v2.4.0.6

Investment in Affiliated Companies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Investments in Affiliated Companies [Abstract] |
Summary of Investments in affiliated companies |
(in millions) |  | TransUnion Corp. Successor December 31, 2012 |  |  | TransUnion Corp. Predecessor December 31, 2011 |
Trans Union de Mexico, S.A. (25.69% ownership interest) |  | $ | 49.4 |  |  | $ | 8.5 |
Credit Information Bureau (India) Ltd. (27.5% ownership interest) |  |  | 26.6 |  |  |  | 19.5 |
All other equity method investments |  |  | 4.7 |  |  |  | 6.8 |
Total equity method investments |  | $ | 80.7 |  |  | $ | 34.8 |
Total cost method investments |  |  | 7.9 |  |  |  | 7.9 |
Total investments in affiliated companies |  | $ | 88.6 |  |  | $ | 42.7 |

X
- Details
Name: | tcu_InvestmentsInAffiliatedCompaniesAbstract
Namespace Prefix: | tcu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investments in and advances to affiliates. Does not include the tabular disclosure of the disaggregation of investments in and advances to affiliates across legal entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Article 12 + Details
Name: | us-gaap_InvestmentsInAndAdvancesToAffiliatesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration