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Investments in Affiliated Companies (Details Textual) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 4 Months Ended | 12 Months Ended | 4 Months Ended | 8 Months Ended | 4 Months Ended | 12 Months Ended | 8 Months Ended | 12 Months Ended | 8 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2011
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2010
TransUnion Corp-Predecessor [Member]
|
Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
Mexico [Member]
|
Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
India [Member]
|
Dec. 31, 2012
TransUnion Corp-Successor [Member]
|
Dec. 31, 2012
TransUnion Corp-Successor [Member]
Mexico [Member]
|
Dec. 31, 2012
TransUnion Corp-Successor [Member]
India [Member]
|
Apr. 30, 2012
Equity Method Investments [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2011
Equity Method Investments [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2010
Equity Method Investments [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2012
Equity Method Investments [Member]
TransUnion Corp-Successor [Member]
|
Dec. 31, 2011
Cost-method Investments [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2010
Cost-method Investments [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2012
Cost-method Investments [Member]
TransUnion Corp-Successor [Member]
|
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| Investments in Affiliated Companies (Textual) [Abstract] | ||||||||||||||||||
| Share earnings of equity method investees | $ 4.1 | $ 11.4 | $ 8.4 | $ 2.3 | $ 0.6 | $ 8.0 | $ 4.4 | $ 1.4 | ||||||||||
| Dividends received from equity method investments | 0.4 | 8.0 | 4.9 | 9.3 | ||||||||||||||
| Dividends received from cost method investments | 0.6 | 0.5 | 0.6 | |||||||||||||||
| Investments in Affiliated Companies (Additional Textual) [Abstract] | ||||||||||||||||||
| Percentage of Ownership Interest | 20.00% | |||||||||||||||||
| Impairments of investments in affiliated companies | $ 0 | $ 0 | $ 0 | |||||||||||||||