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Change in Control Transactions (Details Textual) (USD $)
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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
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Jun. 15, 2010
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Dec. 31, 2012
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Jun. 15, 2010
Seven Year Senior Secured Term Loan [Member]
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Jun. 15, 2010
Five Year Senior Secured Term Loan [Member]
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Jun. 15, 2010
Senior Secured Revolving Line of Credit [Member]
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Jun. 15, 2010
11.625% notes [Member]
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Jun. 15, 2010
Non Interest Bearing Loan [Member]
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Jun. 15, 2010
Senior Secured Term Loan [Member]
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Jun. 15, 2010
Pritzker [Member]
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Nov. 30, 2012
TransUnion Holding Company, Inc. [Member]
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Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
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Apr. 30, 2012
TransUnion Holding Company, Inc. [Member]
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Dec. 31, 2012
TransUnion Corp-Successor [Member]
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Dec. 31, 2012
TransUnion Corp-Successor [Member]
Seven Year Senior Secured Term Loan [Member]
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Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
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Jun. 30, 2012
TransUnion Corp-Predecessor [Member]
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Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
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Dec. 31, 2011
TransUnion Corp-Predecessor [Member]
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Dec. 31, 2010
TransUnion Corp-Predecessor [Member]
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Apr. 30, 2012
Affiliates of Advent [Member]
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Apr. 30, 2012
Affiliates of GSC [Member]
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Apr. 30, 2012
Members of management [Member]
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| 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) | |||||||||||||||||