v2.4.0.6

Stock Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended | 8 Months Ended | 12 Months Ended | 8 Months Ended | 10 Months Ended | 12 Months Ended | 8 Months Ended | 3 Months Ended | 8 Months Ended |  |  | 8 Months Ended |  | 8 Months Ended | 3 Months Ended | 8 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 4 Months Ended | 12 Months Ended | 3 Months Ended | 4 Months Ended | 12 Months Ended
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Dec. 31, 2010 | Dec. 31, 2012 Restricted Stock [Member] | Dec. 31, 2012 Restricted Stock [Member] | Dec. 31, 2011 Restricted Stock [Member] | Dec. 31, 2010 Restricted Stock [Member] | Dec. 31, 2012 Maximum [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2010 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] Service Condition Option [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] Market Condition Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] | Oct. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Service Condition Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Appreciation Rights [Member] | Nov. 09, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Appreciation Rights [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Appreciation Rights [Member] Service Condition Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Nov. 09, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] Service Condition Option [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member] Market Condition Option [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] | Dec. 31, 2009 TransUnion Corp-Predecessor [Member] | Dec. 31, 2012 TransUnion Corp-Predecessor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] TransUnion Holding Company, Inc. [Member] Stock Option [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] TransUnion Corp [Member]
Stock Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  | $ 3.0 |  |  |  |  | $ 2.6 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 90.0 | $ 4.6 | $ 31.8 |  |  |  |  |  | $ 20.7
Income tax benefit | 7.5 |  |  |  |  |  |  | 1.1 |  |  |  |  | 0.9 |  |  |  |  |  |  |  |  |  |  |  |  |  | 32.4 | 1.7 | 11.5 |  |  |  |  |  |
Additional stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 88.0 |  |  |  |  |  |  |  |
Additional stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional stock based compensation net of tax recognized in connection with current year change in control transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56.3 |  |  |  |  |  |  |  |
Shares authorized for grant |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,300,000 | 8,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of Stock option and SARs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |
Special dividend paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.41 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of Stock option and SARs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10.07 |  |  |  |  |  | $ 10.07 |  |  |  |  |  |  |  |  |  |  |
Exercise price of Stock option and SARs after modification |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6.65 |  |  |  |  | $ 6.65 |  |  |  |  |  |  |  |  |  |  |
Percentage of stock options and stock appreciation rights vest granted based on service condition award |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of stock options and stock appreciation rights vest granted based on market condition award |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |
Service condition awards vesting percentage on either the first anniversary or one year after the grant date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
One year after the grant date control transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |
Existing option holders received in cash consideration for the value of their options |  |  |  |  |  |  |  |  | 91.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service condition option weighted-average granted during period fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.97 |  |  |  |  |  |  |  |  |  |  | $ 15.45 | $ 8.28 | $ 6.07 |
Expected volatility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 years 2 months 9 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate of return |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.89% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant date fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.08 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options vested |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options exercised |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,100 | 6,500 |  |  |  |  |  |  |
Intrinsic value of stock options exercised |  |  |  |  |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63.7 |  |  |  |  |  |  |
Stock-based compensation expense remaining to be recognized in future years for service condition options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.2 | 2.5 |  |  |  |  |  |  |  | 15.2 |  |  |  |  |  |  |  |  |
Shares, Granted |  |  |  |  |  |  | 6,619,789 |  |  |  |  |  |  |  |  |  |  | 900,000 |  |  |  | 6,600,000 |  |  |  |  | 55,600 | 342,000 | 3,104,658 |  |  |  |  |  |
Stock-based compensation expense remaining to be recognized with a weighted-average recognition period for service condition options |  |  |  |  |  |  |  |  |  |  | 4 years 7 months 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense remaining to be recognized with a weighted-average recognition period for market condition options |  |  |  |  |  |  |  |  |  |  |  | 4 years 4 months 24 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares, Granted |  | 100,000 | 25,082 | 0 | 556,276 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period for restricted stock granted |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Restricted stock awards granted with a grant date aggregate fair value |  | 0.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of restricted stock vested |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44.3 |  |  |  |  |  |

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- Definition Percentage of service condition options vesting quarterly after either the first anniversary of the 2012 Change in control Transaction or one year after the grant date. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award equity instruments other than options granted in period fair value. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 + Details
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- Definition Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest. + References No definition available. + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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