building and Building Improvements [Member]
Dec. 31, 2012
Computer Equipment and Purchased Software [Member]
Maximum [Member]
Dec. 31, 2012
Computer Equipment and Purchased Software [Member]
Minimum [Member]
Dec. 31, 2012
Leasehold Improvements [Member]
Maximum [Member]
Dec. 31, 2012
Leasehold Improvements [Member]
Minimum [Member]
Apr. 30, 2012
Revolving Credit Facility [Member]
Apr. 30, 2012
9.625%/10.375% senior PIK toggle notes due 2018 [Member]
Dec. 31, 2012
TransUnion Corp-Successor [Member]
Dec. 31, 2012
TransUnion Corp-Successor [Member]
Segment
Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
Dec. 31, 2011
TransUnion Corp-Predecessor [Member]
Dec. 31, 2010
TransUnion Corp-Predecessor [Member]
Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
Apr. 30, 2012
TransUnion Holding Company, Inc. [Member]
Feb. 15, 2012
TransUnion Holding Company, Inc. [Member]
Apr. 30, 2012
TransUnion Holding Company, Inc. [Member]
9.625%/10.375% senior PIK toggle notes due 2018 [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]                                                    
Direct owned subsidiary                                             100.00%      
9.625% Notes                                               $ 600.0   $ 600.0
Senior notes, interest rate                                 9.625%                 10.375%
Increase in credit facility                               10.0                    
Credit facility, initial borrowing capacity                               200.0                    
Credit facility, revised borrowing capacity                               210.0                    
Outstanding Common Stock Acquired Percentage                                                 100.00%  
Cost of services included research and development costs                                   7.6   3.7 7.8 6.9        
Advertising costs                                   19.2   15.5 32.8 31.4        
Exchange rate gains (losses)                                   0.1   0.2 (2.8) (0.2)        
Expenses related to defined contribution profit sharing plan                                   6.9   4.8 10.1 10.5        
Property, Plant and Equipment [Line Items]                                                    
Estimated useful life of the asset                     20 years 7 years 3 years 7 years 5 years                      
Finite-Lived Intangible Assets [Line Items]                                                    
Estimated Useful Life             40 years 7 years 3 years 3 years                                
Impairment of Intangible Assets, Finite-lived       0 2.0 0                                        
Summary of Significant Accounting Policies (Additional Textual) [Abstract]                                                    
Line of credit facility tranche with extended maturity date 155.0                                                  
Line of credit remaining commitment expiration date Feb. 10, 2017                                                  
Ownership interest   20.00%                                                
Nonmarketable investments in TransUnion Corp   20.00%                                                
Internally developed software, net     $ 93.4                                              
Number of operating segments   3                                 3