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Change in Control Transactions (Details Textual) (USD $) | 1 Months Ended | 0 Months Ended | 12 Months Ended |  | 0 Months Ended |  | 0 Months Ended | 1 Months Ended | 10 Months Ended |  | 8 Months Ended | 12 Months Ended | 1 Months Ended | 2 Months Ended | 4 Months Ended | 12 Months Ended |
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Apr. 30, 2012 | Jun. 15, 2010 | Dec. 31, 2012 | Jun. 15, 2010 Seven Year Senior Secured Term Loan [Member] | Jun. 15, 2010 Five Year Senior Secured Term Loan [Member] | Jun. 15, 2010 Senior Secured Revolving Line of Credit [Member] | Jun. 15, 2010 11.625% notes [Member] | Jun. 15, 2010 Non Interest Bearing Loan [Member] | Jun. 15, 2010 Senior Secured Term Loan [Member] | Jun. 15, 2010 Pritzker [Member] | Nov. 30, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] | Apr. 30, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] Seven Year Senior Secured Term Loan [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] | Jun. 30, 2012 TransUnion Corp-Predecessor [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] | Apr. 30, 2012 Affiliates of Advent [Member] | Apr. 30, 2012 Affiliates of GSC [Member] | Apr. 30, 2012 Members of management [Member]
Change in Control Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior unsecured debt raised |  |  |  |  |  |  |  |  |  |  |  |  | $ 600,000,000 |  |  |  |  |  |  |  |  |  |
Percentage of share owned by shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49.50% | 49.50% | 1.00%
Acquisition-related costs |  |  | 36,500,000 |  |  |  |  |  |  |  |  | 15,200,000 |  | 400,000 |  | 20,900,000 |  | 20,900,000 |  |  |  |  |
Loan Fees incurred by Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,700,000 |  |  |  |  |
Ownership percent of entity |  | 0.85% |  |  |  |  |  |  |  | 48.15% |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes Issued Notes to investor |  | 1,626,700,000 |  | 950,000,000 | 15,000,000 |  | 645,000,000 | 16,700,000 |  |  |  |  |  |  | 950,000,000 |  |  |  |  |  |  |  |
Senior secured revolving line of credit |  |  |  |  |  | 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period |  |  |  |  |  | 5 years |  |  | 7 years |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |
Stock-based compensation expense |  | 20,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 | 300,000 |  |  |  |  |  |
Debt instrument, fee amount |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Control Transactions (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Merger Agreement, TransUnion Holding | Apr. 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate purchase price | 1,592,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, goodwill tax deductible |  |  | 128,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average useful life of identifiable intangible assets |  |  | 21 years 2 months 12 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding common stock acquired |  | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of bank debt |  | 487,500,000 |  |  |  |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |
(Provision) benefit for income taxes |  | $ 7,500,000 |  |  |  |  |  |  |  |  |  | $ (6,600,000) |  | $ (24,300,000) |  |  |  | $ 11,500,000 | $ (17,800,000) | $ (46,300,000) |  |  |

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