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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
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Dec. 31, 2012
Restricted Stock [Member]
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Dec. 31, 2012
Restricted Stock [Member]
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Dec. 31, 2011
Restricted Stock [Member]
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Dec. 31, 2010
Restricted Stock [Member]
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Dec. 31, 2012
Maximum [Member]
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Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
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Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
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Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
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Dec. 31, 2010
TransUnion Holding Company, Inc. [Member]
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Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
Service Condition Option [Member]
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Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
Market Condition Option [Member]
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Dec. 31, 2012
TransUnion Corp-Successor [Member]
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Dec. 31, 2012
TransUnion Corp-Successor [Member]
TransUnion Holding Company, Inc. [Member]
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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]
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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]
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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]
|
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| 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 | ||||||||||||||||||||||||||||||||||