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 |  |  |  |
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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 |  |  |  |  |  |  |

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